mdp469TK

1<?php
2/**
3 * These functions can be replaced via plugins. If plugins do not redefine these
4 * functions, then these will be used instead.
5 *
6 * @package WordPress
7 */
8
9if ( !function_exists('wp_set_current_user') ) :
10/**
11 * Changes the current user by ID or name.
12 *
13 * Set $id to null and specify a name if you do not know a user's ID.
14 *
15 * Some WordPress functionality is based on the current user and not based on
16 * the signed in user. Therefore, it opens the ability to edit and perform
17 * actions on users who aren't signed in.
18 *
19 * @since 2.0.3
20 * @global object $current_user The current user object which holds the user data.
21 * @uses do_action() Calls 'set_current_user' hook after setting the current user.
22 *
23 * @param int $id User ID
24 * @param string $name User's username
25 * @return WP_User Current user User object
26 */
27function wp_set_current_user($id, $name = '') {
28	global $current_user;
29
30	if ( isset( $current_user ) && ( $current_user instanceof WP_User ) && ( $id == $current_user->ID ) )
31		return $current_user;
32
33	$current_user = new WP_User( $id, $name );
34
35	setup_userdata( $current_user->ID );
36
37	do_action('set_current_user');
38
39	return $current_user;
40}
41endif;
42
43if ( !function_exists('wp_get_current_user') ) :
44/**
45 * Retrieve the current user object.
46 *
47 * @since 2.0.3
48 *
49 * @return WP_User Current user WP_User object
50 */
51function wp_get_current_user() {
52	global $current_user;
53
54	get_currentuserinfo();
55
56	return $current_user;
57}
58endif;
59
60if ( !function_exists('get_currentuserinfo') ) :
61/**
62 * Populate global variables with information about the currently logged in user.
63 *
64 * Will set the current user, if the current user is not set. The current user
65 * will be set to the logged in person. If no user is logged in, then it will
66 * set the current user to 0, which is invalid and won't have any permissions.
67 *
68 * @since 0.71
69 * @uses $current_user Checks if the current user is set
70 * @uses wp_validate_auth_cookie() Retrieves current logged in user.
71 *
72 * @return bool|null False on XMLRPC Request and invalid auth cookie. Null when current user set
73 */
74function get_currentuserinfo() {
75	global $current_user;
76
77	if ( ! empty( $current_user ) ) {
78		if ( $current_user instanceof WP_User )
79			return;
80
81		// Upgrade stdClass to WP_User
82		if ( is_object( $current_user ) && isset( $current_user->ID ) ) {
83			$cur_id = $current_user->ID;
84			$current_user = null;
85			wp_set_current_user( $cur_id );
86			return;
87		}
88
89		// $current_user has a junk value. Force to WP_User with ID 0.
90		$current_user = null;
91		wp_set_current_user( 0 );
92		return false;
93	}
94
95	if ( defined('XMLRPC_REQUEST') && XMLRPC_REQUEST ) {
96		wp_set_current_user( 0 );
97		return false;
98	}
99
100	if ( ! $user = wp_validate_auth_cookie() ) {
101		 if ( is_blog_admin() || is_network_admin() || empty( $_COOKIE[LOGGED_IN_COOKIE] ) || !$user = wp_validate_auth_cookie( $_COOKIE[LOGGED_IN_COOKIE], 'logged_in' ) ) {
102		 	wp_set_current_user( 0 );
103		 	return false;
104		 }
105	}
106
107	wp_set_current_user( $user );
108}
109endif;
110
111if ( !function_exists('get_userdata') ) :
112/**
113 * Retrieve user info by user ID.
114 *
115 * @since 0.71
116 *
117 * @param int $user_id User ID
118 * @return bool|object False on failure, WP_User object on success
119 */
120function get_userdata( $user_id ) {
121	return get_user_by( 'id', $user_id );
122}
123endif;
124
125if ( !function_exists('get_user_by') ) :
126/**
127 * Retrieve user info by a given field
128 *
129 * @since 2.8.0
130 *
131 * @param string $field The field to retrieve the user with. id | slug | email | login
132 * @param int|string $value A value for $field. A user ID, slug, email address, or login name.
133 * @return bool|object False on failure, WP_User object on success
134 */
135function get_user_by( $field, $value ) {
136	$userdata = WP_User::get_data_by( $field, $value );
137
138	if ( !$userdata )
139		return false;
140
141	$user = new WP_User;
142	$user->init( $userdata );
143
144	return $user;
145}
146endif;
147
148if ( !function_exists('cache_users') ) :
149/**
150 * Retrieve info for user lists to prevent multiple queries by get_userdata()
151 *
152 * @since 3.0.0
153 *
154 * @param array $user_ids User ID numbers list
155 */
156function cache_users( $user_ids ) {
157	global $wpdb;
158
159	$clean = _get_non_cached_ids( $user_ids, 'users' );
160
161	if ( empty( $clean ) )
162		return;
163
164	$list = implode( ',', $clean );
165
166	$users = $wpdb->get_results( "SELECT * FROM $wpdb->users WHERE ID IN ($list)" );
167
168	$ids = array();
169	foreach ( $users as $user ) {
170		update_user_caches( $user );
171		$ids[] = $user->ID;
172	}
173	update_meta_cache( 'user', $ids );
174}
175endif;
176
177if ( !function_exists( 'wp_mail' ) ) :
178/**
179 * Send mail, similar to PHP's mail
180 *
181 * A true return value does not automatically mean that the user received the
182 * email successfully. It just only means that the method used was able to
183 * process the request without any errors.
184 *
185 * Using the two 'wp_mail_from' and 'wp_mail_from_name' hooks allow from
186 * creating a from address like 'Name <email@address.com>' when both are set. If
187 * just 'wp_mail_from' is set, then just the email address will be used with no
188 * name.
189 *
190 * The default content type is 'text/plain' which does not allow using HTML.
191 * However, you can set the content type of the email by using the
192 * 'wp_mail_content_type' filter.
193 *
194 * The default charset is based on the charset used on the blog. The charset can
195 * be set using the 'wp_mail_charset' filter.
196 *
197 * @since 1.2.1
198 * @uses apply_filters() Calls 'wp_mail' hook on an array of all of the parameters.
199 * @uses apply_filters() Calls 'wp_mail_from' hook to get the from email address.
200 * @uses apply_filters() Calls 'wp_mail_from_name' hook to get the from address name.
201 * @uses apply_filters() Calls 'wp_mail_content_type' hook to get the email content type.
202 * @uses apply_filters() Calls 'wp_mail_charset' hook to get the email charset
203 * @uses do_action_ref_array() Calls 'phpmailer_init' hook on the reference to
204 *		phpmailer object.
205 * @uses PHPMailer
206 *
207 * @param string|array $to Array or comma-separated list of email addresses to send message.
208 * @param string $subject Email subject
209 * @param string $message Message contents
210 * @param string|array $headers Optional. Additional headers.
211 * @param string|array $attachments Optional. Files to attach.
212 * @return bool Whether the email contents were sent successfully.
213 */
214function wp_mail( $to, $subject, $message, $headers = '', $attachments = array() ) {
215	// Compact the input, apply the filters, and extract them back out
216	extract( apply_filters( 'wp_mail', compact( 'to', 'subject', 'message', 'headers', 'attachments' ) ) );
217
218	if ( !is_array($attachments) )
219		$attachments = explode( "\n", str_replace( "\r\n", "\n", $attachments ) );
220
221	global $phpmailer;
222
223	// (Re)create it, if it's gone missing
224	if ( !is_object( $phpmailer ) || !is_a( $phpmailer, 'PHPMailer' ) ) {
225		require_once ABSPATH . WPINC . '/class-phpmailer.php';
226		require_once ABSPATH . WPINC . '/class-smtp.php';
227		$phpmailer = new PHPMailer( true );
228	}
229
230	// Headers
231	if ( empty( $headers ) ) {
232		$headers = array();
233	} else {
234		if ( !is_array( $headers ) ) {
235			// Explode the headers out, so this function can take both
236			// string headers and an array of headers.
237			$tempheaders = explode( "\n", str_replace( "\r\n", "\n", $headers ) );
238		} else {
239			$tempheaders = $headers;
240		}
241		$headers = array();
242		$cc = array();
243		$bcc = array();
244
245		// If it's actually got contents
246		if ( !empty( $tempheaders ) ) {
247			// Iterate through the raw headers
248			foreach ( (array) $tempheaders as $header ) {
249				if ( strpos($header, ':') === false ) {
250					if ( false !== stripos( $header, 'boundary=' ) ) {
251						$parts = preg_split('/boundary=/i', trim( $header ) );
252						$boundary = trim( str_replace( array( "'", '"' ), '', $parts[1] ) );
253					}
254					continue;
255				}
256				// Explode them out
257				list( $name, $content ) = explode( ':', trim( $header ), 2 );
258
259				// Cleanup crew
260				$name    = trim( $name    );
261				$content = trim( $content );
262
263				switch ( strtolower( $name ) ) {
264					// Mainly for legacy -- process a From: header if it's there
265					case 'from':
266						if ( strpos($content, '<' ) !== false ) {
267							// So... making my life hard again?
268							$from_name = substr( $content, 0, strpos( $content, '<' ) - 1 );
269							$from_name = str_replace( '"', '', $from_name );
270							$from_name = trim( $from_name );
271
272							$from_email = substr( $content, strpos( $content, '<' ) + 1 );
273							$from_email = str_replace( '>', '', $from_email );
274							$from_email = trim( $from_email );
275						} else {
276							$from_email = trim( $content );
277						}
278						break;
279					case 'content-type':
280						if ( strpos( $content, ';' ) !== false ) {
281							list( $type, $charset ) = explode( ';', $content );
282							$content_type = trim( $type );
283							if ( false !== stripos( $charset, 'charset=' ) ) {
284								$charset = trim( str_replace( array( 'charset=', '"' ), '', $charset ) );
285							} elseif ( false !== stripos( $charset, 'boundary=' ) ) {
286								$boundary = trim( str_replace( array( 'BOUNDARY=', 'boundary=', '"' ), '', $charset ) );
287								$charset = '';
288							}
289						} else {
290							$content_type = trim( $content );
291						}
292						break;
293					case 'cc':
294						$cc = array_merge( (array) $cc, explode( ',', $content ) );
295						break;
296					case 'bcc':
297						$bcc = array_merge( (array) $bcc, explode( ',', $content ) );
298						break;
299					default:
300						// Add it to our grand headers array
301						$headers[trim( $name )] = trim( $content );
302						break;
303				}
304			}
305		}
306	}
307
308	// Empty out the values that may be set
309	$phpmailer->ClearAddresses();
310	$phpmailer->ClearAllRecipients();
311	$phpmailer->ClearAttachments();
312	$phpmailer->ClearBCCs();
313	$phpmailer->ClearCCs();
314	$phpmailer->ClearCustomHeaders();
315	$phpmailer->ClearReplyTos();
316
317	// From email and name
318	// If we don't have a name from the input headers
319	if ( !isset( $from_name ) )
320		$from_name = 'WordPress';
321
322	/* If we don't have an email from the input headers default to wordpress@$sitename
323	 * Some hosts will block outgoing mail from this address if it doesn't exist but
324	 * there's no easy alternative. Defaulting to admin_email might appear to be another
325	 * option but some hosts may refuse to relay mail from an unknown domain. See
326	 * http://trac.wordpress.org/ticket/5007.
327	 */
328
329	if ( !isset( $from_email ) ) {
330		// Get the site domain and get rid of www.
331		$sitename = strtolower( $_SERVER['SERVER_NAME'] );
332		if ( substr( $sitename, 0, 4 ) == 'www.' ) {
333			$sitename = substr( $sitename, 4 );
334		}
335
336		$from_email = 'wordpress@' . $sitename;
337	}
338
339	// Plugin authors can override the potentially troublesome default
340	$phpmailer->From     = apply_filters( 'wp_mail_from'     , $from_email );
341	$phpmailer->FromName = apply_filters( 'wp_mail_from_name', $from_name  );
342
343	// Set destination addresses
344	if ( !is_array( $to ) )
345		$to = explode( ',', $to );
346
347	foreach ( (array) $to as $recipient ) {
348		try {
349			// Break $recipient into name and address parts if in the format "Foo <bar@baz.com>"
350			$recipient_name = '';
351			if( preg_match( '/(.*)<(.+)>/', $recipient, $matches ) ) {
352				if ( count( $matches ) == 3 ) {
353					$recipient_name = $matches[1];
354					$recipient = $matches[2];
355				}
356			}
357			$phpmailer->AddAddress( $recipient, $recipient_name);
358		} catch ( phpmailerException $e ) {
359			continue;
360		}
361	}
362
363	// Set mail's subject and body
364	$phpmailer->Subject = $subject;
365	$phpmailer->Body    = $message;
366
367	// Add any CC and BCC recipients
368	if ( !empty( $cc ) ) {
369		foreach ( (array) $cc as $recipient ) {
370			try {
371				// Break $recipient into name and address parts if in the format "Foo <bar@baz.com>"
372				$recipient_name = '';
373				if( preg_match( '/(.*)<(.+)>/', $recipient, $matches ) ) {
374					if ( count( $matches ) == 3 ) {
375						$recipient_name = $matches[1];
376						$recipient = $matches[2];
377					}
378				}
379				$phpmailer->AddCc( $recipient, $recipient_name );
380			} catch ( phpmailerException $e ) {
381				continue;
382			}
383		}
384	}
385
386	if ( !empty( $bcc ) ) {
387		foreach ( (array) $bcc as $recipient) {
388			try {
389				// Break $recipient into name and address parts if in the format "Foo <bar@baz.com>"
390				$recipient_name = '';
391				if( preg_match( '/(.*)<(.+)>/', $recipient, $matches ) ) {
392					if ( count( $matches ) == 3 ) {
393						$recipient_name = $matches[1];
394						$recipient = $matches[2];
395					}
396				}
397				$phpmailer->AddBcc( $recipient, $recipient_name );
398			} catch ( phpmailerException $e ) {
399				continue;
400			}
401		}
402	}
403
404	// Set to use PHP's mail()
405	$phpmailer->IsMail();
406
407	// Set Content-Type and charset
408	// If we don't have a content-type from the input headers
409	if ( !isset( $content_type ) )
410		$content_type = 'text/plain';
411
412	$content_type = apply_filters( 'wp_mail_content_type', $content_type );
413
414	$phpmailer->ContentType = $content_type;
415
416	// Set whether it's plaintext, depending on $content_type
417	if ( 'text/html' == $content_type )
418		$phpmailer->IsHTML( true );
419
420	// If we don't have a charset from the input headers
421	if ( !isset( $charset ) )
422		$charset = get_bloginfo( 'charset' );
423
424	// Set the content-type and charset
425	$phpmailer->CharSet = apply_filters( 'wp_mail_charset', $charset );
426
427	// Set custom headers
428	if ( !empty( $headers ) ) {
429		foreach( (array) $headers as $name => $content ) {
430			$phpmailer->AddCustomHeader( sprintf( '%1$s: %2$s', $name, $content ) );
431		}
432
433		if ( false !== stripos( $content_type, 'multipart' ) && ! empty($boundary) )
434			$phpmailer->AddCustomHeader( sprintf( "Content-Type: %s;\n\t boundary=\"%s\"", $content_type, $boundary ) );
435	}
436
437	if ( !empty( $attachments ) ) {
438		foreach ( $attachments as $attachment ) {
439			try {
440				$phpmailer->AddAttachment($attachment);
441			} catch ( phpmailerException $e ) {
442				continue;
443			}
444		}
445	}
446
447	do_action_ref_array( 'phpmailer_init', array( &$phpmailer ) );
448
449	// Send!
450	try {
451		$phpmailer->Send();
452	} catch ( phpmailerException $e ) {
453		return false;
454	}
455
456	return true;
457}
458endif;
459
460if ( !function_exists('wp_authenticate') ) :
461/**
462 * Checks a user's login information and logs them in if it checks out.
463 *
464 * @since 2.5.0
465 *
466 * @param string $username User's username
467 * @param string $password User's password
468 * @return WP_Error|WP_User WP_User object if login successful, otherwise WP_Error object.
469 */
470function wp_authenticate($username, $password) {
471	$username = sanitize_user($username);
472	$password = trim($password);
473
474	$user = apply_filters('authenticate', null, $username, $password);
475
476	if ( $user == null ) {
477		// TODO what should the error message be? (Or would these even happen?)
478		// Only needed if all authentication handlers fail to return anything.
479		$user = new WP_Error('authentication_failed', __('<strong>ERROR</strong>: Invalid username or incorrect password.'));
480	}
481
482	$ignore_codes = array('empty_username', 'empty_password');
483
484	if (is_wp_error($user) && !in_array($user->get_error_code(), $ignore_codes) ) {
485		do_action('wp_login_failed', $username);
486	}
487
488	return $user;
489}
490endif;
491
492if ( !function_exists('wp_logout') ) :
493/**
494 * Log the current user out.
495 *
496 * @since 2.5.0
497 */
498function wp_logout() {
499	wp_clear_auth_cookie();
500	do_action('wp_logout');
501}
502endif;
503
504if ( !function_exists('wp_validate_auth_cookie') ) :
505/**
506 * Validates authentication cookie.
507 *
508 * The checks include making sure that the authentication cookie is set and
509 * pulling in the contents (if $cookie is not used).
510 *
511 * Makes sure the cookie is not expired. Verifies the hash in cookie is what is
512 * should be and compares the two.
513 *
514 * @since 2.5
515 *
516 * @param string $cookie Optional. If used, will validate contents instead of cookie's
517 * @param string $scheme Optional. The cookie scheme to use: auth, secure_auth, or logged_in
518 * @return bool|int False if invalid cookie, User ID if valid.
519 */
520function wp_validate_auth_cookie($cookie = '', $scheme = '') {
521	if ( ! $cookie_elements = wp_parse_auth_cookie($cookie, $scheme) ) {
522		do_action('auth_cookie_malformed', $cookie, $scheme);
523		return false;
524	}
525
526	extract($cookie_elements, EXTR_OVERWRITE);
527
528	$expired = $expiration;
529
530	// Allow a grace period for POST and AJAX requests
531	if ( defined('DOING_AJAX') || 'POST' == $_SERVER['REQUEST_METHOD'] )
532		$expired += 3600;
533
534	// Quick check to see if an honest cookie has expired
535	if ( $expired < time() ) {
536		do_action('auth_cookie_expired', $cookie_elements);
537		return false;
538	}
539
540	$user = get_user_by('login', $username);
541	if ( ! $user ) {
542		do_action('auth_cookie_bad_username', $cookie_elements);
543		return false;
544	}
545
546	$pass_frag = substr($user->user_pass, 8, 4);
547
548	$key = wp_hash($username . $pass_frag . '|' . $expiration, $scheme);
549	$hash = hash_hmac('md5', $username . '|' . $expiration, $key);
550
551	if ( $hmac != $hash ) {
552		do_action('auth_cookie_bad_hash', $cookie_elements);
553		return false;
554	}
555
556	if ( $expiration < time() ) // AJAX/POST grace period set above
557		$GLOBALS['login_grace_period'] = 1;
558
559	do_action('auth_cookie_valid', $cookie_elements, $user);
560
561	return $user->ID;
562}
563endif;
564
565if ( !function_exists('wp_generate_auth_cookie') ) :
566/**
567 * Generate authentication cookie contents.
568 *
569 * @since 2.5
570 * @uses apply_filters() Calls 'auth_cookie' hook on $cookie contents, User ID
571 *		and expiration of cookie.
572 *
573 * @param int $user_id User ID
574 * @param int $expiration Cookie expiration in seconds
575 * @param string $scheme Optional. The cookie scheme to use: auth, secure_auth, or logged_in
576 * @return string Authentication cookie contents
577 */
578function wp_generate_auth_cookie($user_id, $expiration, $scheme = 'auth') {
579	$user = get_userdata($user_id);
580
581	$pass_frag = substr($user->user_pass, 8, 4);
582
583	$key = wp_hash($user->user_login . $pass_frag . '|' . $expiration, $scheme);
584	$hash = hash_hmac('md5', $user->user_login . '|' . $expiration, $key);
585
586	$cookie = $user->user_login . '|' . $expiration . '|' . $hash;
587
588	return apply_filters('auth_cookie', $cookie, $user_id, $expiration, $scheme);
589}
590endif;
591
592if ( !function_exists('wp_parse_auth_cookie') ) :
593/**
594 * Parse a cookie into its components
595 *
596 * @since 2.7
597 *
598 * @param string $cookie
599 * @param string $scheme Optional. The cookie scheme to use: auth, secure_auth, or logged_in
600 * @return array Authentication cookie components
601 */
602function wp_parse_auth_cookie($cookie = '', $scheme = '') {
603	if ( empty($cookie) ) {
604		switch ($scheme){
605			case 'auth':
606				$cookie_name = AUTH_COOKIE;
607				break;
608			case 'secure_auth':
609				$cookie_name = SECURE_AUTH_COOKIE;
610				break;
611			case "logged_in":
612				$cookie_name = LOGGED_IN_COOKIE;
613				break;
614			default:
615				if ( is_ssl() ) {
616					$cookie_name = SECURE_AUTH_COOKIE;
617					$scheme = 'secure_auth';
618				} else {
619					$cookie_name = AUTH_COOKIE;
620					$scheme = 'auth';
621				}
622	    }
623
624		if ( empty($_COOKIE[$cookie_name]) )
625			return false;
626		$cookie = $_COOKIE[$cookie_name];
627	}
628
629	$cookie_elements = explode('|', $cookie);
630	if ( count($cookie_elements) != 3 )
631		return false;
632
633	list($username, $expiration, $hmac) = $cookie_elements;
634
635	return compact('username', 'expiration', 'hmac', 'scheme');
636}
637endif;
638
639if ( !function_exists('wp_set_auth_cookie') ) :
640/**
641 * Sets the authentication cookies based User ID.
642 *
643 * The $remember parameter increases the time that the cookie will be kept. The
644 * default the cookie is kept without remembering is two days. When $remember is
645 * set, the cookies will be kept for 14 days or two weeks.
646 *
647 * @since 2.5
648 *
649 * @param int $user_id User ID
650 * @param bool $remember Whether to remember the user
651 */
652function wp_set_auth_cookie($user_id, $remember = false, $secure = '') {
653	if ( $remember ) {
654		$expiration = $expire = time() + apply_filters('auth_cookie_expiration', 1209600, $user_id, $remember);
655	} else {
656		$expiration = time() + apply_filters('auth_cookie_expiration', 172800, $user_id, $remember);
657		$expire = 0;
658	}
659
660	if ( '' === $secure )
661		$secure = is_ssl();
662
663	$secure = apply_filters('secure_auth_cookie', $secure, $user_id);
664	$secure_logged_in_cookie = apply_filters('secure_logged_in_cookie', false, $user_id, $secure);
665
666	if ( $secure ) {
667		$auth_cookie_name = SECURE_AUTH_COOKIE;
668		$scheme = 'secure_auth';
669	} else {
670		$auth_cookie_name = AUTH_COOKIE;
671		$scheme = 'auth';
672	}
673
674	$auth_cookie = wp_generate_auth_cookie($user_id, $expiration, $scheme);
675	$logged_in_cookie = wp_generate_auth_cookie($user_id, $expiration, 'logged_in');
676
677	do_action('set_auth_cookie', $auth_cookie, $expire, $expiration, $user_id, $scheme);
678	do_action('set_logged_in_cookie', $logged_in_cookie, $expire, $expiration, $user_id, 'logged_in');
679
680	setcookie($auth_cookie_name, $auth_cookie, $expire, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN, $secure, true);
681	setcookie($auth_cookie_name, $auth_cookie, $expire, ADMIN_COOKIE_PATH, COOKIE_DOMAIN, $secure, true);
682	setcookie(LOGGED_IN_COOKIE, $logged_in_cookie, $expire, COOKIEPATH, COOKIE_DOMAIN, $secure_logged_in_cookie, true);
683	if ( COOKIEPATH != SITECOOKIEPATH )
684		setcookie(LOGGED_IN_COOKIE, $logged_in_cookie, $expire, SITECOOKIEPATH, COOKIE_DOMAIN, $secure_logged_in_cookie, true);
685}
686endif;
687
688if ( !function_exists('wp_clear_auth_cookie') ) :
689/**
690 * Removes all of the cookies associated with authentication.
691 *
692 * @since 2.5
693 */
694function wp_clear_auth_cookie() {
695	do_action('clear_auth_cookie');
696
697	setcookie(AUTH_COOKIE, ' ', time() - 31536000, ADMIN_COOKIE_PATH, COOKIE_DOMAIN);
698	setcookie(SECURE_AUTH_COOKIE, ' ', time() - 31536000, ADMIN_COOKIE_PATH, COOKIE_DOMAIN);
699	setcookie(AUTH_COOKIE, ' ', time() - 31536000, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN);
700	setcookie(SECURE_AUTH_COOKIE, ' ', time() - 31536000, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN);
701	setcookie(LOGGED_IN_COOKIE, ' ', time() - 31536000, COOKIEPATH, COOKIE_DOMAIN);
702	setcookie(LOGGED_IN_COOKIE, ' ', time() - 31536000, SITECOOKIEPATH, COOKIE_DOMAIN);
703
704	// Old cookies
705	setcookie(AUTH_COOKIE, ' ', time() - 31536000, COOKIEPATH, COOKIE_DOMAIN);
706	setcookie(AUTH_COOKIE, ' ', time() - 31536000, SITECOOKIEPATH, COOKIE_DOMAIN);
707	setcookie(SECURE_AUTH_COOKIE, ' ', time() - 31536000, COOKIEPATH, COOKIE_DOMAIN);
708	setcookie(SECURE_AUTH_COOKIE, ' ', time() - 31536000, SITECOOKIEPATH, COOKIE_DOMAIN);
709
710	// Even older cookies
711	setcookie(USER_COOKIE, ' ', time() - 31536000, COOKIEPATH, COOKIE_DOMAIN);
712	setcookie(PASS_COOKIE, ' ', time() - 31536000, COOKIEPATH, COOKIE_DOMAIN);
713	setcookie(USER_COOKIE, ' ', time() - 31536000, SITECOOKIEPATH, COOKIE_DOMAIN);
714	setcookie(PASS_COOKIE, ' ', time() - 31536000, SITECOOKIEPATH, COOKIE_DOMAIN);
715}
716endif;
717
718if ( !function_exists('is_user_logged_in') ) :
719/**
720 * Checks if the current visitor is a logged in user.
721 *
722 * @since 2.0.0
723 *
724 * @return bool True if user is logged in, false if not logged in.
725 */
726function is_user_logged_in() {
727	$user = wp_get_current_user();
728
729	if ( ! $user->exists() )
730		return false;
731
732	return true;
733}
734endif;
735
736if ( !function_exists('auth_redirect') ) :
737/**
738 * Checks if a user is logged in, if not it redirects them to the login page.
739 *
740 * @since 1.5
741 */
742function auth_redirect() {
743	// Checks if a user is logged in, if not redirects them to the login page
744
745	$secure = ( is_ssl() || force_ssl_admin() );
746
747	$secure = apply_filters('secure_auth_redirect', $secure);
748
749	// If https is required and request is http, redirect
750	if ( $secure && !is_ssl() && false !== strpos($_SERVER['REQUEST_URI'], 'wp-admin') ) {
751		if ( 0 === strpos($_SERVER['REQUEST_URI'], 'http') ) {
752			wp_redirect(preg_replace('|^http://|', 'https://', $_SERVER['REQUEST_URI']));
753			exit();
754		} else {
755			wp_redirect('https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
756			exit();
757		}
758	}
759
760	if ( is_user_admin() )
761		$scheme = 'logged_in';
762	else
763		$scheme = apply_filters( 'auth_redirect_scheme', '' );
764
765	if ( $user_id = wp_validate_auth_cookie( '',  $scheme) ) {
766		do_action('auth_redirect', $user_id);
767
768		// If the user wants ssl but the session is not ssl, redirect.
769		if ( !$secure && get_user_option('use_ssl', $user_id) && false !== strpos($_SERVER['REQUEST_URI'], 'wp-admin') ) {
770			if ( 0 === strpos($_SERVER['REQUEST_URI'], 'http') ) {
771				wp_redirect(preg_replace('|^http://|', 'https://', $_SERVER['REQUEST_URI']));
772				exit();
773			} else {
774				wp_redirect('https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
775				exit();
776			}
777		}
778
779		return;  // The cookie is good so we're done
780	}
781
782	// The cookie is no good so force login
783	nocache_headers();
784
785	if ( is_ssl() )
786		$proto = 'https://';
787	else
788		$proto = 'http://';
789
790	$redirect = ( strpos($_SERVER['REQUEST_URI'], '/options.php') && wp_get_referer() ) ? wp_get_referer() : $proto . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
791
792	$login_url = wp_login_url($redirect, true);
793
794	wp_redirect($login_url);
795	exit();
796}
797endif;
798
799if ( !function_exists('check_admin_referer') ) :
800/**
801 * Makes sure that a user was referred from another admin page.
802 *
803 * To avoid security exploits.
804 *
805 * @since 1.2.0
806 * @uses do_action() Calls 'check_admin_referer' on $action.
807 *
808 * @param string $action Action nonce
809 * @param string $query_arg where to look for nonce in $_REQUEST (since 2.5)
810 */
811function check_admin_referer($action = -1, $query_arg = '_wpnonce') {
812	if ( -1 == $action )
813		_doing_it_wrong( __FUNCTION__, __( 'You should specify a nonce action to be verified by using the first parameter.' ), '3.2' );
814
815	$adminurl = strtolower(admin_url());
816	$referer = strtolower(wp_get_referer());
817	$result = isset($_REQUEST[$query_arg]) ? wp_verify_nonce($_REQUEST[$query_arg], $action) : false;
818	if ( !$result && !(-1 == $action && strpos($referer, $adminurl) === 0) ) {
819		wp_nonce_ays($action);
820		die();
821	}
822	do_action('check_admin_referer', $action, $result);
823	return $result;
824}endif;
825
826if ( !function_exists('check_ajax_referer') ) :
827/**
828 * Verifies the AJAX request to prevent processing requests external of the blog.
829 *
830 * @since 2.0.3
831 *
832 * @param string $action Action nonce
833 * @param string $query_arg where to look for nonce in $_REQUEST (since 2.5)
834 */
835function check_ajax_referer( $action = -1, $query_arg = false, $die = true ) {
836	if ( $query_arg )
837		$nonce = $_REQUEST[$query_arg];
838	else
839		$nonce = isset($_REQUEST['_ajax_nonce']) ? $_REQUEST['_ajax_nonce'] : $_REQUEST['_wpnonce'];
840
841	$result = wp_verify_nonce( $nonce, $action );
842
843	if ( $die && false == $result ) {
844		if ( defined( 'DOING_AJAX' ) && DOING_AJAX )
845			wp_die( -1 );
846		else
847			die( '-1' );
848	}
849
850	do_action('check_ajax_referer', $action, $result);
851
852	return $result;
853}
854endif;
855
856if ( !function_exists('wp_redirect') ) :
857/**
858 * Redirects to another page.
859 *
860 * @since 1.5.1
861 * @uses apply_filters() Calls 'wp_redirect' hook on $location and $status.
862 *
863 * @param string $location The path to redirect to
864 * @param int $status Status code to use
865 * @return bool False if $location is not set
866 */
867function wp_redirect($location, $status = 302) {
868	global $is_IIS;
869
870	$location = apply_filters('wp_redirect', $location, $status);
871	$status = apply_filters('wp_redirect_status', $status, $location);
872
873	if ( !$location ) // allows the wp_redirect filter to cancel a redirect
874		return false;
875
876	$location = wp_sanitize_redirect($location);
877
878	if ( !$is_IIS && php_sapi_name() != 'cgi-fcgi' )
879		status_header($status); // This causes problems on IIS and some FastCGI setups
880
881	header("Location: $location", true, $status);
882}
883endif;
884
885if ( !function_exists('wp_sanitize_redirect') ) :
886/**
887 * Sanitizes a URL for use in a redirect.
888 *
889 * @since 2.3
890 *
891 * @return string redirect-sanitized URL
892 **/
893function wp_sanitize_redirect($location) {
894	$location = preg_replace('|[^a-z0-9-~+_.?#=&;,/:%!]|i', '', $location);
895	$location = wp_kses_no_null($location);
896
897	// remove %0d and %0a from location
898	$strip = array('%0d', '%0a', '%0D', '%0A');
899	$location = _deep_replace($strip, $location);
900	return $location;
901}
902endif;
903
904if ( !function_exists('wp_safe_redirect') ) :
905/**
906 * Performs a safe (local) redirect, using wp_redirect().
907 *
908 * Checks whether the $location is using an allowed host, if it has an absolute
909 * path. A plugin can therefore set or remove allowed host(s) to or from the
910 * list.
911 *
912 * If the host is not allowed, then the redirect is to wp-admin on the siteurl
913 * instead. This prevents malicious redirects which redirect to another host,
914 * but only used in a few places.
915 *
916 * @since 2.3
917 * @uses wp_validate_redirect() To validate the redirect is to an allowed host.
918 *
919 * @return void Does not return anything
920 **/
921function wp_safe_redirect($location, $status = 302) {
922
923	// Need to look at the URL the way it will end up in wp_redirect()
924	$location = wp_sanitize_redirect($location);
925
926	$location = wp_validate_redirect($location, admin_url());
927
928	wp_redirect($location, $status);
929}
930endif;
931
932if ( !function_exists('wp_validate_redirect') ) :
933/**
934 * Validates a URL for use in a redirect.
935 *
936 * Checks whether the $location is using an allowed host, if it has an absolute
937 * path. A plugin can therefore set or remove allowed host(s) to or from the
938 * list.
939 *
940 * If the host is not allowed, then the redirect is to $default supplied
941 *
942 * @since 2.8.1
943 * @uses apply_filters() Calls 'allowed_redirect_hosts' on an array containing
944 *		WordPress host string and $location host string.
945 *
946 * @param string $location The redirect to validate
947 * @param string $default The value to return if $location is not allowed
948 * @return string redirect-sanitized URL
949 **/
950function wp_validate_redirect($location, $default = '') {
951	// browsers will assume 'http' is your protocol, and will obey a redirect to a URL starting with '//'
952	if ( substr($location, 0, 2) == '//' )
953		$location = 'http:' . $location;
954
955	// In php 5 parse_url may fail if the URL query part contains http://, bug #38143
956	$test = ( $cut = strpos($location, '?') ) ? substr( $location, 0, $cut ) : $location;
957
958	$lp  = parse_url($test);
959
960	// Give up if malformed URL
961	if ( false === $lp )
962		return $default;
963
964	// Allow only http and https schemes. No data:, etc.
965	if ( isset($lp['scheme']) && !('http' == $lp['scheme'] || 'https' == $lp['scheme']) )
966		return $default;
967
968	// Reject if scheme is set but host is not. This catches urls like https:host.com for which parse_url does not set the host field.
969	if ( isset($lp['scheme'])  && !isset($lp['host']) )
970		return $default;
971
972	$wpp = parse_url(home_url());
973
974	$allowed_hosts = (array) apply_filters('allowed_redirect_hosts', array($wpp['host']), isset($lp['host']) ? $lp['host'] : '');
975
976	if ( isset($lp['host']) && ( !in_array($lp['host'], $allowed_hosts) && $lp['host'] != strtolower($wpp['host'])) )
977		$location = $default;
978
979	return $location;
980}
981endif;
982
983if ( ! function_exists('wp_notify_postauthor') ) :
984/**
985 * Notify an author of a comment/trackback/pingback to one of their posts.
986 *
987 * @since 1.0.0
988 *
989 * @param int $comment_id Comment ID
990 * @param string $comment_type Optional. The comment type either 'comment' (default), 'trackback', or 'pingback'
991 * @return bool False if user email does not exist. True on completion.
992 */
993function wp_notify_postauthor( $comment_id, $comment_type = '' ) {
994	$comment = get_comment( $comment_id );
995	$post    = get_post( $comment->comment_post_ID );
996	$author  = get_userdata( $post->post_author );
997
998	// The comment was left by the author
999	if ( $comment->user_id == $post->post_author )
1000		return false;
1001
1002	// The author moderated a comment on his own post
1003	if ( $post->post_author == get_current_user_id() )
1004		return false;
1005
1006	// If there's no email to send the comment to
1007	if ( '' == $author->user_email )
1008		return false;
1009
1010	$comment_author_domain = @gethostbyaddr($comment->comment_author_IP);
1011
1012	// The blogname option is escaped with esc_html on the way into the database in sanitize_option
1013	// we want to reverse this for the plain text arena of emails.
1014	$blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES);
1015
1016	if ( empty( $comment_type ) ) $comment_type = 'comment';
1017
1018	if ('comment' == $comment_type) {
1019		$notify_message  = sprintf( __( 'New comment on your post "%s"' ), $post->post_title ) . "\r\n";
1020		/* translators: 1: comment author, 2: author IP, 3: author domain */
1021		$notify_message .= sprintf( __('Author : %1$s (IP: %2$s , %3$s)'), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1022		$notify_message .= sprintf( __('E-mail : %s'), $comment->comment_author_email ) . "\r\n";
1023		$notify_message .= sprintf( __('URL    : %s'), $comment->comment_author_url ) . "\r\n";
1024		$notify_message .= sprintf( __('Whois  : http://whois.arin.net/rest/ip/%s'), $comment->comment_author_IP ) . "\r\n";
1025		$notify_message .= __('Comment: ') . "\r\n" . $comment->comment_content . "\r\n\r\n";
1026		$notify_message .= __('You can see all comments on this post here: ') . "\r\n";
1027		/* translators: 1: blog name, 2: post title */
1028		$subject = sprintf( __('[%1$s] Comment: "%2$s"'), $blogname, $post->post_title );
1029	} elseif ('trackback' == $comment_type) {
1030		$notify_message  = sprintf( __( 'New trackback on your post "%s"' ), $post->post_title ) . "\r\n";
1031		/* translators: 1: website name, 2: author IP, 3: author domain */
1032		$notify_message .= sprintf( __('Website: %1$s (IP: %2$s , %3$s)'), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1033		$notify_message .= sprintf( __('URL    : %s'), $comment->comment_author_url ) . "\r\n";
1034		$notify_message .= __('Excerpt: ') . "\r\n" . $comment->comment_content . "\r\n\r\n";
1035		$notify_message .= __('You can see all trackbacks on this post here: ') . "\r\n";
1036		/* translators: 1: blog name, 2: post title */
1037		$subject = sprintf( __('[%1$s] Trackback: "%2$s"'), $blogname, $post->post_title );
1038	} elseif ('pingback' == $comment_type) {
1039		$notify_message  = sprintf( __( 'New pingback on your post "%s"' ), $post->post_title ) . "\r\n";
1040		/* translators: 1: comment author, 2: author IP, 3: author domain */
1041		$notify_message .= sprintf( __('Website: %1$s (IP: %2$s , %3$s)'), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1042		$notify_message .= sprintf( __('URL    : %s'), $comment->comment_author_url ) . "\r\n";
1043		$notify_message .= __('Excerpt: ') . "\r\n" . sprintf('[...] %s [...]', $comment->comment_content ) . "\r\n\r\n";
1044		$notify_message .= __('You can see all pingbacks on this post here: ') . "\r\n";
1045		/* translators: 1: blog name, 2: post title */
1046		$subject = sprintf( __('[%1$s] Pingback: "%2$s"'), $blogname, $post->post_title );
1047	}
1048	$notify_message .= get_permalink($comment->comment_post_ID) . "#comments\r\n\r\n";
1049	$notify_message .= sprintf( __('Permalink: %s'), get_permalink( $comment->comment_post_ID ) . '#comment-' . $comment_id ) . "\r\n";
1050	if ( EMPTY_TRASH_DAYS )
1051		$notify_message .= sprintf( __('Trash it: %s'), admin_url("comment.php?action=trash&c=$comment_id") ) . "\r\n";
1052	else
1053		$notify_message .= sprintf( __('Delete it: %s'), admin_url("comment.php?action=delete&c=$comment_id") ) . "\r\n";
1054	$notify_message .= sprintf( __('Spam it: %s'), admin_url("comment.php?action=spam&c=$comment_id") ) . "\r\n";
1055
1056	$wp_email = 'wordpress@' . preg_replace('#^www\.#', '', strtolower($_SERVER['SERVER_NAME']));
1057
1058	if ( '' == $comment->comment_author ) {
1059		$from = "From: \"$blogname\" <$wp_email>";
1060		if ( '' != $comment->comment_author_email )
1061			$reply_to = "Reply-To: $comment->comment_author_email";
1062	} else {
1063		$from = "From: \"$comment->comment_author\" <$wp_email>";
1064		if ( '' != $comment->comment_author_email )
1065			$reply_to = "Reply-To: \"$comment->comment_author_email\" <$comment->comment_author_email>";
1066	}
1067
1068	$message_headers = "$from\n"
1069		. "Content-Type: text/plain; charset=\"" . get_option('blog_charset') . "\"\n";
1070
1071	if ( isset($reply_to) )
1072		$message_headers .= $reply_to . "\n";
1073
1074	$notify_message = apply_filters('comment_notification_text', $notify_message, $comment_id);
1075	$subject = apply_filters('comment_notification_subject', $subject, $comment_id);
1076	$message_headers = apply_filters('comment_notification_headers', $message_headers, $comment_id);
1077
1078	@wp_mail( $author->user_email, $subject, $notify_message, $message_headers );
1079
1080	return true;
1081}
1082endif;
1083
1084if ( !function_exists('wp_notify_moderator') ) :
1085/**
1086 * Notifies the moderator of the blog about a new comment that is awaiting approval.
1087 *
1088 * @since 1.0
1089 * @uses $wpdb
1090 *
1091 * @param int $comment_id Comment ID
1092 * @return bool Always returns true
1093 */
1094function wp_notify_moderator($comment_id) {
1095	global $wpdb;
1096
1097	if ( 0 == get_option( 'moderation_notify' ) )
1098		return true;
1099
1100	$comment = get_comment($comment_id);
1101	$post = get_post($comment->comment_post_ID);
1102	$user = get_userdata( $post->post_author );
1103	// Send to the administration and to the post author if the author can modify the comment.
1104	$email_to = array( get_option('admin_email') );
1105	if ( user_can($user->ID, 'edit_comment', $comment_id) && !empty($user->user_email) && ( get_option('admin_email') != $user->user_email) )
1106		$email_to[] = $user->user_email;
1107
1108	$comment_author_domain = @gethostbyaddr($comment->comment_author_IP);
1109	$comments_waiting = $wpdb->get_var("SELECT count(comment_ID) FROM $wpdb->comments WHERE comment_approved = '0'");
1110
1111	// The blogname option is escaped with esc_html on the way into the database in sanitize_option
1112	// we want to reverse this for the plain text arena of emails.
1113	$blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES);
1114
1115	switch ($comment->comment_type)
1116	{
1117		case 'trackback':
1118			$notify_message  = sprintf( __('A new trackback on the post "%s" is waiting for your approval'), $post->post_title ) . "\r\n";
1119			$notify_message .= get_permalink($comment->comment_post_ID) . "\r\n\r\n";
1120			$notify_message .= sprintf( __('Website : %1$s (IP: %2$s , %3$s)'), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1121			$notify_message .= sprintf( __('URL    : %s'), $comment->comment_author_url ) . "\r\n";
1122			$notify_message .= __('Trackback excerpt: ') . "\r\n" . $comment->comment_content . "\r\n\r\n";
1123			break;
1124		case 'pingback':
1125			$notify_message  = sprintf( __('A new pingback on the post "%s" is waiting for your approval'), $post->post_title ) . "\r\n";
1126			$notify_message .= get_permalink($comment->comment_post_ID) . "\r\n\r\n";
1127			$notify_message .= sprintf( __('Website : %1$s (IP: %2$s , %3$s)'), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1128			$notify_message .= sprintf( __('URL    : %s'), $comment->comment_author_url ) . "\r\n";
1129			$notify_message .= __('Pingback excerpt: ') . "\r\n" . $comment->comment_content . "\r\n\r\n";
1130			break;
1131		default: //Comments
1132			$notify_message  = sprintf( __('A new comment on the post "%s" is waiting for your approval'), $post->post_title ) . "\r\n";
1133			$notify_message .= get_permalink($comment->comment_post_ID) . "\r\n\r\n";
1134			$notify_message .= sprintf( __('Author : %1$s (IP: %2$s , %3$s)'), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1135			$notify_message .= sprintf( __('E-mail : %s'), $comment->comment_author_email ) . "\r\n";
1136			$notify_message .= sprintf( __('URL    : %s'), $comment->comment_author_url ) . "\r\n";
1137			$notify_message .= sprintf( __('Whois  : http://whois.arin.net/rest/ip/%s'), $comment->comment_author_IP ) . "\r\n";
1138			$notify_message .= __('Comment: ') . "\r\n" . $comment->comment_content . "\r\n\r\n";
1139			break;
1140	}
1141
1142	$notify_message .= sprintf( __('Approve it: %s'),  admin_url("comment.php?action=approve&c=$comment_id") ) . "\r\n";
1143	if ( EMPTY_TRASH_DAYS )
1144		$notify_message .= sprintf( __('Trash it: %s'), admin_url("comment.php?action=trash&c=$comment_id") ) . "\r\n";
1145	else
1146		$notify_message .= sprintf( __('Delete it: %s'), admin_url("comment.php?action=delete&c=$comment_id") ) . "\r\n";
1147	$notify_message .= sprintf( __('Spam it: %s'), admin_url("comment.php?action=spam&c=$comment_id") ) . "\r\n";
1148
1149	$notify_message .= sprintf( _n('Currently %s comment is waiting for approval. Please visit the moderation panel:',
1150 		'Currently %s comments are waiting for approval. Please visit the moderation panel:', $comments_waiting), number_format_i18n($comments_waiting) ) . "\r\n";
1151	$notify_message .= admin_url("edit-comments.php?comment_status=moderated") . "\r\n";
1152
1153	$subject = sprintf( __('[%1$s] Please moderate: "%2$s"'), $blogname, $post->post_title );
1154	$message_headers = '';
1155
1156	$notify_message = apply_filters('comment_moderation_text', $notify_message, $comment_id);
1157	$subject = apply_filters('comment_moderation_subject', $subject, $comment_id);
1158	$message_headers = apply_filters('comment_moderation_headers', $message_headers);
1159
1160	foreach ( $email_to as $email )
1161		@wp_mail($email, $subject, $notify_message, $message_headers);
1162
1163	return true;
1164}
1165endif;
1166
1167if ( !function_exists('wp_password_change_notification') ) :
1168/**
1169 * Notify the blog admin of a user changing password, normally via email.
1170 *
1171 * @since 2.7
1172 *
1173 * @param object $user User Object
1174 */
1175function wp_password_change_notification(&$user) {
1176	// send a copy of password change notification to the admin
1177	// but check to see if it's the admin whose password we're changing, and skip this
1178	if ( $user->user_email != get_option('admin_email') ) {
1179		$message = sprintf(__('Password Lost and Changed for user: %s'), $user->user_login) . "\r\n";
1180		// The blogname option is escaped with esc_html on the way into the database in sanitize_option
1181		// we want to reverse this for the plain text arena of emails.
1182		$blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES);
1183		wp_mail(get_option('admin_email'), sprintf(__('[%s] Password Lost/Changed'), $blogname), $message);
1184	}
1185}
1186endif;
1187
1188if ( !function_exists('wp_new_user_notification') ) :
1189/**
1190 * Notify the blog admin of a new user, normally via email.
1191 *
1192 * @since 2.0
1193 *
1194 * @param int $user_id User ID
1195 * @param string $plaintext_pass Optional. The user's plaintext password
1196 */
1197function wp_new_user_notification($user_id, $plaintext_pass = '') {
1198	$user = new WP_User($user_id);
1199
1200	$user_login = stripslashes($user->user_login);
1201	$user_email = stripslashes($user->user_email);
1202
1203	// The blogname option is escaped with esc_html on the way into the database in sanitize_option
1204	// we want to reverse this for the plain text arena of emails.
1205	$blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES);
1206
1207	$message  = sprintf(__('New user registration on your site %s:'), $blogname) . "\r\n\r\n";
1208	$message .= sprintf(__('Username: %s'), $user_login) . "\r\n\r\n";
1209	$message .= sprintf(__('E-mail: %s'), $user_email) . "\r\n";
1210
1211	@wp_mail(get_option('admin_email'), sprintf(__('[%s] New User Registration'), $blogname), $message);
1212
1213	if ( empty($plaintext_pass) )
1214		return;
1215
1216	$message  = sprintf(__('Username: %s'), $user_login) . "\r\n";
1217	$message .= sprintf(__('Password: %s'), $plaintext_pass) . "\r\n";
1218	$message .= wp_login_url() . "\r\n";
1219
1220	wp_mail($user_email, sprintf(__('[%s] Your username and password'), $blogname), $message);
1221
1222}
1223endif;
1224
1225if ( !function_exists('wp_nonce_tick') ) :
1226/**
1227 * Get the time-dependent variable for nonce creation.
1228 *
1229 * A nonce has a lifespan of two ticks. Nonces in their second tick may be
1230 * updated, e.g. by autosave.
1231 *
1232 * @since 2.5
1233 *
1234 * @return int
1235 */
1236function wp_nonce_tick() {
1237	$nonce_life = apply_filters('nonce_life', 86400);
1238
1239	return ceil(time() / ( $nonce_life / 2 ));
1240}
1241endif;
1242
1243if ( !function_exists('wp_verify_nonce') ) :
1244/**
1245 * Verify that correct nonce was used with time limit.
1246 *
1247 * The user is given an amount of time to use the token, so therefore, since the
1248 * UID and $action remain the same, the independent variable is the time.
1249 *
1250 * @since 2.0.3
1251 *
1252 * @param string $nonce Nonce that was used in the form to verify
1253 * @param string|int $action Should give context to what is taking place and be the same when nonce was created.
1254 * @return bool Whether the nonce check passed or failed.
1255 */
1256function wp_verify_nonce($nonce, $action = -1) {
1257	$user = wp_get_current_user();
1258	$uid = (int) $user->ID;
1259
1260	$i = wp_nonce_tick();
1261
1262	// Nonce generated 0-12 hours ago
1263	if ( substr(wp_hash($i . $action . $uid, 'nonce'), -12, 10) == $nonce )
1264		return 1;
1265	// Nonce generated 12-24 hours ago
1266	if ( substr(wp_hash(($i - 1) . $action . $uid, 'nonce'), -12, 10) == $nonce )
1267		return 2;
1268	// Invalid nonce
1269	return false;
1270}
1271endif;
1272
1273if ( !function_exists('wp_create_nonce') ) :
1274/**
1275 * Creates a random, one time use token.
1276 *
1277 * @since 2.0.3
1278 *
1279 * @param string|int $action Scalar value to add context to the nonce.
1280 * @return string The one use form token
1281 */
1282function wp_create_nonce($action = -1) {
1283	$user = wp_get_current_user();
1284	$uid = (int) $user->ID;
1285
1286	$i = wp_nonce_tick();
1287
1288	return substr(wp_hash($i . $action . $uid, 'nonce'), -12, 10);
1289}
1290endif;
1291
1292if ( !function_exists('wp_salt') ) :
1293/**
1294 * Get salt to add to hashes.
1295 *
1296 * Salts are created using secret keys. Secret keys are located in two places:
1297 * in the database and in the wp-config.php file. The secret key in the database
1298 * is randomly generated and will be appended to the secret keys in wp-config.php.
1299 *
1300 * The secret keys in wp-config.php should be updated to strong, random keys to maximize
1301 * security. Below is an example of how the secret key constants are defined.
1302 * Do not paste this example directly into wp-config.php. Instead, have a
1303 * {@link https://api.wordpress.org/secret-key/1.1/salt/ secret key created} just
1304 * for you.
1305 *
1306 * <code>
1307 * define('AUTH_KEY',         ' Xakm<o xQy rw4EMsLKM-?!T+,PFF})H4lzcW57AF0U@N@< >M%G4Yt>f`z]MON');
1308 * define('SECURE_AUTH_KEY',  'LzJ}op]mr|6+![P}Ak:uNdJCJZd>(Hx.-Mh#Tz)pCIU#uGEnfFz|f ;;eU%/U^O~');
1309 * define('LOGGED_IN_KEY',    '|i|Ux`9<p-h$aFf(qnT:sDO:D1P^wZ$$/Ra@miTJi9G;ddp_<q}6H1)o|a +&JCM');
1310 * define('NONCE_KEY',        '%:R{[P|,s.KuMltH5}cI;/k<Gx~j!f0I)m_sIyu+&NJZ)-iO>z7X>QYR0Z_XnZ@|');
1311 * define('AUTH_SALT',        'eZyT)-Naw]F8CwA*VaW#q*|.)g@o}||wf~@C-YSt}(dh_r6EbI#A,y|nU2{B#JBW');
1312 * define('SECURE_AUTH_SALT', '!=oLUTXh,QW=H `}`L|9/^4-3 STz},T(w}W<I`.JjPi)<Bmf1v,HpGe}T1:Xt7n');
1313 * define('LOGGED_IN_SALT',   '+XSqHc;@Q*K_b|Z?NC[3H!!EONbh.n<+=uKR:>*c(u`g~EJBf#8u#R{mUEZrozmm');
1314 * define('NONCE_SALT',       'h`GXHhD>SLWVfg1(1(N{;.V!MoE(SfbA_ksP@&`+AycHcAV$+?@3q+rxV{%^VyKT');
1315 * </code>
1316 *
1317 * Salting passwords helps against tools which has stored hashed values of
1318 * common dictionary strings. The added values makes it harder to crack.
1319 *
1320 * @since 2.5
1321 *
1322 * @link https://api.wordpress.org/secret-key/1.1/salt/ Create secrets for wp-config.php
1323 *
1324 * @param string $scheme Authentication scheme (auth, secure_auth, logged_in, nonce)
1325 * @return string Salt value
1326 */
1327function wp_salt( $scheme = 'auth' ) {
1328	static $cached_salts = array();
1329	if ( isset( $cached_salts[ $scheme ] ) )
1330		return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme );
1331
1332	static $duplicated_keys;
1333	if ( null === $duplicated_keys ) {
1334		$duplicated_keys = array( 'put your unique phrase here' => true );
1335		foreach ( array( 'AUTH', 'SECURE_AUTH', 'LOGGED_IN', 'NONCE', 'SECRET' ) as $first ) {
1336			foreach ( array( 'KEY', 'SALT' ) as $second ) {
1337				if ( ! defined( "{$first}_{$second}" ) )
1338					continue;
1339				$value = constant( "{$first}_{$second}" );
1340				$duplicated_keys[ $value ] = isset( $duplicated_keys[ $value ] );
1341			}
1342		}
1343	}
1344
1345	$key = $salt = '';
1346	if ( defined( 'SECRET_KEY' ) && SECRET_KEY && empty( $duplicated_keys[ SECRET_KEY ] ) )
1347		$key = SECRET_KEY;
1348	if ( 'auth' == $scheme && defined( 'SECRET_SALT' ) && SECRET_SALT && empty( $duplicated_keys[ SECRET_SALT ] ) )
1349		$salt = SECRET_SALT;
1350
1351	if ( in_array( $scheme, array( 'auth', 'secure_auth', 'logged_in', 'nonce' ) ) ) {
1352		foreach ( array( 'key', 'salt' ) as $type ) {
1353			$const = strtoupper( "{$scheme}_{$type}" );
1354			if ( defined( $const ) && constant( $const ) && empty( $duplicated_keys[ constant( $const ) ] ) ) {
1355				$$type = constant( $const );
1356			} elseif ( ! $$type ) {
1357				$$type = get_site_option( "{$scheme}_{$type}" );
1358				if ( ! $$type ) {
1359					$$type = wp_generate_password( 64, true, true );
1360					update_site_option( "{$scheme}_{$type}", $$type );
1361				}
1362			}
1363		}
1364	} else {
1365		if ( ! $key ) {
1366			$key = get_site_option( 'secret_key' );
1367			if ( ! $key ) {
1368				$key = wp_generate_password( 64, true, true );
1369				update_site_option( 'secret_key', $key );
1370			}
1371		}
1372		$salt = hash_hmac( 'md5', $scheme, $key );
1373	}
1374
1375	$cached_salts[ $scheme ] = $key . $salt;
1376	return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme );
1377}
1378endif;
1379
1380if ( !function_exists('wp_hash') ) :
1381/**
1382 * Get hash of given string.
1383 *
1384 * @since 2.0.3
1385 * @uses wp_salt() Get WordPress salt
1386 *
1387 * @param string $data Plain text to hash
1388 * @return string Hash of $data
1389 */
1390function wp_hash($data, $scheme = 'auth') {
1391	$salt = wp_salt($scheme);
1392
1393	return hash_hmac('md5', $data, $salt);
1394}
1395endif;
1396
1397if ( !function_exists('wp_hash_password') ) :
1398/**
1399 * Create a hash (encrypt) of a plain text password.
1400 *
1401 * For integration with other applications, this function can be overwritten to
1402 * instead use the other package password checking algorithm.
1403 *
1404 * @since 2.5
1405 * @global object $wp_hasher PHPass object
1406 * @uses PasswordHash::HashPassword
1407 *
1408 * @param string $password Plain text user password to hash
1409 * @return string The hash string of the password
1410 */
1411function wp_hash_password($password) {
1412	global $wp_hasher;
1413
1414	if ( empty($wp_hasher) ) {
1415		require_once( ABSPATH . 'wp-includes/class-phpass.php');
1416		// By default, use the portable hash from phpass
1417		$wp_hasher = new PasswordHash(8, true);
1418	}
1419
1420	return $wp_hasher->HashPassword($password);
1421}
1422endif;
1423
1424if ( !function_exists('wp_check_password') ) :
1425/**
1426 * Checks the plaintext password against the encrypted Password.
1427 *
1428 * Maintains compatibility between old version and the new cookie authentication
1429 * protocol using PHPass library. The $hash parameter is the encrypted password
1430 * and the function compares the plain text password when encrypted similarly
1431 * against the already encrypted password to see if they match.
1432 *
1433 * For integration with other applications, this function can be overwritten to
1434 * instead use the other package password checking algorithm.
1435 *
1436 * @since 2.5
1437 * @global object $wp_hasher PHPass object used for checking the password
1438 *	against the $hash + $password
1439 * @uses PasswordHash::CheckPassword
1440 *
1441 * @param string $password Plaintext user's password
1442 * @param string $hash Hash of the user's password to check against.
1443 * @return bool False, if the $password does not match the hashed password
1444 */
1445function wp_check_password($password, $hash, $user_id = '') {
1446	global $wp_hasher;
1447
1448	// If the hash is still md5...
1449	if ( strlen($hash) <= 32 ) {
1450		$check = ( $hash == md5($password) );
1451		if ( $check && $user_id ) {
1452			// Rehash using new hash.
1453			wp_set_password($password, $user_id);
1454			$hash = wp_hash_password($password);
1455		}
1456
1457		return apply_filters('check_password', $check, $password, $hash, $user_id);
1458	}
1459
1460	// If the stored hash is longer than an MD5, presume the
1461	// new style phpass portable hash.
1462	if ( empty($wp_hasher) ) {
1463		require_once( ABSPATH . 'wp-includes/class-phpass.php');
1464		// By default, use the portable hash from phpass
1465		$wp_hasher = new PasswordHash(8, true);
1466	}
1467
1468	$check = $wp_hasher->CheckPassword($password, $hash);
1469
1470	return apply_filters('check_password', $check, $password, $hash, $user_id);
1471}
1472endif;
1473
1474if ( !function_exists('wp_generate_password') ) :
1475/**
1476 * Generates a random password drawn from the defined set of characters.
1477 *
1478 * @since 2.5
1479 *
1480 * @param int $length The length of password to generate
1481 * @param bool $special_chars Whether to include standard special characters. Default true.
1482 * @param bool $extra_special_chars Whether to include other special characters. Used when
1483 *   generating secret keys and salts. Default false.
1484 * @return string The random password
1485 **/
1486function wp_generate_password( $length = 12, $special_chars = true, $extra_special_chars = false ) {
1487	$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
1488	if ( $special_chars )
1489		$chars .= '!@#$%^&*()';
1490	if ( $extra_special_chars )
1491		$chars .= '-_ []{}<>~`+=,.;:/?|';
1492
1493	$password = '';
1494	for ( $i = 0; $i < $length; $i++ ) {
1495		$password .= substr($chars, wp_rand(0, strlen($chars) - 1), 1);
1496	}
1497
1498	// random_password filter was previously in random_password function which was deprecated
1499	return apply_filters('random_password', $password);
1500}
1501endif;
1502
1503if ( !function_exists('wp_rand') ) :
1504 /**
1505 * Generates a random number
1506 *
1507 * @since 2.6.2
1508 *
1509 * @param int $min Lower limit for the generated number (optional, default is 0)
1510 * @param int $max Upper limit for the generated number (optional, default is 4294967295)
1511 * @return int A random number between min and max
1512 */
1513function wp_rand( $min = 0, $max = 0 ) {
1514	global $rnd_value;
1515
1516	// Reset $rnd_value after 14 uses
1517	// 32(md5) + 40(sha1) + 40(sha1) / 8 = 14 random numbers from $rnd_value
1518	if ( strlen($rnd_value) < 8 ) {
1519		if ( defined( 'WP_SETUP_CONFIG' ) )
1520			static $seed = '';
1521		else
1522			$seed = get_transient('random_seed');
1523		$rnd_value = md5( uniqid(microtime() . mt_rand(), true ) . $seed );
1524		$rnd_value .= sha1($rnd_value);
1525		$rnd_value .= sha1($rnd_value . $seed);
1526		$seed = md5($seed . $rnd_value);
1527		if ( ! defined( 'WP_SETUP_CONFIG' ) )
1528			set_transient('random_seed', $seed);
1529	}
1530
1531	// Take the first 8 digits for our value
1532	$value = substr($rnd_value, 0, 8);
1533
1534	// Strip the first eight, leaving the remainder for the next call to wp_rand().
1535	$rnd_value = substr($rnd_value, 8);
1536
1537	$value = abs(hexdec($value));
1538
1539	// Reduce the value to be within the min - max range
1540	// 4294967295 = 0xffffffff = max random number
1541	if ( $max != 0 )
1542		$value = $min + (($max - $min + 1) * ($value / (4294967295 + 1)));
1543
1544	return abs(intval($value));
1545}
1546endif;
1547
1548if ( !function_exists('wp_set_password') ) :
1549/**
1550 * Updates the user's password with a new encrypted one.
1551 *
1552 * For integration with other applications, this function can be overwritten to
1553 * instead use the other package password checking algorithm.
1554 *
1555 * @since 2.5
1556 * @uses $wpdb WordPress database object for queries
1557 * @uses wp_hash_password() Used to encrypt the user's password before passing to the database
1558 *
1559 * @param string $password The plaintext new user password
1560 * @param int $user_id User ID
1561 */
1562function wp_set_password( $password, $user_id ) {
1563	global $wpdb;
1564
1565	$hash = wp_hash_password($password);
1566	$wpdb->update($wpdb->users, array('user_pass' => $hash, 'user_activation_key' => ''), array('ID' => $user_id) );
1567
1568	wp_cache_delete($user_id, 'users');
1569}
1570endif;
1571
1572if ( !function_exists( 'get_avatar' ) ) :
1573/**
1574 * Retrieve the avatar for a user who provided a user ID or email address.
1575 *
1576 * @since 2.5
1577 * @param int|string|object $id_or_email A user ID,  email address, or comment object
1578 * @param int $size Size of the avatar image
1579 * @param string $default URL to a default image to use if no avatar is available
1580 * @param string $alt Alternate text to use in image tag. Defaults to blank
1581 * @return string <img> tag for the user's avatar
1582*/
1583function get_avatar( $id_or_email, $size = '96', $default = '', $alt = false ) {
1584	if ( ! get_option('show_avatars') )
1585		return false;
1586
1587	if ( false === $alt)
1588		$safe_alt = '';
1589	else
1590		$safe_alt = esc_attr( $alt );
1591
1592	if ( !is_numeric($size) )
1593		$size = '96';
1594
1595	$email = '';
1596	if ( is_numeric($id_or_email) ) {
1597		$id = (int) $id_or_email;
1598		$user = get_userdata($id);
1599		if ( $user )
1600			$email = $user->user_email;
1601	} elseif ( is_object($id_or_email) ) {
1602		// No avatar for pingbacks or trackbacks
1603		$allowed_comment_types = apply_filters( 'get_avatar_comment_types', array( 'comment' ) );
1604		if ( ! empty( $id_or_email->comment_type ) && ! in_array( $id_or_email->comment_type, (array) $allowed_comment_types ) )
1605			return false;
1606
1607		if ( !empty($id_or_email->user_id) ) {
1608			$id = (int) $id_or_email->user_id;
1609			$user = get_userdata($id);
1610			if ( $user)
1611				$email = $user->user_email;
1612		} elseif ( !empty($id_or_email->comment_author_email) ) {
1613			$email = $id_or_email->comment_author_email;
1614		}
1615	} else {
1616		$email = $id_or_email;
1617	}
1618
1619	if ( empty($default) ) {
1620		$avatar_default = get_option('avatar_default');
1621		if ( empty($avatar_default) )
1622			$default = 'mystery';
1623		else
1624			$default = $avatar_default;
1625	}
1626
1627	if ( !empty($email) )
1628		$email_hash = md5( strtolower( trim( $email ) ) );
1629
1630	if ( is_ssl() ) {
1631		$host = 'https://secure.gravatar.com';
1632	} else {
1633		if ( !empty($email) )
1634			$host = sprintf( "http://%d.gravatar.com", ( hexdec( $email_hash[0] ) % 2 ) );
1635		else
1636			$host = 'http://0.gravatar.com';
1637	}
1638
1639	if ( 'mystery' == $default )
1640		$default = "$host/avatar/ad516503a11cd5ca435acc9bb6523536?s={$size}"; // ad516503a11cd5ca435acc9bb6523536 == md5('unknown@gravatar.com')
1641	elseif ( 'blank' == $default )
1642		$default = includes_url('images/blank.gif');
1643	elseif ( !empty($email) && 'gravatar_default' == $default )
1644		$default = '';
1645	elseif ( 'gravatar_default' == $default )
1646		$default = "$host/avatar/?s={$size}";
1647	elseif ( empty($email) )
1648		$default = "$host/avatar/?d=$default&amp;s={$size}";
1649	elseif ( strpos($default, 'http://') === 0 )
1650		$default = add_query_arg( 's', $size, $default );
1651
1652	if ( !empty($email) ) {
1653		$out = "$host/avatar/";
1654		$out .= $email_hash;
1655		$out .= '?s='.$size;
1656		$out .= '&amp;d=' . urlencode( $default );
1657
1658		$rating = get_option('avatar_rating');
1659		if ( !empty( $rating ) )
1660			$out .= "&amp;r={$rating}";
1661
1662		$avatar = "<img alt='{$safe_alt}' src='{$out}' class='avatar avatar-{$size} photo' height='{$size}' width='{$size}' />";
1663	} else {
1664		$avatar = "<img alt='{$safe_alt}' src='{$default}' class='avatar avatar-{$size} photo avatar-default' height='{$size}' width='{$size}' />";
1665	}
1666
1667	return apply_filters('get_avatar', $avatar, $id_or_email, $size, $default, $alt);
1668}
1669endif;
1670
1671if ( !function_exists( 'wp_text_diff' ) ) :
1672/**
1673 * Displays a human readable HTML representation of the difference between two strings.
1674 *
1675 * The Diff is available for getting the changes between versions. The output is
1676 * HTML, so the primary use is for displaying the changes. If the two strings
1677 * are equivalent, then an empty string will be returned.
1678 *
1679 * The arguments supported and can be changed are listed below.
1680 *
1681 * 'title' : Default is an empty string. Titles the diff in a manner compatible
1682 *		with the output.
1683 * 'title_left' : Default is an empty string. Change the HTML to the left of the
1684 *		title.
1685 * 'title_right' : Default is an empty string. Change the HTML to the right of
1686 *		the title.
1687 *
1688 * @since 2.6
1689 * @see wp_parse_args() Used to change defaults to user defined settings.
1690 * @uses Text_Diff
1691 * @uses WP_Text_Diff_Renderer_Table
1692 *
1693 * @param string $left_string "old" (left) version of string
1694 * @param string $right_string "new" (right) version of string
1695 * @param string|array $args Optional. Change 'title', 'title_left', and 'title_right' defaults.
1696 * @return string Empty string if strings are equivalent or HTML with differences.
1697 */
1698function wp_text_diff( $left_string, $right_string, $args = null ) {
1699	$defaults = array( 'title' => '', 'title_left' => '', 'title_right' => '' );
1700	$args = wp_parse_args( $args, $defaults );
1701
1702	if ( !class_exists( 'WP_Text_Diff_Renderer_Table' ) )
1703		require( ABSPATH . WPINC . '/wp-diff.php' );
1704
1705	$left_string  = normalize_whitespace($left_string);
1706	$right_string = normalize_whitespace($right_string);
1707
1708	$left_lines  = explode("\n", $left_string);
1709	$right_lines = explode("\n", $right_string);
1710
1711	$text_diff = new Text_Diff($left_lines, $right_lines);
1712	$renderer  = new WP_Text_Diff_Renderer_Table();
1713	$diff = $renderer->render($text_diff);
1714
1715	if ( !$diff )
1716		return '';
1717
1718	$r  = "<table class='diff'>\n";
1719	$r .= "<col class='ltype' /><col class='content' /><col class='ltype' /><col class='content' />";
1720
1721	if ( $args['title'] || $args['title_left'] || $args['title_right'] )
1722		$r .= "<thead>";
1723	if ( $args['title'] )
1724		$r .= "<tr class='diff-title'><th colspan='4'>$args[title]</th></tr>\n";
1725	if ( $args['title_left'] || $args['title_right'] ) {
1726		$r .= "<tr class='diff-sub-title'>\n";
1727		$r .= "\t<td></td><th>$args[title_left]</th>\n";
1728		$r .= "\t<td></td><th>$args[title_right]</th>\n";
1729		$r .= "</tr>\n";
1730	}
1731	if ( $args['title'] || $args['title_left'] || $args['title_right'] )
1732		$r .= "</thead>\n";
1733
1734	$r .= "<tbody>\n$diff\n</tbody>\n";
1735	$r .= "</table>";
1736
1737	return $r;
1738}
1739endif;
1740<?php
1741/**
1742 * These functions can be replaced via plugins. If plugins do not redefine these
1743 * functions, then these will be used instead.
1744 *
1745 * @package WordPress
1746 */
1747
1748if ( !function_exists('wp_set_current_user') ) :
1749/**
1750 * Changes the current user by ID or name.
1751 *
1752 * Set $id to null and specify a name if you do not know a user's ID.
1753 *
1754 * Some WordPress functionality is based on the current user and not based on
1755 * the signed in user. Therefore, it opens the ability to edit and perform
1756 * actions on users who aren't signed in.
1757 *
1758 * @since 2.0.3
1759 * @global object $current_user The current user object which holds the user data.
1760 * @uses do_action() Calls 'set_current_user' hook after setting the current user.
1761 *
1762 * @param int $id User ID
1763 * @param string $name User's username
1764 * @return WP_User Current user User object
1765 */
1766function wp_set_current_user($id, $name = '') {
1767	global $current_user;
1768
1769	if ( isset( $current_user ) && ( $current_user instanceof WP_User ) && ( $id == $current_user->ID ) )
1770		return $current_user;
1771
1772	$current_user = new WP_User( $id, $name );
1773
1774	setup_userdata( $current_user->ID );
1775
1776	do_action('set_current_user');
1777
1778	return $current_user;
1779}
1780endif;
1781
1782if ( !function_exists('wp_get_current_user') ) :
1783/**
1784 * Retrieve the current user object.
1785 *
1786 * @since 2.0.3
1787 *
1788 * @return WP_User Current user WP_User object
1789 */
1790function wp_get_current_user() {
1791	global $current_user;
1792
1793	get_currentuserinfo();
1794
1795	return $current_user;
1796}
1797endif;
1798
1799if ( !function_exists('get_currentuserinfo') ) :
1800/**
1801 * Populate global variables with information about the currently logged in user.
1802 *
1803 * Will set the current user, if the current user is not set. The current user
1804 * will be set to the logged in person. If no user is logged in, then it will
1805 * set the current user to 0, which is invalid and won't have any permissions.
1806 *
1807 * @since 0.71
1808 * @uses $current_user Checks if the current user is set
1809 * @uses wp_validate_auth_cookie() Retrieves current logged in user.
1810 *
1811 * @return bool|null False on XMLRPC Request and invalid auth cookie. Null when current user set
1812 */
1813function get_currentuserinfo() {
1814	global $current_user;
1815
1816	if ( ! empty( $current_user ) ) {
1817		if ( $current_user instanceof WP_User )
1818			return;
1819
1820		// Upgrade stdClass to WP_User
1821		if ( is_object( $current_user ) && isset( $current_user->ID ) ) {
1822			$cur_id = $current_user->ID;
1823			$current_user = null;
1824			wp_set_current_user( $cur_id );
1825			return;
1826		}
1827
1828		// $current_user has a junk value. Force to WP_User with ID 0.
1829		$current_user = null;
1830		wp_set_current_user( 0 );
1831		return false;
1832	}
1833
1834	if ( defined('XMLRPC_REQUEST') && XMLRPC_REQUEST ) {
1835		wp_set_current_user( 0 );
1836		return false;
1837	}
1838
1839	if ( ! $user = wp_validate_auth_cookie() ) {
1840		 if ( is_blog_admin() || is_network_admin() || empty( $_COOKIE[LOGGED_IN_COOKIE] ) || !$user = wp_validate_auth_cookie( $_COOKIE[LOGGED_IN_COOKIE], 'logged_in' ) ) {
1841		 	wp_set_current_user( 0 );
1842		 	return false;
1843		 }
1844	}
1845
1846	wp_set_current_user( $user );
1847}
1848endif;
1849
1850if ( !function_exists('get_userdata') ) :
1851/**
1852 * Retrieve user info by user ID.
1853 *
1854 * @since 0.71
1855 *
1856 * @param int $user_id User ID
1857 * @return bool|object False on failure, WP_User object on success
1858 */
1859function get_userdata( $user_id ) {
1860	return get_user_by( 'id', $user_id );
1861}
1862endif;
1863
1864if ( !function_exists('get_user_by') ) :
1865/**
1866 * Retrieve user info by a given field
1867 *
1868 * @since 2.8.0
1869 *
1870 * @param string $field The field to retrieve the user with. id | slug | email | login
1871 * @param int|string $value A value for $field. A user ID, slug, email address, or login name.
1872 * @return bool|object False on failure, WP_User object on success
1873 */
1874function get_user_by( $field, $value ) {
1875	$userdata = WP_User::get_data_by( $field, $value );
1876
1877	if ( !$userdata )
1878		return false;
1879
1880	$user = new WP_User;
1881	$user->init( $userdata );
1882
1883	return $user;
1884}
1885endif;
1886
1887if ( !function_exists('cache_users') ) :
1888/**
1889 * Retrieve info for user lists to prevent multiple queries by get_userdata()
1890 *
1891 * @since 3.0.0
1892 *
1893 * @param array $user_ids User ID numbers list
1894 */
1895function cache_users( $user_ids ) {
1896	global $wpdb;
1897
1898	$clean = _get_non_cached_ids( $user_ids, 'users' );
1899
1900	if ( empty( $clean ) )
1901		return;
1902
1903	$list = implode( ',', $clean );
1904
1905	$users = $wpdb->get_results( "SELECT * FROM $wpdb->users WHERE ID IN ($list)" );
1906
1907	$ids = array();
1908	foreach ( $users as $user ) {
1909		update_user_caches( $user );
1910		$ids[] = $user->ID;
1911	}
1912	update_meta_cache( 'user', $ids );
1913}
1914endif;
1915
1916if ( !function_exists( 'wp_mail' ) ) :
1917/**
1918 * Send mail, similar to PHP's mail
1919 *
1920 * A true return value does not automatically mean that the user received the
1921 * email successfully. It just only means that the method used was able to
1922 * process the request without any errors.
1923 *
1924 * Using the two 'wp_mail_from' and 'wp_mail_from_name' hooks allow from
1925 * creating a from address like 'Name <email@address.com>' when both are set. If
1926 * just 'wp_mail_from' is set, then just the email address will be used with no
1927 * name.
1928 *
1929 * The default content type is 'text/plain' which does not allow using HTML.
1930 * However, you can set the content type of the email by using the
1931 * 'wp_mail_content_type' filter.
1932 *
1933 * The default charset is based on the charset used on the blog. The charset can
1934 * be set using the 'wp_mail_charset' filter.
1935 *
1936 * @since 1.2.1
1937 * @uses apply_filters() Calls 'wp_mail' hook on an array of all of the parameters.
1938 * @uses apply_filters() Calls 'wp_mail_from' hook to get the from email address.
1939 * @uses apply_filters() Calls 'wp_mail_from_name' hook to get the from address name.
1940 * @uses apply_filters() Calls 'wp_mail_content_type' hook to get the email content type.
1941 * @uses apply_filters() Calls 'wp_mail_charset' hook to get the email charset
1942 * @uses do_action_ref_array() Calls 'phpmailer_init' hook on the reference to
1943 *		phpmailer object.
1944 * @uses PHPMailer
1945 *
1946 * @param string|array $to Array or comma-separated list of email addresses to send message.
1947 * @param string $subject Email subject
1948 * @param string $message Message contents
1949 * @param string|array $headers Optional. Additional headers.
1950 * @param string|array $attachments Optional. Files to attach.
1951 * @return bool Whether the email contents were sent successfully.
1952 */
1953function wp_mail( $to, $subject, $message, $headers = '', $attachments = array() ) {
1954	// Compact the input, apply the filters, and extract them back out
1955	extract( apply_filters( 'wp_mail', compact( 'to', 'subject', 'message', 'headers', 'attachments' ) ) );
1956
1957	if ( !is_array($attachments) )
1958		$attachments = explode( "\n", str_replace( "\r\n", "\n", $attachments ) );
1959
1960	global $phpmailer;
1961
1962	// (Re)create it, if it's gone missing
1963	if ( !is_object( $phpmailer ) || !is_a( $phpmailer, 'PHPMailer' ) ) {
1964		require_once ABSPATH . WPINC . '/class-phpmailer.php';
1965		require_once ABSPATH . WPINC . '/class-smtp.php';
1966		$phpmailer = new PHPMailer( true );
1967	}
1968
1969	// Headers
1970	if ( empty( $headers ) ) {
1971		$headers = array();
1972	} else {
1973		if ( !is_array( $headers ) ) {
1974			// Explode the headers out, so this function can take both
1975			// string headers and an array of headers.
1976			$tempheaders = explode( "\n", str_replace( "\r\n", "\n", $headers ) );
1977		} else {
1978			$tempheaders = $headers;
1979		}
1980		$headers = array();
1981		$cc = array();
1982		$bcc = array();
1983
1984		// If it's actually got contents
1985		if ( !empty( $tempheaders ) ) {
1986			// Iterate through the raw headers
1987			foreach ( (array) $tempheaders as $header ) {
1988				if ( strpos($header, ':') === false ) {
1989					if ( false !== stripos( $header, 'boundary=' ) ) {
1990						$parts = preg_split('/boundary=/i', trim( $header ) );
1991						$boundary = trim( str_replace( array( "'", '"' ), '', $parts[1] ) );
1992					}
1993					continue;
1994				}
1995				// Explode them out
1996				list( $name, $content ) = explode( ':', trim( $header ), 2 );
1997
1998				// Cleanup crew
1999				$name    = trim( $name    );
2000				$content = trim( $content );
2001
2002				switch ( strtolower( $name ) ) {
2003					// Mainly for legacy -- process a From: header if it's there
2004					case 'from':
2005						if ( strpos($content, '<' ) !== false ) {
2006							// So... making my life hard again?
2007							$from_name = substr( $content, 0, strpos( $content, '<' ) - 1 );
2008							$from_name = str_replace( '"', '', $from_name );
2009							$from_name = trim( $from_name );
2010
2011							$from_email = substr( $content, strpos( $content, '<' ) + 1 );
2012							$from_email = str_replace( '>', '', $from_email );
2013							$from_email = trim( $from_email );
2014						} else {
2015							$from_email = trim( $content );
2016						}
2017						break;
2018					case 'content-type':
2019						if ( strpos( $content, ';' ) !== false ) {
2020							list( $type, $charset ) = explode( ';', $content );
2021							$content_type = trim( $type );
2022							if ( false !== stripos( $charset, 'charset=' ) ) {
2023								$charset = trim( str_replace( array( 'charset=', '"' ), '', $charset ) );
2024							} elseif ( false !== stripos( $charset, 'boundary=' ) ) {
2025								$boundary = trim( str_replace( array( 'BOUNDARY=', 'boundary=', '"' ), '', $charset ) );
2026								$charset = '';
2027							}
2028						} else {
2029							$content_type = trim( $content );
2030						}
2031						break;
2032					case 'cc':
2033						$cc = array_merge( (array) $cc, explode( ',', $content ) );
2034						break;
2035					case 'bcc':
2036						$bcc = array_merge( (array) $bcc, explode( ',', $content ) );
2037						break;
2038					default:
2039						// Add it to our grand headers array
2040						$headers[trim( $name )] = trim( $content );
2041						break;
2042				}
2043			}
2044		}
2045	}
2046
2047	// Empty out the values that may be set
2048	$phpmailer->ClearAddresses();
2049	$phpmailer->ClearAllRecipients();
2050	$phpmailer->ClearAttachments();
2051	$phpmailer->ClearBCCs();
2052	$phpmailer->ClearCCs();
2053	$phpmailer->ClearCustomHeaders();
2054	$phpmailer->ClearReplyTos();
2055
2056	// From email and name
2057	// If we don't have a name from the input headers
2058	if ( !isset( $from_name ) )
2059		$from_name = 'WordPress';
2060
2061	/* If we don't have an email from the input headers default to wordpress@$sitename
2062	 * Some hosts will block outgoing mail from this address if it doesn't exist but
2063	 * there's no easy alternative. Defaulting to admin_email might appear to be another
2064	 * option but some hosts may refuse to relay mail from an unknown domain. See
2065	 * http://trac.wordpress.org/ticket/5007.
2066	 */
2067
2068	if ( !isset( $from_email ) ) {
2069		// Get the site domain and get rid of www.
2070		$sitename = strtolower( $_SERVER['SERVER_NAME'] );
2071		if ( substr( $sitename, 0, 4 ) == 'www.' ) {
2072			$sitename = substr( $sitename, 4 );
2073		}
2074
2075		$from_email = 'wordpress@' . $sitename;
2076	}
2077
2078	// Plugin authors can override the potentially troublesome default
2079	$phpmailer->From     = apply_filters( 'wp_mail_from'     , $from_email );
2080	$phpmailer->FromName = apply_filters( 'wp_mail_from_name', $from_name  );
2081
2082	// Set destination addresses
2083	if ( !is_array( $to ) )
2084		$to = explode( ',', $to );
2085
2086	foreach ( (array) $to as $recipient ) {
2087		try {
2088			// Break $recipient into name and address parts if in the format "Foo <bar@baz.com>"
2089			$recipient_name = '';
2090			if( preg_match( '/(.*)<(.+)>/', $recipient, $matches ) ) {
2091				if ( count( $matches ) == 3 ) {
2092					$recipient_name = $matches[1];
2093					$recipient = $matches[2];
2094				}
2095			}
2096			$phpmailer->AddAddress( $recipient, $recipient_name);
2097		} catch ( phpmailerException $e ) {
2098			continue;
2099		}
2100	}
2101
2102	// Set mail's subject and body
2103	$phpmailer->Subject = $subject;
2104	$phpmailer->Body    = $message;
2105
2106	// Add any CC and BCC recipients
2107	if ( !empty( $cc ) ) {
2108		foreach ( (array) $cc as $recipient ) {
2109			try {
2110				// Break $recipient into name and address parts if in the format "Foo <bar@baz.com>"
2111				$recipient_name = '';
2112				if( preg_match( '/(.*)<(.+)>/', $recipient, $matches ) ) {
2113					if ( count( $matches ) == 3 ) {
2114						$recipient_name = $matches[1];
2115						$recipient = $matches[2];
2116					}
2117				}
2118				$phpmailer->AddCc( $recipient, $recipient_name );
2119			} catch ( phpmailerException $e ) {
2120				continue;
2121			}
2122		}
2123	}
2124
2125	if ( !empty( $bcc ) ) {
2126		foreach ( (array) $bcc as $recipient) {
2127			try {
2128				// Break $recipient into name and address parts if in the format "Foo <bar@baz.com>"
2129				$recipient_name = '';
2130				if( preg_match( '/(.*)<(.+)>/', $recipient, $matches ) ) {
2131					if ( count( $matches ) == 3 ) {
2132						$recipient_name = $matches[1];
2133						$recipient = $matches[2];
2134					}
2135				}
2136				$phpmailer->AddBcc( $recipient, $recipient_name );
2137			} catch ( phpmailerException $e ) {
2138				continue;
2139			}
2140		}
2141	}
2142
2143	// Set to use PHP's mail()
2144	$phpmailer->IsMail();
2145
2146	// Set Content-Type and charset
2147	// If we don't have a content-type from the input headers
2148	if ( !isset( $content_type ) )
2149		$content_type = 'text/plain';
2150
2151	$content_type = apply_filters( 'wp_mail_content_type', $content_type );
2152
2153	$phpmailer->ContentType = $content_type;
2154
2155	// Set whether it's plaintext, depending on $content_type
2156	if ( 'text/html' == $content_type )
2157		$phpmailer->IsHTML( true );
2158
2159	// If we don't have a charset from the input headers
2160	if ( !isset( $charset ) )
2161		$charset = get_bloginfo( 'charset' );
2162
2163	// Set the content-type and charset
2164	$phpmailer->CharSet = apply_filters( 'wp_mail_charset', $charset );
2165
2166	// Set custom headers
2167	if ( !empty( $headers ) ) {
2168		foreach( (array) $headers as $name => $content ) {
2169			$phpmailer->AddCustomHeader( sprintf( '%1$s: %2$s', $name, $content ) );
2170		}
2171
2172		if ( false !== stripos( $content_type, 'multipart' ) && ! empty($boundary) )
2173			$phpmailer->AddCustomHeader( sprintf( "Content-Type: %s;\n\t boundary=\"%s\"", $content_type, $boundary ) );
2174	}
2175
2176	if ( !empty( $attachments ) ) {
2177		foreach ( $attachments as $attachment ) {
2178			try {
2179				$phpmailer->AddAttachment($attachment);
2180			} catch ( phpmailerException $e ) {
2181				continue;
2182			}
2183		}
2184	}
2185
2186	do_action_ref_array( 'phpmailer_init', array( &$phpmailer ) );
2187
2188	// Send!
2189	try {
2190		$phpmailer->Send();
2191	} catch ( phpmailerException $e ) {
2192		return false;
2193	}
2194
2195	return true;
2196}
2197endif;
2198
2199if ( !function_exists('wp_authenticate') ) :
2200/**
2201 * Checks a user's login information and logs them in if it checks out.
2202 *
2203 * @since 2.5.0
2204 *
2205 * @param string $username User's username
2206 * @param string $password User's password
2207 * @return WP_Error|WP_User WP_User object if login successful, otherwise WP_Error object.
2208 */
2209function wp_authenticate($username, $password) {
2210	$username = sanitize_user($username);
2211	$password = trim($password);
2212
2213	$user = apply_filters('authenticate', null, $username, $password);
2214
2215	if ( $user == null ) {
2216		// TODO what should the error message be? (Or would these even happen?)
2217		// Only needed if all authentication handlers fail to return anything.
2218		$user = new WP_Error('authentication_failed', __('<strong>ERROR</strong>: Invalid username or incorrect password.'));
2219	}
2220
2221	$ignore_codes = array('empty_username', 'empty_password');
2222
2223	if (is_wp_error($user) && !in_array($user->get_error_code(), $ignore_codes) ) {
2224		do_action('wp_login_failed', $username);
2225	}
2226
2227	return $user;
2228}
2229endif;
2230
2231if ( !function_exists('wp_logout') ) :
2232/**
2233 * Log the current user out.
2234 *
2235 * @since 2.5.0
2236 */
2237function wp_logout() {
2238	wp_clear_auth_cookie();
2239	do_action('wp_logout');
2240}
2241endif;
2242
2243if ( !function_exists('wp_validate_auth_cookie') ) :
2244/**
2245 * Validates authentication cookie.
2246 *
2247 * The checks include making sure that the authentication cookie is set and
2248 * pulling in the contents (if $cookie is not used).
2249 *
2250 * Makes sure the cookie is not expired. Verifies the hash in cookie is what is
2251 * should be and compares the two.
2252 *
2253 * @since 2.5
2254 *
2255 * @param string $cookie Optional. If used, will validate contents instead of cookie's
2256 * @param string $scheme Optional. The cookie scheme to use: auth, secure_auth, or logged_in
2257 * @return bool|int False if invalid cookie, User ID if valid.
2258 */
2259function wp_validate_auth_cookie($cookie = '', $scheme = '') {
2260	if ( ! $cookie_elements = wp_parse_auth_cookie($cookie, $scheme) ) {
2261		do_action('auth_cookie_malformed', $cookie, $scheme);
2262		return false;
2263	}
2264
2265	extract($cookie_elements, EXTR_OVERWRITE);
2266
2267	$expired = $expiration;
2268
2269	// Allow a grace period for POST and AJAX requests
2270	if ( defined('DOING_AJAX') || 'POST' == $_SERVER['REQUEST_METHOD'] )
2271		$expired += 3600;
2272
2273	// Quick check to see if an honest cookie has expired
2274	if ( $expired < time() ) {
2275		do_action('auth_cookie_expired', $cookie_elements);
2276		return false;
2277	}
2278
2279	$user = get_user_by('login', $username);
2280	if ( ! $user ) {
2281		do_action('auth_cookie_bad_username', $cookie_elements);
2282		return false;
2283	}
2284
2285	$pass_frag = substr($user->user_pass, 8, 4);
2286
2287	$key = wp_hash($username . $pass_frag . '|' . $expiration, $scheme);
2288	$hash = hash_hmac('md5', $username . '|' . $expiration, $key);
2289
2290	if ( $hmac != $hash ) {
2291		do_action('auth_cookie_bad_hash', $cookie_elements);
2292		return false;
2293	}
2294
2295	if ( $expiration < time() ) // AJAX/POST grace period set above
2296		$GLOBALS['login_grace_period'] = 1;
2297
2298	do_action('auth_cookie_valid', $cookie_elements, $user);
2299
2300	return $user->ID;
2301}
2302endif;
2303
2304if ( !function_exists('wp_generate_auth_cookie') ) :
2305/**
2306 * Generate authentication cookie contents.
2307 *
2308 * @since 2.5
2309 * @uses apply_filters() Calls 'auth_cookie' hook on $cookie contents, User ID
2310 *		and expiration of cookie.
2311 *
2312 * @param int $user_id User ID
2313 * @param int $expiration Cookie expiration in seconds
2314 * @param string $scheme Optional. The cookie scheme to use: auth, secure_auth, or logged_in
2315 * @return string Authentication cookie contents
2316 */
2317function wp_generate_auth_cookie($user_id, $expiration, $scheme = 'auth') {
2318	$user = get_userdata($user_id);
2319
2320	$pass_frag = substr($user->user_pass, 8, 4);
2321
2322	$key = wp_hash($user->user_login . $pass_frag . '|' . $expiration, $scheme);
2323	$hash = hash_hmac('md5', $user->user_login . '|' . $expiration, $key);
2324
2325	$cookie = $user->user_login . '|' . $expiration . '|' . $hash;
2326
2327	return apply_filters('auth_cookie', $cookie, $user_id, $expiration, $scheme);
2328}
2329endif;
2330
2331if ( !function_exists('wp_parse_auth_cookie') ) :
2332/**
2333 * Parse a cookie into its components
2334 *
2335 * @since 2.7
2336 *
2337 * @param string $cookie
2338 * @param string $scheme Optional. The cookie scheme to use: auth, secure_auth, or logged_in
2339 * @return array Authentication cookie components
2340 */
2341function wp_parse_auth_cookie($cookie = '', $scheme = '') {
2342	if ( empty($cookie) ) {
2343		switch ($scheme){
2344			case 'auth':
2345				$cookie_name = AUTH_COOKIE;
2346				break;
2347			case 'secure_auth':
2348				$cookie_name = SECURE_AUTH_COOKIE;
2349				break;
2350			case "logged_in":
2351				$cookie_name = LOGGED_IN_COOKIE;
2352				break;
2353			default:
2354				if ( is_ssl() ) {
2355					$cookie_name = SECURE_AUTH_COOKIE;
2356					$scheme = 'secure_auth';
2357				} else {
2358					$cookie_name = AUTH_COOKIE;
2359					$scheme = 'auth';
2360				}
2361	    }
2362
2363		if ( empty($_COOKIE[$cookie_name]) )
2364			return false;
2365		$cookie = $_COOKIE[$cookie_name];
2366	}
2367
2368	$cookie_elements = explode('|', $cookie);
2369	if ( count($cookie_elements) != 3 )
2370		return false;
2371
2372	list($username, $expiration, $hmac) = $cookie_elements;
2373
2374	return compact('username', 'expiration', 'hmac', 'scheme');
2375}
2376endif;
2377
2378if ( !function_exists('wp_set_auth_cookie') ) :
2379/**
2380 * Sets the authentication cookies based User ID.
2381 *
2382 * The $remember parameter increases the time that the cookie will be kept. The
2383 * default the cookie is kept without remembering is two days. When $remember is
2384 * set, the cookies will be kept for 14 days or two weeks.
2385 *
2386 * @since 2.5
2387 *
2388 * @param int $user_id User ID
2389 * @param bool $remember Whether to remember the user
2390 */
2391function wp_set_auth_cookie($user_id, $remember = false, $secure = '') {
2392	if ( $remember ) {
2393		$expiration = $expire = time() + apply_filters('auth_cookie_expiration', 1209600, $user_id, $remember);
2394	} else {
2395		$expiration = time() + apply_filters('auth_cookie_expiration', 172800, $user_id, $remember);
2396		$expire = 0;
2397	}
2398
2399	if ( '' === $secure )
2400		$secure = is_ssl();
2401
2402	$secure = apply_filters('secure_auth_cookie', $secure, $user_id);
2403	$secure_logged_in_cookie = apply_filters('secure_logged_in_cookie', false, $user_id, $secure);
2404
2405	if ( $secure ) {
2406		$auth_cookie_name = SECURE_AUTH_COOKIE;
2407		$scheme = 'secure_auth';
2408	} else {
2409		$auth_cookie_name = AUTH_COOKIE;
2410		$scheme = 'auth';
2411	}
2412
2413	$auth_cookie = wp_generate_auth_cookie($user_id, $expiration, $scheme);
2414	$logged_in_cookie = wp_generate_auth_cookie($user_id, $expiration, 'logged_in');
2415
2416	do_action('set_auth_cookie', $auth_cookie, $expire, $expiration, $user_id, $scheme);
2417	do_action('set_logged_in_cookie', $logged_in_cookie, $expire, $expiration, $user_id, 'logged_in');
2418
2419	setcookie($auth_cookie_name, $auth_cookie, $expire, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN, $secure, true);
2420	setcookie($auth_cookie_name, $auth_cookie, $expire, ADMIN_COOKIE_PATH, COOKIE_DOMAIN, $secure, true);
2421	setcookie(LOGGED_IN_COOKIE, $logged_in_cookie, $expire, COOKIEPATH, COOKIE_DOMAIN, $secure_logged_in_cookie, true);
2422	if ( COOKIEPATH != SITECOOKIEPATH )
2423		setcookie(LOGGED_IN_COOKIE, $logged_in_cookie, $expire, SITECOOKIEPATH, COOKIE_DOMAIN, $secure_logged_in_cookie, true);
2424}
2425endif;
2426
2427if ( !function_exists('wp_clear_auth_cookie') ) :
2428/**
2429 * Removes all of the cookies associated with authentication.
2430 *
2431 * @since 2.5
2432 */
2433function wp_clear_auth_cookie() {
2434	do_action('clear_auth_cookie');
2435
2436	setcookie(AUTH_COOKIE, ' ', time() - 31536000, ADMIN_COOKIE_PATH, COOKIE_DOMAIN);
2437	setcookie(SECURE_AUTH_COOKIE, ' ', time() - 31536000, ADMIN_COOKIE_PATH, COOKIE_DOMAIN);
2438	setcookie(AUTH_COOKIE, ' ', time() - 31536000, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN);
2439	setcookie(SECURE_AUTH_COOKIE, ' ', time() - 31536000, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN);
2440	setcookie(LOGGED_IN_COOKIE, ' ', time() - 31536000, COOKIEPATH, COOKIE_DOMAIN);
2441	setcookie(LOGGED_IN_COOKIE, ' ', time() - 31536000, SITECOOKIEPATH, COOKIE_DOMAIN);
2442
2443	// Old cookies
2444	setcookie(AUTH_COOKIE, ' ', time() - 31536000, COOKIEPATH, COOKIE_DOMAIN);
2445	setcookie(AUTH_COOKIE, ' ', time() - 31536000, SITECOOKIEPATH, COOKIE_DOMAIN);
2446	setcookie(SECURE_AUTH_COOKIE, ' ', time() - 31536000, COOKIEPATH, COOKIE_DOMAIN);
2447	setcookie(SECURE_AUTH_COOKIE, ' ', time() - 31536000, SITECOOKIEPATH, COOKIE_DOMAIN);
2448
2449	// Even older cookies
2450	setcookie(USER_COOKIE, ' ', time() - 31536000, COOKIEPATH, COOKIE_DOMAIN);
2451	setcookie(PASS_COOKIE, ' ', time() - 31536000, COOKIEPATH, COOKIE_DOMAIN);
2452	setcookie(USER_COOKIE, ' ', time() - 31536000, SITECOOKIEPATH, COOKIE_DOMAIN);
2453	setcookie(PASS_COOKIE, ' ', time() - 31536000, SITECOOKIEPATH, COOKIE_DOMAIN);
2454}
2455endif;
2456
2457if ( !function_exists('is_user_logged_in') ) :
2458/**
2459 * Checks if the current visitor is a logged in user.
2460 *
2461 * @since 2.0.0
2462 *
2463 * @return bool True if user is logged in, false if not logged in.
2464 */
2465function is_user_logged_in() {
2466	$user = wp_get_current_user();
2467
2468	if ( ! $user->exists() )
2469		return false;
2470
2471	return true;
2472}
2473endif;
2474
2475if ( !function_exists('auth_redirect') ) :
2476/**
2477 * Checks if a user is logged in, if not it redirects them to the login page.
2478 *
2479 * @since 1.5
2480 */
2481function auth_redirect() {
2482	// Checks if a user is logged in, if not redirects them to the login page
2483
2484	$secure = ( is_ssl() || force_ssl_admin() );
2485
2486	$secure = apply_filters('secure_auth_redirect', $secure);
2487
2488	// If https is required and request is http, redirect
2489	if ( $secure && !is_ssl() && false !== strpos($_SERVER['REQUEST_URI'], 'wp-admin') ) {
2490		if ( 0 === strpos($_SERVER['REQUEST_URI'], 'http') ) {
2491			wp_redirect(preg_replace('|^http://|', 'https://', $_SERVER['REQUEST_URI']));
2492			exit();
2493		} else {
2494			wp_redirect('https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
2495			exit();
2496		}
2497	}
2498
2499	if ( is_user_admin() )
2500		$scheme = 'logged_in';
2501	else
2502		$scheme = apply_filters( 'auth_redirect_scheme', '' );
2503
2504	if ( $user_id = wp_validate_auth_cookie( '',  $scheme) ) {
2505		do_action('auth_redirect', $user_id);
2506
2507		// If the user wants ssl but the session is not ssl, redirect.
2508		if ( !$secure && get_user_option('use_ssl', $user_id) && false !== strpos($_SERVER['REQUEST_URI'], 'wp-admin') ) {
2509			if ( 0 === strpos($_SERVER['REQUEST_URI'], 'http') ) {
2510				wp_redirect(preg_replace('|^http://|', 'https://', $_SERVER['REQUEST_URI']));
2511				exit();
2512			} else {
2513				wp_redirect('https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
2514				exit();
2515			}
2516		}
2517
2518		return;  // The cookie is good so we're done
2519	}
2520
2521	// The cookie is no good so force login
2522	nocache_headers();
2523
2524	if ( is_ssl() )
2525		$proto = 'https://';
2526	else
2527		$proto = 'http://';
2528
2529	$redirect = ( strpos($_SERVER['REQUEST_URI'], '/options.php') && wp_get_referer() ) ? wp_get_referer() : $proto . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
2530
2531	$login_url = wp_login_url($redirect, true);
2532
2533	wp_redirect($login_url);
2534	exit();
2535}
2536endif;
2537
2538if ( !function_exists('check_admin_referer') ) :
2539/**
2540 * Makes sure that a user was referred from another admin page.
2541 *
2542 * To avoid security exploits.
2543 *
2544 * @since 1.2.0
2545 * @uses do_action() Calls 'check_admin_referer' on $action.
2546 *
2547 * @param string $action Action nonce
2548 * @param string $query_arg where to look for nonce in $_REQUEST (since 2.5)
2549 */
2550function check_admin_referer($action = -1, $query_arg = '_wpnonce') {
2551	if ( -1 == $action )
2552		_doing_it_wrong( __FUNCTION__, __( 'You should specify a nonce action to be verified by using the first parameter.' ), '3.2' );
2553
2554	$adminurl = strtolower(admin_url());
2555	$referer = strtolower(wp_get_referer());
2556	$result = isset($_REQUEST[$query_arg]) ? wp_verify_nonce($_REQUEST[$query_arg], $action) : false;
2557	if ( !$result && !(-1 == $action && strpos($referer, $adminurl) === 0) ) {
2558		wp_nonce_ays($action);
2559		die();
2560	}
2561	do_action('check_admin_referer', $action, $result);
2562	return $result;
2563}endif;
2564
2565if ( !function_exists('check_ajax_referer') ) :
2566/**
2567 * Verifies the AJAX request to prevent processing requests external of the blog.
2568 *
2569 * @since 2.0.3
2570 *
2571 * @param string $action Action nonce
2572 * @param string $query_arg where to look for nonce in $_REQUEST (since 2.5)
2573 */
2574function check_ajax_referer( $action = -1, $query_arg = false, $die = true ) {
2575	if ( $query_arg )
2576		$nonce = $_REQUEST[$query_arg];
2577	else
2578		$nonce = isset($_REQUEST['_ajax_nonce']) ? $_REQUEST['_ajax_nonce'] : $_REQUEST['_wpnonce'];
2579
2580	$result = wp_verify_nonce( $nonce, $action );
2581
2582	if ( $die && false == $result ) {
2583		if ( defined( 'DOING_AJAX' ) && DOING_AJAX )
2584			wp_die( -1 );
2585		else
2586			die( '-1' );
2587	}
2588
2589	do_action('check_ajax_referer', $action, $result);
2590
2591	return $result;
2592}
2593endif;
2594
2595if ( !function_exists('wp_redirect') ) :
2596/**
2597 * Redirects to another page.
2598 *
2599 * @since 1.5.1
2600 * @uses apply_filters() Calls 'wp_redirect' hook on $location and $status.
2601 *
2602 * @param string $location The path to redirect to
2603 * @param int $status Status code to use
2604 * @return bool False if $location is not set
2605 */
2606function wp_redirect($location, $status = 302) {
2607	global $is_IIS;
2608
2609	$location = apply_filters('wp_redirect', $location, $status);
2610	$status = apply_filters('wp_redirect_status', $status, $location);
2611
2612	if ( !$location ) // allows the wp_redirect filter to cancel a redirect
2613		return false;
2614
2615	$location = wp_sanitize_redirect($location);
2616
2617	if ( !$is_IIS && php_sapi_name() != 'cgi-fcgi' )
2618		status_header($status); // This causes problems on IIS and some FastCGI setups
2619
2620	header("Location: $location", true, $status);
2621}
2622endif;
2623
2624if ( !function_exists('wp_sanitize_redirect') ) :
2625/**
2626 * Sanitizes a URL for use in a redirect.
2627 *
2628 * @since 2.3
2629 *
2630 * @return string redirect-sanitized URL
2631 **/
2632function wp_sanitize_redirect($location) {
2633	$location = preg_replace('|[^a-z0-9-~+_.?#=&;,/:%!]|i', '', $location);
2634	$location = wp_kses_no_null($location);
2635
2636	// remove %0d and %0a from location
2637	$strip = array('%0d', '%0a', '%0D', '%0A');
2638	$location = _deep_replace($strip, $location);
2639	return $location;
2640}
2641endif;
2642
2643if ( !function_exists('wp_safe_redirect') ) :
2644/**
2645 * Performs a safe (local) redirect, using wp_redirect().
2646 *
2647 * Checks whether the $location is using an allowed host, if it has an absolute
2648 * path. A plugin can therefore set or remove allowed host(s) to or from the
2649 * list.
2650 *
2651 * If the host is not allowed, then the redirect is to wp-admin on the siteurl
2652 * instead. This prevents malicious redirects which redirect to another host,
2653 * but only used in a few places.
2654 *
2655 * @since 2.3
2656 * @uses wp_validate_redirect() To validate the redirect is to an allowed host.
2657 *
2658 * @return void Does not return anything
2659 **/
2660function wp_safe_redirect($location, $status = 302) {
2661
2662	// Need to look at the URL the way it will end up in wp_redirect()
2663	$location = wp_sanitize_redirect($location);
2664
2665	$location = wp_validate_redirect($location, admin_url());
2666
2667	wp_redirect($location, $status);
2668}
2669endif;
2670
2671if ( !function_exists('wp_validate_redirect') ) :
2672/**
2673 * Validates a URL for use in a redirect.
2674 *
2675 * Checks whether the $location is using an allowed host, if it has an absolute
2676 * path. A plugin can therefore set or remove allowed host(s) to or from the
2677 * list.
2678 *
2679 * If the host is not allowed, then the redirect is to $default supplied
2680 *
2681 * @since 2.8.1
2682 * @uses apply_filters() Calls 'allowed_redirect_hosts' on an array containing
2683 *		WordPress host string and $location host string.
2684 *
2685 * @param string $location The redirect to validate
2686 * @param string $default The value to return if $location is not allowed
2687 * @return string redirect-sanitized URL
2688 **/
2689function wp_validate_redirect($location, $default = '') {
2690	// browsers will assume 'http' is your protocol, and will obey a redirect to a URL starting with '//'
2691	if ( substr($location, 0, 2) == '//' )
2692		$location = 'http:' . $location;
2693
2694	// In php 5 parse_url may fail if the URL query part contains http://, bug #38143
2695	$test = ( $cut = strpos($location, '?') ) ? substr( $location, 0, $cut ) : $location;
2696
2697	$lp  = parse_url($test);
2698
2699	// Give up if malformed URL
2700	if ( false === $lp )
2701		return $default;
2702
2703	// Allow only http and https schemes. No data:, etc.
2704	if ( isset($lp['scheme']) && !('http' == $lp['scheme'] || 'https' == $lp['scheme']) )
2705		return $default;
2706
2707	// Reject if scheme is set but host is not. This catches urls like https:host.com for which parse_url does not set the host field.
2708	if ( isset($lp['scheme'])  && !isset($lp['host']) )
2709		return $default;
2710
2711	$wpp = parse_url(home_url());
2712
2713	$allowed_hosts = (array) apply_filters('allowed_redirect_hosts', array($wpp['host']), isset($lp['host']) ? $lp['host'] : '');
2714
2715	if ( isset($lp['host']) && ( !in_array($lp['host'], $allowed_hosts) && $lp['host'] != strtolower($wpp['host'])) )
2716		$location = $default;
2717
2718	return $location;
2719}
2720endif;
2721
2722if ( ! function_exists('wp_notify_postauthor') ) :
2723/**
2724 * Notify an author of a comment/trackback/pingback to one of their posts.
2725 *
2726 * @since 1.0.0
2727 *
2728 * @param int $comment_id Comment ID
2729 * @param string $comment_type Optional. The comment type either 'comment' (default), 'trackback', or 'pingback'
2730 * @return bool False if user email does not exist. True on completion.
2731 */
2732function wp_notify_postauthor( $comment_id, $comment_type = '' ) {
2733	$comment = get_comment( $comment_id );
2734	$post    = get_post( $comment->comment_post_ID );
2735	$author  = get_userdata( $post->post_author );
2736
2737	// The comment was left by the author
2738	if ( $comment->user_id == $post->post_author )
2739		return false;
2740
2741	// The author moderated a comment on his own post
2742	if ( $post->post_author == get_current_user_id() )
2743		return false;
2744
2745	// If there's no email to send the comment to
2746	if ( '' == $author->user_email )
2747		return false;
2748
2749	$comment_author_domain = @gethostbyaddr($comment->comment_author_IP);
2750
2751	// The blogname option is escaped with esc_html on the way into the database in sanitize_option
2752	// we want to reverse this for the plain text arena of emails.
2753	$blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES);
2754
2755	if ( empty( $comment_type ) ) $comment_type = 'comment';
2756
2757	if ('comment' == $comment_type) {
2758		$notify_message  = sprintf( __( 'New comment on your post "%s"' ), $post->post_title ) . "\r\n";
2759		/* translators: 1: comment author, 2: author IP, 3: author domain */
2760		$notify_message .= sprintf( __('Author : %1$s (IP: %2$s , %3$s)'), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
2761		$notify_message .= sprintf( __('E-mail : %s'), $comment->comment_author_email ) . "\r\n";
2762		$notify_message .= sprintf( __('URL    : %s'), $comment->comment_author_url ) . "\r\n";
2763		$notify_message .= sprintf( __('Whois  : http://whois.arin.net/rest/ip/%s'), $comment->comment_author_IP ) . "\r\n";
2764		$notify_message .= __('Comment: ') . "\r\n" . $comment->comment_content . "\r\n\r\n";
2765		$notify_message .= __('You can see all comments on this post here: ') . "\r\n";
2766		/* translators: 1: blog name, 2: post title */
2767		$subject = sprintf( __('[%1$s] Comment: "%2$s"'), $blogname, $post->post_title );
2768	} elseif ('trackback' == $comment_type) {
2769		$notify_message  = sprintf( __( 'New trackback on your post "%s"' ), $post->post_title ) . "\r\n";
2770		/* translators: 1: website name, 2: author IP, 3: author domain */
2771		$notify_message .= sprintf( __('Website: %1$s (IP: %2$s , %3$s)'), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
2772		$notify_message .= sprintf( __('URL    : %s'), $comment->comment_author_url ) . "\r\n";
2773		$notify_message .= __('Excerpt: ') . "\r\n" . $comment->comment_content . "\r\n\r\n";
2774		$notify_message .= __('You can see all trackbacks on this post here: ') . "\r\n";
2775		/* translators: 1: blog name, 2: post title */
2776		$subject = sprintf( __('[%1$s] Trackback: "%2$s"'), $blogname, $post->post_title );
2777	} elseif ('pingback' == $comment_type) {
2778		$notify_message  = sprintf( __( 'New pingback on your post "%s"' ), $post->post_title ) . "\r\n";
2779		/* translators: 1: comment author, 2: author IP, 3: author domain */
2780		$notify_message .= sprintf( __('Website: %1$s (IP: %2$s , %3$s)'), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
2781		$notify_message .= sprintf( __('URL    : %s'), $comment->comment_author_url ) . "\r\n";
2782		$notify_message .= __('Excerpt: ') . "\r\n" . sprintf('[...] %s [...]', $comment->comment_content ) . "\r\n\r\n";
2783		$notify_message .= __('You can see all pingbacks on this post here: ') . "\r\n";
2784		/* translators: 1: blog name, 2: post title */
2785		$subject = sprintf( __('[%1$s] Pingback: "%2$s"'), $blogname, $post->post_title );
2786	}
2787	$notify_message .= get_permalink($comment->comment_post_ID) . "#comments\r\n\r\n";
2788	$notify_message .= sprintf( __('Permalink: %s'), get_permalink( $comment->comment_post_ID ) . '#comment-' . $comment_id ) . "\r\n";
2789	if ( EMPTY_TRASH_DAYS )
2790		$notify_message .= sprintf( __('Trash it: %s'), admin_url("comment.php?action=trash&c=$comment_id") ) . "\r\n";
2791	else
2792		$notify_message .= sprintf( __('Delete it: %s'), admin_url("comment.php?action=delete&c=$comment_id") ) . "\r\n";
2793	$notify_message .= sprintf( __('Spam it: %s'), admin_url("comment.php?action=spam&c=$comment_id") ) . "\r\n";
2794
2795	$wp_email = 'wordpress@' . preg_replace('#^www\.#', '', strtolower($_SERVER['SERVER_NAME']));
2796
2797	if ( '' == $comment->comment_author ) {
2798		$from = "From: \"$blogname\" <$wp_email>";
2799		if ( '' != $comment->comment_author_email )
2800			$reply_to = "Reply-To: $comment->comment_author_email";
2801	} else {
2802		$from = "From: \"$comment->comment_author\" <$wp_email>";
2803		if ( '' != $comment->comment_author_email )
2804			$reply_to = "Reply-To: \"$comment->comment_author_email\" <$comment->comment_author_email>";
2805	}
2806
2807	$message_headers = "$from\n"
2808		. "Content-Type: text/plain; charset=\"" . get_option('blog_charset') . "\"\n";
2809
2810	if ( isset($reply_to) )
2811		$message_headers .= $reply_to . "\n";
2812
2813	$notify_message = apply_filters('comment_notification_text', $notify_message, $comment_id);
2814	$subject = apply_filters('comment_notification_subject', $subject, $comment_id);
2815	$message_headers = apply_filters('comment_notification_headers', $message_headers, $comment_id);
2816
2817	@wp_mail( $author->user_email, $subject, $notify_message, $message_headers );
2818
2819	return true;
2820}
2821endif;
2822
2823if ( !function_exists('wp_notify_moderator') ) :
2824/**
2825 * Notifies the moderator of the blog about a new comment that is awaiting approval.
2826 *
2827 * @since 1.0
2828 * @uses $wpdb
2829 *
2830 * @param int $comment_id Comment ID
2831 * @return bool Always returns true
2832 */
2833function wp_notify_moderator($comment_id) {
2834	global $wpdb;
2835
2836	if ( 0 == get_option( 'moderation_notify' ) )
2837		return true;
2838
2839	$comment = get_comment($comment_id);
2840	$post = get_post($comment->comment_post_ID);
2841	$user = get_userdata( $post->post_author );
2842	// Send to the administration and to the post author if the author can modify the comment.
2843	$email_to = array( get_option('admin_email') );
2844	if ( user_can($user->ID, 'edit_comment', $comment_id) && !empty($user->user_email) && ( get_option('admin_email') != $user->user_email) )
2845		$email_to[] = $user->user_email;
2846
2847	$comment_author_domain = @gethostbyaddr($comment->comment_author_IP);
2848	$comments_waiting = $wpdb->get_var("SELECT count(comment_ID) FROM $wpdb->comments WHERE comment_approved = '0'");
2849
2850	// The blogname option is escaped with esc_html on the way into the database in sanitize_option
2851	// we want to reverse this for the plain text arena of emails.
2852	$blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES);
2853
2854	switch ($comment->comment_type)
2855	{
2856		case 'trackback':
2857			$notify_message  = sprintf( __('A new trackback on the post "%s" is waiting for your approval'), $post->post_title ) . "\r\n";
2858			$notify_message .= get_permalink($comment->comment_post_ID) . "\r\n\r\n";
2859			$notify_message .= sprintf( __('Website : %1$s (IP: %2$s , %3$s)'), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
2860			$notify_message .= sprintf( __('URL    : %s'), $comment->comment_author_url ) . "\r\n";
2861			$notify_message .= __('Trackback excerpt: ') . "\r\n" . $comment->comment_content . "\r\n\r\n";
2862			break;
2863		case 'pingback':
2864			$notify_message  = sprintf( __('A new pingback on the post "%s" is waiting for your approval'), $post->post_title ) . "\r\n";
2865			$notify_message .= get_permalink($comment->comment_post_ID) . "\r\n\r\n";
2866			$notify_message .= sprintf( __('Website : %1$s (IP: %2$s , %3$s)'), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
2867			$notify_message .= sprintf( __('URL    : %s'), $comment->comment_author_url ) . "\r\n";
2868			$notify_message .= __('Pingback excerpt: ') . "\r\n" . $comment->comment_content . "\r\n\r\n";
2869			break;
2870		default: //Comments
2871			$notify_message  = sprintf( __('A new comment on the post "%s" is waiting for your approval'), $post->post_title ) . "\r\n";
2872			$notify_message .= get_permalink($comment->comment_post_ID) . "\r\n\r\n";
2873			$notify_message .= sprintf( __('Author : %1$s (IP: %2$s , %3$s)'), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
2874			$notify_message .= sprintf( __('E-mail : %s'), $comment->comment_author_email ) . "\r\n";
2875			$notify_message .= sprintf( __('URL    : %s'), $comment->comment_author_url ) . "\r\n";
2876			$notify_message .= sprintf( __('Whois  : http://whois.arin.net/rest/ip/%s'), $comment->comment_author_IP ) . "\r\n";
2877			$notify_message .= __('Comment: ') . "\r\n" . $comment->comment_content . "\r\n\r\n";
2878			break;
2879	}
2880
2881	$notify_message .= sprintf( __('Approve it: %s'),  admin_url("comment.php?action=approve&c=$comment_id") ) . "\r\n";
2882	if ( EMPTY_TRASH_DAYS )
2883		$notify_message .= sprintf( __('Trash it: %s'), admin_url("comment.php?action=trash&c=$comment_id") ) . "\r\n";
2884	else
2885		$notify_message .= sprintf( __('Delete it: %s'), admin_url("comment.php?action=delete&c=$comment_id") ) . "\r\n";
2886	$notify_message .= sprintf( __('Spam it: %s'), admin_url("comment.php?action=spam&c=$comment_id") ) . "\r\n";
2887
2888	$notify_message .= sprintf( _n('Currently %s comment is waiting for approval. Please visit the moderation panel:',
2889 		'Currently %s comments are waiting for approval. Please visit the moderation panel:', $comments_waiting), number_format_i18n($comments_waiting) ) . "\r\n";
2890	$notify_message .= admin_url("edit-comments.php?comment_status=moderated") . "\r\n";
2891
2892	$subject = sprintf( __('[%1$s] Please moderate: "%2$s"'), $blogname, $post->post_title );
2893	$message_headers = '';
2894
2895	$notify_message = apply_filters('comment_moderation_text', $notify_message, $comment_id);
2896	$subject = apply_filters('comment_moderation_subject', $subject, $comment_id);
2897	$message_headers = apply_filters('comment_moderation_headers', $message_headers);
2898
2899	foreach ( $email_to as $email )
2900		@wp_mail($email, $subject, $notify_message, $message_headers);
2901
2902	return true;
2903}
2904endif;
2905
2906if ( !function_exists('wp_password_change_notification') ) :
2907/**
2908 * Notify the blog admin of a user changing password, normally via email.
2909 *
2910 * @since 2.7
2911 *
2912 * @param object $user User Object
2913 */
2914function wp_password_change_notification(&$user) {
2915	// send a copy of password change notification to the admin
2916	// but check to see if it's the admin whose password we're changing, and skip this
2917	if ( $user->user_email != get_option('admin_email') ) {
2918		$message = sprintf(__('Password Lost and Changed for user: %s'), $user->user_login) . "\r\n";
2919		// The blogname option is escaped with esc_html on the way into the database in sanitize_option
2920		// we want to reverse this for the plain text arena of emails.
2921		$blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES);
2922		wp_mail(get_option('admin_email'), sprintf(__('[%s] Password Lost/Changed'), $blogname), $message);
2923	}
2924}
2925endif;
2926
2927if ( !function_exists('wp_new_user_notification') ) :
2928/**
2929 * Notify the blog admin of a new user, normally via email.
2930 *
2931 * @since 2.0
2932 *
2933 * @param int $user_id User ID
2934 * @param string $plaintext_pass Optional. The user's plaintext password
2935 */
2936function wp_new_user_notification($user_id, $plaintext_pass = '') {
2937	$user = new WP_User($user_id);
2938
2939	$user_login = stripslashes($user->user_login);
2940	$user_email = stripslashes($user->user_email);
2941
2942	// The blogname option is escaped with esc_html on the way into the database in sanitize_option
2943	// we want to reverse this for the plain text arena of emails.
2944	$blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES);
2945
2946	$message  = sprintf(__('New user registration on your site %s:'), $blogname) . "\r\n\r\n";
2947	$message .= sprintf(__('Username: %s'), $user_login) . "\r\n\r\n";
2948	$message .= sprintf(__('E-mail: %s'), $user_email) . "\r\n";
2949
2950	@wp_mail(get_option('admin_email'), sprintf(__('[%s] New User Registration'), $blogname), $message);
2951
2952	if ( empty($plaintext_pass) )
2953		return;
2954
2955	$message  = sprintf(__('Username: %s'), $user_login) . "\r\n";
2956	$message .= sprintf(__('Password: %s'), $plaintext_pass) . "\r\n";
2957	$message .= wp_login_url() . "\r\n";
2958
2959	wp_mail($user_email, sprintf(__('[%s] Your username and password'), $blogname), $message);
2960
2961}
2962endif;
2963
2964if ( !function_exists('wp_nonce_tick') ) :
2965/**
2966 * Get the time-dependent variable for nonce creation.
2967 *
2968 * A nonce has a lifespan of two ticks. Nonces in their second tick may be
2969 * updated, e.g. by autosave.
2970 *
2971 * @since 2.5
2972 *
2973 * @return int
2974 */
2975function wp_nonce_tick() {
2976	$nonce_life = apply_filters('nonce_life', 86400);
2977
2978	return ceil(time() / ( $nonce_life / 2 ));
2979}
2980endif;
2981
2982if ( !function_exists('wp_verify_nonce') ) :
2983/**
2984 * Verify that correct nonce was used with time limit.
2985 *
2986 * The user is given an amount of time to use the token, so therefore, since the
2987 * UID and $action remain the same, the independent variable is the time.
2988 *
2989 * @since 2.0.3
2990 *
2991 * @param string $nonce Nonce that was used in the form to verify
2992 * @param string|int $action Should give context to what is taking place and be the same when nonce was created.
2993 * @return bool Whether the nonce check passed or failed.
2994 */
2995function wp_verify_nonce($nonce, $action = -1) {
2996	$user = wp_get_current_user();
2997	$uid = (int) $user->ID;
2998
2999	$i = wp_nonce_tick();
3000
3001	// Nonce generated 0-12 hours ago
3002	if ( substr(wp_hash($i . $action . $uid, 'nonce'), -12, 10) == $nonce )
3003		return 1;
3004	// Nonce generated 12-24 hours ago
3005	if ( substr(wp_hash(($i - 1) . $action . $uid, 'nonce'), -12, 10) == $nonce )
3006		return 2;
3007	// Invalid nonce
3008	return false;
3009}
3010endif;
3011
3012if ( !function_exists('wp_create_nonce') ) :
3013/**
3014 * Creates a random, one time use token.
3015 *
3016 * @since 2.0.3
3017 *
3018 * @param string|int $action Scalar value to add context to the nonce.
3019 * @return string The one use form token
3020 */
3021function wp_create_nonce($action = -1) {
3022	$user = wp_get_current_user();
3023	$uid = (int) $user->ID;
3024
3025	$i = wp_nonce_tick();
3026
3027	return substr(wp_hash($i . $action . $uid, 'nonce'), -12, 10);
3028}
3029endif;
3030
3031if ( !function_exists('wp_salt') ) :
3032/**
3033 * Get salt to add to hashes.
3034 *
3035 * Salts are created using secret keys. Secret keys are located in two places:
3036 * in the database and in the wp-config.php file. The secret key in the database
3037 * is randomly generated and will be appended to the secret keys in wp-config.php.
3038 *
3039 * The secret keys in wp-config.php should be updated to strong, random keys to maximize
3040 * security. Below is an example of how the secret key constants are defined.
3041 * Do not paste this example directly into wp-config.php. Instead, have a
3042 * {@link https://api.wordpress.org/secret-key/1.1/salt/ secret key created} just
3043 * for you.
3044 *
3045 * <code>
3046 * define('AUTH_KEY',         ' Xakm<o xQy rw4EMsLKM-?!T+,PFF})H4lzcW57AF0U@N@< >M%G4Yt>f`z]MON');
3047 * define('SECURE_AUTH_KEY',  'LzJ}op]mr|6+![P}Ak:uNdJCJZd>(Hx.-Mh#Tz)pCIU#uGEnfFz|f ;;eU%/U^O~');
3048 * define('LOGGED_IN_KEY',    '|i|Ux`9<p-h$aFf(qnT:sDO:D1P^wZ$$/Ra@miTJi9G;ddp_<q}6H1)o|a +&JCM');
3049 * define('NONCE_KEY',        '%:R{[P|,s.KuMltH5}cI;/k<Gx~j!f0I)m_sIyu+&NJZ)-iO>z7X>QYR0Z_XnZ@|');
3050 * define('AUTH_SALT',        'eZyT)-Naw]F8CwA*VaW#q*|.)g@o}||wf~@C-YSt}(dh_r6EbI#A,y|nU2{B#JBW');
3051 * define('SECURE_AUTH_SALT', '!=oLUTXh,QW=H `}`L|9/^4-3 STz},T(w}W<I`.JjPi)<Bmf1v,HpGe}T1:Xt7n');
3052 * define('LOGGED_IN_SALT',   '+XSqHc;@Q*K_b|Z?NC[3H!!EONbh.n<+=uKR:>*c(u`g~EJBf#8u#R{mUEZrozmm');
3053 * define('NONCE_SALT',       'h`GXHhD>SLWVfg1(1(N{;.V!MoE(SfbA_ksP@&`+AycHcAV$+?@3q+rxV{%^VyKT');
3054 * </code>
3055 *
3056 * Salting passwords helps against tools which has stored hashed values of
3057 * common dictionary strings. The added values makes it harder to crack.
3058 *
3059 * @since 2.5
3060 *
3061 * @link https://api.wordpress.org/secret-key/1.1/salt/ Create secrets for wp-config.php
3062 *
3063 * @param string $scheme Authentication scheme (auth, secure_auth, logged_in, nonce)
3064 * @return string Salt value
3065 */
3066function wp_salt( $scheme = 'auth' ) {
3067	static $cached_salts = array();
3068	if ( isset( $cached_salts[ $scheme ] ) )
3069		return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme );
3070
3071	static $duplicated_keys;
3072	if ( null === $duplicated_keys ) {
3073		$duplicated_keys = array( 'put your unique phrase here' => true );
3074		foreach ( array( 'AUTH', 'SECURE_AUTH', 'LOGGED_IN', 'NONCE', 'SECRET' ) as $first ) {
3075			foreach ( array( 'KEY', 'SALT' ) as $second ) {
3076				if ( ! defined( "{$first}_{$second}" ) )
3077					continue;
3078				$value = constant( "{$first}_{$second}" );
3079				$duplicated_keys[ $value ] = isset( $duplicated_keys[ $value ] );
3080			}
3081		}
3082	}
3083
3084	$key = $salt = '';
3085	if ( defined( 'SECRET_KEY' ) && SECRET_KEY && empty( $duplicated_keys[ SECRET_KEY ] ) )
3086		$key = SECRET_KEY;
3087	if ( 'auth' == $scheme && defined( 'SECRET_SALT' ) && SECRET_SALT && empty( $duplicated_keys[ SECRET_SALT ] ) )
3088		$salt = SECRET_SALT;
3089
3090	if ( in_array( $scheme, array( 'auth', 'secure_auth', 'logged_in', 'nonce' ) ) ) {
3091		foreach ( array( 'key', 'salt' ) as $type ) {
3092			$const = strtoupper( "{$scheme}_{$type}" );
3093			if ( defined( $const ) && constant( $const ) && empty( $duplicated_keys[ constant( $const ) ] ) ) {
3094				$$type = constant( $const );
3095			} elseif ( ! $$type ) {
3096				$$type = get_site_option( "{$scheme}_{$type}" );
3097				if ( ! $$type ) {
3098					$$type = wp_generate_password( 64, true, true );
3099					update_site_option( "{$scheme}_{$type}", $$type );
3100				}
3101			}
3102		}
3103	} else {
3104		if ( ! $key ) {
3105			$key = get_site_option( 'secret_key' );
3106			if ( ! $key ) {
3107				$key = wp_generate_password( 64, true, true );
3108				update_site_option( 'secret_key', $key );
3109			}
3110		}
3111		$salt = hash_hmac( 'md5', $scheme, $key );
3112	}
3113
3114	$cached_salts[ $scheme ] = $key . $salt;
3115	return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme );
3116}
3117endif;
3118
3119if ( !function_exists('wp_hash') ) :
3120/**
3121 * Get hash of given string.
3122 *
3123 * @since 2.0.3
3124 * @uses wp_salt() Get WordPress salt
3125 *
3126 * @param string $data Plain text to hash
3127 * @return string Hash of $data
3128 */
3129function wp_hash($data, $scheme = 'auth') {
3130	$salt = wp_salt($scheme);
3131
3132	return hash_hmac('md5', $data, $salt);
3133}
3134endif;
3135
3136if ( !function_exists('wp_hash_password') ) :
3137/**
3138 * Create a hash (encrypt) of a plain text password.
3139 *
3140 * For integration with other applications, this function can be overwritten to
3141 * instead use the other package password checking algorithm.
3142 *
3143 * @since 2.5
3144 * @global object $wp_hasher PHPass object
3145 * @uses PasswordHash::HashPassword
3146 *
3147 * @param string $password Plain text user password to hash
3148 * @return string The hash string of the password
3149 */
3150function wp_hash_password($password) {
3151	global $wp_hasher;
3152
3153	if ( empty($wp_hasher) ) {
3154		require_once( ABSPATH . 'wp-includes/class-phpass.php');
3155		// By default, use the portable hash from phpass
3156		$wp_hasher = new PasswordHash(8, true);
3157	}
3158
3159	return $wp_hasher->HashPassword($password);
3160}
3161endif;
3162
3163if ( !function_exists('wp_check_password') ) :
3164/**
3165 * Checks the plaintext password against the encrypted Password.
3166 *
3167 * Maintains compatibility between old version and the new cookie authentication
3168 * protocol using PHPass library. The $hash parameter is the encrypted password
3169 * and the function compares the plain text password when encrypted similarly
3170 * against the already encrypted password to see if they match.
3171 *
3172 * For integration with other applications, this function can be overwritten to
3173 * instead use the other package password checking algorithm.
3174 *
3175 * @since 2.5
3176 * @global object $wp_hasher PHPass object used for checking the password
3177 *	against the $hash + $password
3178 * @uses PasswordHash::CheckPassword
3179 *
3180 * @param string $password Plaintext user's password
3181 * @param string $hash Hash of the user's password to check against.
3182 * @return bool False, if the $password does not match the hashed password
3183 */
3184function wp_check_password($password, $hash, $user_id = '') {
3185	global $wp_hasher;
3186
3187	// If the hash is still md5...
3188	if ( strlen($hash) <= 32 ) {
3189		$check = ( $hash == md5($password) );
3190		if ( $check && $user_id ) {
3191			// Rehash using new hash.
3192			wp_set_password($password, $user_id);
3193			$hash = wp_hash_password($password);
3194		}
3195
3196		return apply_filters('check_password', $check, $password, $hash, $user_id);
3197	}
3198
3199	// If the stored hash is longer than an MD5, presume the
3200	// new style phpass portable hash.
3201	if ( empty($wp_hasher) ) {
3202		require_once( ABSPATH . 'wp-includes/class-phpass.php');
3203		// By default, use the portable hash from phpass
3204		$wp_hasher = new PasswordHash(8, true);
3205	}
3206
3207	$check = $wp_hasher->CheckPassword($password, $hash);
3208
3209	return apply_filters('check_password', $check, $password, $hash, $user_id);
3210}
3211endif;
3212
3213if ( !function_exists('wp_generate_password') ) :
3214/**
3215 * Generates a random password drawn from the defined set of characters.
3216 *
3217 * @since 2.5
3218 *
3219 * @param int $length The length of password to generate
3220 * @param bool $special_chars Whether to include standard special characters. Default true.
3221 * @param bool $extra_special_chars Whether to include other special characters. Used when
3222 *   generating secret keys and salts. Default false.
3223 * @return string The random password
3224 **/
3225function wp_generate_password( $length = 12, $special_chars = true, $extra_special_chars = false ) {
3226	$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
3227	if ( $special_chars )
3228		$chars .= '!@#$%^&*()';
3229	if ( $extra_special_chars )
3230		$chars .= '-_ []{}<>~`+=,.;:/?|';
3231
3232	$password = '';
3233	for ( $i = 0; $i < $length; $i++ ) {
3234		$password .= substr($chars, wp_rand(0, strlen($chars) - 1), 1);
3235	}
3236
3237	// random_password filter was previously in random_password function which was deprecated
3238	return apply_filters('random_password', $password);
3239}
3240endif;
3241
3242if ( !function_exists('wp_rand') ) :
3243 /**
3244 * Generates a random number
3245 *
3246 * @since 2.6.2
3247 *
3248 * @param int $min Lower limit for the generated number (optional, default is 0)
3249 * @param int $max Upper limit for the generated number (optional, default is 4294967295)
3250 * @return int A random number between min and max
3251 */
3252function wp_rand( $min = 0, $max = 0 ) {
3253	global $rnd_value;
3254
3255	// Reset $rnd_value after 14 uses
3256	// 32(md5) + 40(sha1) + 40(sha1) / 8 = 14 random numbers from $rnd_value
3257	if ( strlen($rnd_value) < 8 ) {
3258		if ( defined( 'WP_SETUP_CONFIG' ) )
3259			static $seed = '';
3260		else
3261			$seed = get_transient('random_seed');
3262		$rnd_value = md5( uniqid(microtime() . mt_rand(), true ) . $seed );
3263		$rnd_value .= sha1($rnd_value);
3264		$rnd_value .= sha1($rnd_value . $seed);
3265		$seed = md5($seed . $rnd_value);
3266		if ( ! defined( 'WP_SETUP_CONFIG' ) )
3267			set_transient('random_seed', $seed);
3268	}
3269
3270	// Take the first 8 digits for our value
3271	$value = substr($rnd_value, 0, 8);
3272
3273	// Strip the first eight, leaving the remainder for the next call to wp_rand().
3274	$rnd_value = substr($rnd_value, 8);
3275
3276	$value = abs(hexdec($value));
3277
3278	// Reduce the value to be within the min - max range
3279	// 4294967295 = 0xffffffff = max random number
3280	if ( $max != 0 )
3281		$value = $min + (($max - $min + 1) * ($value / (4294967295 + 1)));
3282
3283	return abs(intval($value));
3284}
3285endif;
3286
3287if ( !function_exists('wp_set_password') ) :
3288/**
3289 * Updates the user's password with a new encrypted one.
3290 *
3291 * For integration with other applications, this function can be overwritten to
3292 * instead use the other package password checking algorithm.
3293 *
3294 * @since 2.5
3295 * @uses $wpdb WordPress database object for queries
3296 * @uses wp_hash_password() Used to encrypt the user's password before passing to the database
3297 *
3298 * @param string $password The plaintext new user password
3299 * @param int $user_id User ID
3300 */
3301function wp_set_password( $password, $user_id ) {
3302	global $wpdb;
3303
3304	$hash = wp_hash_password($password);
3305	$wpdb->update($wpdb->users, array('user_pass' => $hash, 'user_activation_key' => ''), array('ID' => $user_id) );
3306
3307	wp_cache_delete($user_id, 'users');
3308}
3309endif;
3310
3311if ( !function_exists( 'get_avatar' ) ) :
3312/**
3313 * Retrieve the avatar for a user who provided a user ID or email address.
3314 *
3315 * @since 2.5
3316 * @param int|string|object $id_or_email A user ID,  email address, or comment object
3317 * @param int $size Size of the avatar image
3318 * @param string $default URL to a default image to use if no avatar is available
3319 * @param string $alt Alternate text to use in image tag. Defaults to blank
3320 * @return string <img> tag for the user's avatar
3321*/
3322function get_avatar( $id_or_email, $size = '96', $default = '', $alt = false ) {
3323	if ( ! get_option('show_avatars') )
3324		return false;
3325
3326	if ( false === $alt)
3327		$safe_alt = '';
3328	else
3329		$safe_alt = esc_attr( $alt );
3330
3331	if ( !is_numeric($size) )
3332		$size = '96';
3333
3334	$email = '';
3335	if ( is_numeric($id_or_email) ) {
3336		$id = (int) $id_or_email;
3337		$user = get_userdata($id);
3338		if ( $user )
3339			$email = $user->user_email;
3340	} elseif ( is_object($id_or_email) ) {
3341		// No avatar for pingbacks or trackbacks
3342		$allowed_comment_types = apply_filters( 'get_avatar_comment_types', array( 'comment' ) );
3343		if ( ! empty( $id_or_email->comment_type ) && ! in_array( $id_or_email->comment_type, (array) $allowed_comment_types ) )
3344			return false;
3345
3346		if ( !empty($id_or_email->user_id) ) {
3347			$id = (int) $id_or_email->user_id;
3348			$user = get_userdata($id);
3349			if ( $user)
3350				$email = $user->user_email;
3351		} elseif ( !empty($id_or_email->comment_author_email) ) {
3352			$email = $id_or_email->comment_author_email;
3353		}
3354	} else {
3355		$email = $id_or_email;
3356	}
3357
3358	if ( empty($default) ) {
3359		$avatar_default = get_option('avatar_default');
3360		if ( empty($avatar_default) )
3361			$default = 'mystery';
3362		else
3363			$default = $avatar_default;
3364	}
3365
3366	if ( !empty($email) )
3367		$email_hash = md5( strtolower( trim( $email ) ) );
3368
3369	if ( is_ssl() ) {
3370		$host = 'https://secure.gravatar.com';
3371	} else {
3372		if ( !empty($email) )
3373			$host = sprintf( "http://%d.gravatar.com", ( hexdec( $email_hash[0] ) % 2 ) );
3374		else
3375			$host = 'http://0.gravatar.com';
3376	}
3377
3378	if ( 'mystery' == $default )
3379		$default = "$host/avatar/ad516503a11cd5ca435acc9bb6523536?s={$size}"; // ad516503a11cd5ca435acc9bb6523536 == md5('unknown@gravatar.com')
3380	elseif ( 'blank' == $default )
3381		$default = includes_url('images/blank.gif');
3382	elseif ( !empty($email) && 'gravatar_default' == $default )
3383		$default = '';
3384	elseif ( 'gravatar_default' == $default )
3385		$default = "$host/avatar/?s={$size}";
3386	elseif ( empty($email) )
3387		$default = "$host/avatar/?d=$default&amp;s={$size}";
3388	elseif ( strpos($default, 'http://') === 0 )
3389		$default = add_query_arg( 's', $size, $default );
3390
3391	if ( !empty($email) ) {
3392		$out = "$host/avatar/";
3393		$out .= $email_hash;
3394		$out .= '?s='.$size;
3395		$out .= '&amp;d=' . urlencode( $default );
3396
3397		$rating = get_option('avatar_rating');
3398		if ( !empty( $rating ) )
3399			$out .= "&amp;r={$rating}";
3400
3401		$avatar = "<img alt='{$safe_alt}' src='{$out}' class='avatar avatar-{$size} photo' height='{$size}' width='{$size}' />";
3402	} else {
3403		$avatar = "<img alt='{$safe_alt}' src='{$default}' class='avatar avatar-{$size} photo avatar-default' height='{$size}' width='{$size}' />";
3404	}
3405
3406	return apply_filters('get_avatar', $avatar, $id_or_email, $size, $default, $alt);
3407}
3408endif;
3409
3410if ( !function_exists( 'wp_text_diff' ) ) :
3411/**
3412 * Displays a human readable HTML representation of the difference between two strings.
3413 *
3414 * The Diff is available for getting the changes between versions. The output is
3415 * HTML, so the primary use is for displaying the changes. If the two strings
3416 * are equivalent, then an empty string will be returned.
3417 *
3418 * The arguments supported and can be changed are listed below.
3419 *
3420 * 'title' : Default is an empty string. Titles the diff in a manner compatible
3421 *		with the output.
3422 * 'title_left' : Default is an empty string. Change the HTML to the left of the
3423 *		title.
3424 * 'title_right' : Default is an empty string. Change the HTML to the right of
3425 *		the title.
3426 *
3427 * @since 2.6
3428 * @see wp_parse_args() Used to change defaults to user defined settings.
3429 * @uses Text_Diff
3430 * @uses WP_Text_Diff_Renderer_Table
3431 *
3432 * @param string $left_string "old" (left) version of string
3433 * @param string $right_string "new" (right) version of string
3434 * @param string|array $args Optional. Change 'title', 'title_left', and 'title_right' defaults.
3435 * @return string Empty string if strings are equivalent or HTML with differences.
3436 */
3437function wp_text_diff( $left_string, $right_string, $args = null ) {
3438	$defaults = array( 'title' => '', 'title_left' => '', 'title_right' => '' );
3439	$args = wp_parse_args( $args, $defaults );
3440
3441	if ( !class_exists( 'WP_Text_Diff_Renderer_Table' ) )
3442		require( ABSPATH . WPINC . '/wp-diff.php' );
3443
3444	$left_string  = normalize_whitespace($left_string);
3445	$right_string = normalize_whitespace($right_string);
3446
3447	$left_lines  = explode("\n", $left_string);
3448	$right_lines = explode("\n", $right_string);
3449
3450	$text_diff = new Text_Diff($left_lines, $right_lines);
3451	$renderer  = new WP_Text_Diff_Renderer_Table();
3452	$diff = $renderer->render($text_diff);
3453
3454	if ( !$diff )
3455		return '';
3456
3457	$r  = "<table class='diff'>\n";
3458	$r .= "<col class='ltype' /><col class='content' /><col class='ltype' /><col class='content' />";
3459
3460	if ( $args['title'] || $args['title_left'] || $args['title_right'] )
3461		$r .= "<thead>";
3462	if ( $args['title'] )
3463		$r .= "<tr class='diff-title'><th colspan='4'>$args[title]</th></tr>\n";
3464	if ( $args['title_left'] || $args['title_right'] ) {
3465		$r .= "<tr class='diff-sub-title'>\n";
3466		$r .= "\t<td></td><th>$args[title_left]</th>\n";
3467		$r .= "\t<td></td><th>$args[title_right]</th>\n";
3468		$r .= "</tr>\n";
3469	}
3470	if ( $args['title'] || $args['title_left'] || $args['title_right'] )
3471		$r .= "</thead>\n";
3472
3473	$r .= "<tbody>\n$diff\n</tbody>\n";
3474	$r .= "</table>";
3475
3476	return $r;
3477}
3478endif;