2vAg7TKG

1<?php 
2    function dec_enc($action, $string) {
3        $output = false;
4
5        $encrypt_method = "AES-256-CBC";
6        $secret_key = 'This is my secret key';
7        $secret_iv = 'This is my secret iv';
8
9        // hash
10        $key = hash('sha256', $secret_key);
11
12        // iv - encrypt method AES-256-CBC expects 16 bytes - else you will get a warning
13        $iv = substr(hash('sha256', $secret_iv), 0, 16);
14
15        if( $action == 'encrypt' ) {
16            $output = openssl_encrypt($string, $encrypt_method, $key, 0, $iv);
17            $output = base64_encode($output);
18        }
19        else if( $action == 'decrypt' ){
20            $output = openssl_decrypt(base64_decode($string), $encrypt_method, $key, 0, $iv);
21        }
22
23        return $output;
24    }
25?>