9XgCRaPV

1/**
2 * function to validate email address
3 * check against array of blacklisted domains
4 */
5function gf_email_validation($validation_result) {
6    // Set the $validation_result object to $form
7    $form = $validation_result["form"];
8    // Get the value the user entered for the email field (name of input)
9    $email = $_POST["input_2"];
10    $email_blacklist = array("yahoo.com", "hotmail.com", "aol.com", "msn.com", "verizon.com", "comcast.com", "live.com", "gmx.com", "outlook.com", "gmail.com");
11    //explode will store the string into array, e.g: example@gmail.com
12    $udomain = explode('@', $email);
13    //select the email domain from the above splitted array
14    $email_domain = $udomain[1];
15    
16    if (in_array($email_domain, $email_blacklist)) {
17        // set the form validation to false
18        $validation_result["is_valid"] = false;
19        // specify the invalid field and provide custom validation message
20        $form["fields"][1]["failed_validation"] = true;
21        $form["fields"][1]["validation_message"] = __('You must enter a business email address.', 'spx');
22    }
23    // update the form in the validation result with the form object you modified
24    $validation_result["form"] = $form;
25    return $validation_result;
26}
27add_filter('gform_validation', 'gf_email_validation', 20, 2);