Email address validation with Mailgun

validate_email.php

<?php

error_reporting(E_ALL);

function validate_email($email)
{
    $key = ''; // Setup Mailgun public key

    if (function_exists('filter_var')) {

        $validate_email = filter_var($email, FILTER_VALIDATE_EMAIL);

        if (!$validate_email) {
            return FALSE;
        }
    }
    
    try {

        $url = "https://api.mailgun.net/v2/address/validate?address=".urlencode($email)."&api_key=". $key;

        $data = call_user_func(function($url){ if (!$data = @file_get_contents($url)) { throw new Exception('URL load failed'); } return $data; }, $url);

        $res = (boolean) json_decode($data)->is_valid;

    } catch (Exception $e) {

        // echo 'Mailgun validation exception: '. $e->getMessage() .' / email: '. $email;

        $res = TRUE;
    }

    return $res;
}

var_dump( validate_email('[email protected]') );

/**
 * If you are using PHP version lower than 5.3.0 you should use 'create_function' instead of native anonymous function. In this case you should replace this:
 * 
 *  $data = call_user_func(function($url){ if (!$data = @file_get_contents($url)) { throw new Exception('URL load failed'); } return $data; }, $url);
 * 
 * with this code:
 * 
 *  $mailgunfunc = create_function('$url', 'if (!$data = @file_get_contents($url)) { throw new Exception(\'URL load failed\'); } return $data;');
 *  $data = $mailgunfunc($url);
 * 
 */

/* end of file */
/* ---------------------------------- */