public static function validateAddress($address, $patternselect = null)
{
if (is_null($patternselect)) {
$patternselect = self::$validator;
}
if (is_callable($patternselect)) {
return call_user_func($patternselect, $address);
}
//Reject line breaks in addresses; it's valid RFC5322, but not RFC5321
if (strpos($address, "\n") !== false or strpos($address, "\r") !== false) {
return false;
}
if (!$patternselect or 'auto' == $patternselect) {
//Check this constant first so it works when extension_loaded() is disabled by safe mode
if (defined('PCRE_VERSION')) {
//This pattern can get stuck in a recursive loop in PCRE <= 8.0.2
if (version_compare(PCRE_VERSION, '8.0.3') >= 0) {
$patternselect = 'pcre8';
} else {
$patternselect = 'pcre';
}
} elseif (function_exists('extension_loaded') and extension_loaded('pcre')) {
//Fall back to older PCRE
$patternselect = 'pcre';
} else {
$patternselect = 'php';
}
}
switch ($patternselect) {
case 'pcre8':
/**
* Uses the same RFC5322 regex on which FILTER_VALIDATE_EMAIL is based, but allows dotless domains.
* @link http://squiloople.com/2009/12/20/email-address-validation/
* @copyright 2009-2010 Michael Rushton
* Feel free to use and redistribute this code. But please keep this copyright notice.
*/
return (bool) preg_match('/^(?!(?>(?1)"?(?>\\\\[ -~]|[^"])"?(?1)){255,})(?!(?>(?1)"?(?>\\\\[ -~]|[^"])"?(?1)){65,}@)' . '((?>(?>(?>((?>(?>(?>\\x0D\\x0A)?[\\t ])+|(?>[\\t ]*\\x0D\\x0A)?[\\t ]+)?)(\\((?>(?2)' . '(?>[\\x01-\\x08\\x0B\\x0C\\x0E-\'*-\\[\\]-\\x7F]|\\\\[\\x00-\\x7F]|(?3)))*(?2)\\)))+(?2))|(?2))?)' . '([!#-\'*+\\/-9=?^-~-]+|"(?>(?2)(?>[\\x01-\\x08\\x0B\\x0C\\x0E-!#-\\[\\]-\\x7F]|\\\\[\\x00-\\x7F]))*' . '(?2)")(?>(?1)\\.(?1)(?4))*(?1)@(?!(?1)[a-z0-9-]{64,})(?1)(?>([a-z0-9](?>[a-z0-9-]*[a-z0-9])?)' . '(?>(?1)\\.(?!(?1)[a-z0-9-]{64,})(?1)(?5)){0,126}|\\[(?:(?>IPv6:(?>([a-f0-9]{1,4})(?>:(?6)){7}' . '|(?!(?:.*[a-f0-9][:\\]]){8,})((?6)(?>:(?6)){0,6})?::(?7)?))|(?>(?>IPv6:(?>(?6)(?>:(?6)){5}:' . '|(?!(?:.*[a-f0-9]:){6,})(?8)?::(?>((?6)(?>:(?6)){0,4}):)?))?(25[0-5]|2[0-4][0-9]|1[0-9]{2}' . '|[1-9]?[0-9])(?>\\.(?9)){3}))\\])(?1)$/isD', $address);
case 'pcre':
//An older regex that doesn't need a recent PCRE
return (bool) preg_match('/^(?!(?>"?(?>\\\\[ -~]|[^"])"?){255,})(?!(?>"?(?>\\\\[ -~]|[^"])"?){65,}@)(?>' . '[!#-\'*+\\/-9=?^-~-]+|"(?>(?>[\\x01-\\x08\\x0B\\x0C\\x0E-!#-\\[\\]-\\x7F]|\\\\[\\x00-\\xFF]))*")' . '(?>\\.(?>[!#-\'*+\\/-9=?^-~-]+|"(?>(?>[\\x01-\\x08\\x0B\\x0C\\x0E-!#-\\[\\]-\\x7F]|\\\\[\\x00-\\xFF]))*"))*' . '@(?>(?![a-z0-9-]{64,})(?>[a-z0-9](?>[a-z0-9-]*[a-z0-9])?)(?>\\.(?![a-z0-9-]{64,})' . '(?>[a-z0-9](?>[a-z0-9-]*[a-z0-9])?)){0,126}|\\[(?:(?>IPv6:(?>(?>[a-f0-9]{1,4})(?>:' . '[a-f0-9]{1,4}){7}|(?!(?:.*[a-f0-9][:\\]]){8,})(?>[a-f0-9]{1,4}(?>:[a-f0-9]{1,4}){0,6})?' . '::(?>[a-f0-9]{1,4}(?>:[a-f0-9]{1,4}){0,6})?))|(?>(?>IPv6:(?>[a-f0-9]{1,4}(?>:' . '[a-f0-9]{1,4}){5}:|(?!(?:.*[a-f0-9]:){6,})(?>[a-f0-9]{1,4}(?>:[a-f0-9]{1,4}){0,4})?' . '::(?>(?:[a-f0-9]{1,4}(?>:[a-f0-9]{1,4}){0,4}):)?))?(?>25[0-5]|2[0-4][0-9]|1[0-9]{2}' . '|[1-9]?[0-9])(?>\\.(?>25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3}))\\])$/isD', $address);
case 'html5':
/**
* This is the pattern used in the HTML5 spec for validation of 'email' type form input elements.
* @link http://www.whatwg.org/specs/web-apps/current-work/#e-mail-state-(type=email)
*/
return (bool) preg_match('/^[a-zA-Z0-9.!#$%&\'*+\\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}' . '[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/sD', $address);
case 'noregex':
//No PCRE! Do something _very_ approximate!
//Check the address is 3 chars or longer and contains an @ that's not the first or last char
return strlen($address) >= 3 and strpos($address, '@') >= 1 and strpos($address, '@') != strlen($address) - 1;
case 'php':
default:
return (bool) filter_var($address, FILTER_VALIDATE_EMAIL);
}
}