<?php require_once 'HTMLPurifier/AttrDef/URI/Email.php'; /** * Primitive email validation class based on the regexp found at * http://www.regular-expressions.info/email.html */ class HTMLPurifier_AttrDef_URI_Email_SimpleCheck extends HTMLPurifier_AttrDef_URI_Email { function validate($string, $config, &$context) { // no support for named mailboxes i.e. "Bob <bob@example.com>" // that needs more percent encoding to be done if ($string == '') return false; $string = trim($string); $result = preg_match('/^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i', $string); return $result ? $string : false; } }