4 * Primitive email validation class based on the regexp found at
5 * http://www.regular-expressions.info/email.html
7 class HTMLPurifier_AttrDef_URI_Email_SimpleCheck extends HTMLPurifier_AttrDef_URI_Email
10 public function validate($string, $config, $context) {
11 // no support for named mailboxes i.e. "Bob <bob@example.com>"
12 // that needs more percent encoding to be done
13 if ($string == '') return false;
14 $string = trim($string);
15 $result = preg_match('/^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i', $string);
16 return $result ? $string : false;