<?php require_once 'HTMLPurifier/AttrDef.php'; /** * Validates an IPv4 address * @author Feyd @ forums.devnetwork.net (public domain) */ class HTMLPurifier_AttrDef_IPv4 extends HTMLPurifier_AttrDef { /** * IPv4 regex, protected so that IPv6 can reuse it * @protected */ var $ip4; function HTMLPurifier_AttrDef_IPv4() { $oct = '(?:25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]|[0-9])'; // 0-255 $this->ip4 = "(?:{$oct}\\.{$oct}\\.{$oct}\\.{$oct})"; } function validate($aIP, $config, &$context) { if (preg_match('#^' . $this->ip4 . '$#s', $aIP)) { return $aIP; } return false; } } ?>