4 * Validates an IPv4 address
5 * @author Feyd @ forums.devnetwork.net (public domain)
7 class HTMLPurifier_AttrDef_URI_IPv4 extends HTMLPurifier_AttrDef
11 * IPv4 regex, protected so that IPv6 can reuse it.
18 * @param HTMLPurifier_Config $config
19 * @param HTMLPurifier_Context $context
22 public function validate($aIP, $config, $context)
28 if (preg_match('#^' . $this->ip4 . '$#s', $aIP)) {
35 * Lazy load function to prevent regex from being stuffed in
38 protected function _loadRegex()
40 $oct = '(?:25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]|[0-9])'; // 0-255
41 $this->ip4 = "(?:{$oct}\\.{$oct}\\.{$oct}\\.{$oct})";