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45 lines
998 B
45 lines
998 B
<?php |
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/** |
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* Validates an IPv4 address |
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* @author Feyd @ forums.devnetwork.net (public domain) |
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*/ |
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class HTMLPurifier_AttrDef_URI_IPv4 extends HTMLPurifier_AttrDef |
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{ |
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/** |
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* IPv4 regex, protected so that IPv6 can reuse it. |
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* @type string |
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*/ |
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protected $ip4; |
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/** |
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* @param string $aIP |
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* @param HTMLPurifier_Config $config |
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* @param HTMLPurifier_Context $context |
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* @return bool|string |
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*/ |
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public function validate($aIP, $config, $context) |
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{ |
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if (!$this->ip4) { |
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$this->_loadRegex(); |
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} |
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if (preg_match('#^' . $this->ip4 . '$#s', $aIP)) { |
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return $aIP; |
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} |
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return false; |
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} |
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/** |
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* Lazy load function to prevent regex from being stuffed in |
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* cache. |
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*/ |
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protected function _loadRegex() |
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{ |
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$oct = '(?:25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]|[0-9])'; // 0-255 |
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$this->ip4 = "(?:{$oct}\\.{$oct}\\.{$oct}\\.{$oct})"; |
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} |
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} |
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// vim: et sw=4 sts=4
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