File indexing completed on 2024-06-16 05:29:43 

0001 <?php
0002 
0003 /**
0004  * Validates an IPv4 address
0005  * @author Feyd @ forums.devnetwork.net (public domain)
0006  */
0007 class HTMLPurifier_AttrDef_URI_IPv4 extends HTMLPurifier_AttrDef
0008 {
0009 
0010     /**
0011      * IPv4 regex, protected so that IPv6 can reuse it.
0012      * @type string
0013      */
0014     protected $ip4;
0015 
0016     /**
0017      * @param string $aIP
0018      * @param HTMLPurifier_Config $config
0019      * @param HTMLPurifier_Context $context
0020      * @return bool|string
0021      */
0022     public function validate($aIP, $config, $context)
0023     {
0024         if (!$this->ip4) {
0025             $this->_loadRegex();
0026         }
0027 
0028         if (preg_match('#^' . $this->ip4 . '$#s', $aIP)) {
0029             return $aIP;
0030         }
0031         return false;
0032     }
0033 
0034     /**
0035      * Lazy load function to prevent regex from being stuffed in
0036      * cache.
0037      */
0038     protected function _loadRegex()
0039     {
0040         $oct = '(?:25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]|[0-9])'; // 0-255
0041         $this->ip4 = "(?:{$oct}\\.{$oct}\\.{$oct}\\.{$oct})";
0042     }
0043 }
0044 
0045 // vim: et sw=4 sts=4