<?php

/**
 * Validates an IPv4 address
 * @author Feyd @ forums.devnetwork.net (public domain)
 */
class HTMLPurifier_AttrDef_URI_IPv4 extends HTMLPurifier_AttrDef
{
    /**
     * IPv4 regex, protected so that IPv6 can reuse it.
     * @type string
     */
    protected $ip4;

    /**
     * @param string $aIP
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return bool|string
     */
    public function validate($aIP, $config, $context)
    {
        if (!$this->ip4) {
            $this->_loadRegex();
        }

        if (preg_match('#^' . $this->ip4 . '$#s', $aIP)) {
            return $aIP;
        }
        return false;
    }

    /**
     * Lazy load function to prevent regex from being stuffed in
     * cache.
     */
    protected function _loadRegex()
    {
        $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})";
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----Mjc1MDY1OTYyNzY3Nzc0MSA1OTY1NzMyNTEyOTY0ODc3IDIyNzU1MTgwNDczNjQwMjE=