File xoops_lib\modules\protector\library\HTMLPurifier\AttrDef\URI\IPv4.php

1:	<?php
2:
3:	/**
4:	* Validates an IPv4 address
5:	* @author Feyd @ forums.devnetwork.net (public domain)
6:	*/
7:	class HTMLPurifier_AttrDef_URI_IPv4 extends HTMLPurifier_AttrDef
8:	{
9:
10:	/**
11:	* IPv4 regex, protected so that IPv6 can reuse it.
12:	* @type string
13:	*/
14:	protected $ip4;
15:
16:	/**
17:	* @param string $aIP
18:	* @param HTMLPurifier_Config $config
19:	* @param HTMLPurifier_Context $context
20:	* @return bool\|string
21:	*/
22:	public function validate($aIP, $config, $context)
23:	{
24:	if (!$this->ip4) {
25:	$this->_loadRegex();
26:	}
27:
28:	if (preg_match('#^' . $this->ip4 . '$#s', $aIP)) {
29:	return $aIP;
30:	}
31:	return false;
32:	}
33:
34:	/**
35:	* Lazy load function to prevent regex from being stuffed in
36:	* cache.
37:	*/
38:	protected function _loadRegex()
39:	{
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})";
42:	}
43:	}
44:
45:	// vim: et sw=4 sts=4
46: