81 lines
2.3 KiB
PHP
81 lines
2.3 KiB
PHP
<?php
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/*
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* Copyright (c) 2002-2006 Martin Jansen
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* $Id: CheckIP.php,v 1.8 2006/12/15 17:42:26 mj Exp $
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*/
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/**
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* Class to validate the syntax of IPv4 adresses
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*
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* Usage:
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* <?php
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* require_once "Net/CheckIP.php";
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*
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* if (Net_CheckIP::check_ip("your_ip_goes_here")) {
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* // Syntax of the IP is ok
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* }
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* ?>
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*
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* @author Martin Jansen <mj@php.net>
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* @author Guido Haeger <gh-lists@ecora.de>
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* @package Net_CheckIP
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* @version 1.1
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* @access public
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*/
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class Net_CheckIP
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{
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/**
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* Validate the syntax of the given IP adress
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*
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* This function splits the IP address in 4 pieces
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* (separated by ".") and checks for each piece
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* if it's an integer value between 0 and 255.
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* If all 4 parameters pass this test, the function
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* returns true.
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*
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* @param string $ip IP adress
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* @return bool true if syntax is valid, otherwise false
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*/
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function check_ip($ip)
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{
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$oct = explode('.', $ip);
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if (count($oct) != 4) {
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return false;
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}
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for ($i = 0; $i < 4; $i++) {
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if (!preg_match("/^[0-9]+$/", $oct[$i])) {
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return false;
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}
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if ($oct[$i] < 0 || $oct[$i] > 255) {
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return false;
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}
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}
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return true;
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}
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}
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?>
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