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<?php
//
// +----------------------------------------------------------------------+
// | PHP Version 4 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2002 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/2_02.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Authors: Martin Jansen <mj@php.net> |
// | Guido Haeger <gh-lists@ecora.de> |
// +----------------------------------------------------------------------+
//
// $Id: CheckIP.php,v 1.1.1.1 2005/11/06 15:32:02 b0zz Exp $
/**
* Class to validate the syntax of IPv4 adresses
*
* Usage:
* <?php
* require_once "Net/CheckIP.php";
*
* if (Net_CheckIP::check_ip("your_ip_goes_here")) {
* // Syntax of the IP is ok
* }
* ?>
*
* @author Martin Jansen <mj@php.net>
* @author Guido Haeger <gh-lists@ecora.de>
* @package Net_CheckIP
* @version 1.1
* @access public
*/
class Net_CheckIP
{
/**
* Validate the syntax of the given IP adress
*
* This function splits the IP address in 4 pieces
* (separated by ".") and checks for each piece
* if it's an integer value between 0 and 255.
* If all 4 parameters pass this test, the function
* returns true.
*
* @param string $ip IP adress
* @return bool true if syntax is valid, otherwise false
*/
function check_ip($ip)
{
$oct = explode('.', $ip);
if (count($oct) != 4) {
return false;
}
for ($i = 0; $i < 4; $i++) {
if (!is_numeric($oct[$i])) {
return false;
}
if ($oct[$i] < 0 || $oct[$i] > 255) {
return false;
}
}
return true;
}
}
?>
|
