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khosb/includes/pear/Compat/Function/strripos.php
2008-11-26 14:50:40 -08:00

82 lines
3.2 KiB
PHP

<?php
// +----------------------------------------------------------------------+
// | PHP Version 4 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2004 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 3.0 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/3_0.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: Aidan Lister <aidan@php.net> |
// | Stephan Schmidt <schst@php.net> |
// +----------------------------------------------------------------------+
//
// $Id: strripos.php,v 1.1 2005/07/23 05:56:03 Tony Exp $
/**
* Replace strripos()
*
* @category PHP
* @package PHP_Compat
* @link http://php.net/function.strripos
* @author Aidan Lister <aidan@php.net>
* @author Stephan Schmidt <schst@php.net>
* @version $Revision: 1.1 $
* @since PHP 5
* @require PHP 4.0.0 (user_error)
*/
if (!function_exists('strripos')) {
function strripos($haystack, $needle, $offset = null)
{
if (!is_scalar($haystack)) {
user_error('strripos() expects parameter 1 to be scalar, ' .
gettype($haystack) . ' given', E_USER_WARNING);
return false;
}
if (!is_scalar($needle)) {
user_error('strripos() expects parameter 2 to be scalar, ' .
gettype($needle) . ' given', E_USER_WARNING);
return false;
}
if (!is_int($offset) && !is_bool($offset) && !is_null($offset)) {
user_error('strripos() expects parameter 3 to be long, ' .
gettype($offset) . ' given', E_USER_WARNING);
return false;
}
// Manipulate the string if there is an offset
$fix = 0;
if (!is_null($offset)) {
// If the offset is larger than the haystack, return
if (abs($offset) >= strlen($haystack)) {
return false;
}
// Check whether offset is negative or positive
if ($offset > 0) {
$haystack = substr($haystack, $offset, strlen($haystack) - $offset);
// We need to add this to the position of the needle
$fix = $offset;
} else {
$haystack = substr($haystack, 0, strlen($haystack) + $offset);
}
}
$segments = explode(strtolower($needle), strtolower($haystack));
$last_seg = count($segments) - 1;
$position = strlen($haystack) + $fix - strlen($segments[$last_seg]) - strlen($needle);
return $position;
}
}
?>