79 lines
3.0 KiB
PHP
79 lines
3.0 KiB
PHP
<?php
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// +----------------------------------------------------------------------+
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// | PHP Version 4 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2004 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 3.0 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available at through the world-wide-web at |
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// | http://www.php.net/license/3_0.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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// | obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Authors: Aidan Lister <aidan@php.net> |
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// | Stephan Schmidt <schst@php.net> |
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// +----------------------------------------------------------------------+
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//
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// $Id: strripos.php,v 1.24 2005/08/10 10:19:59 aidan Exp $
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/**
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* Replace strripos()
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*
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* @category PHP
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* @package PHP_Compat
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* @link http://php.net/function.strripos
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* @author Aidan Lister <aidan@php.net>
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* @version $Revision: 1.24 $
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* @since PHP 5
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* @require PHP 4.0.0 (user_error)
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*/
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if (!function_exists('strripos')) {
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function strripos($haystack, $needle, $offset = null)
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{
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// Sanity check
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if (!is_scalar($haystack)) {
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user_error('strripos() expects parameter 1 to be scalar, ' .
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gettype($haystack) . ' given', E_USER_WARNING);
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return false;
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}
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if (!is_scalar($needle)) {
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user_error('strripos() expects parameter 2 to be scalar, ' .
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gettype($needle) . ' given', E_USER_WARNING);
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return false;
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}
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if (!is_int($offset) && !is_bool($offset) && !is_null($offset)) {
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user_error('strripos() expects parameter 3 to be long, ' .
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gettype($offset) . ' given', E_USER_WARNING);
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return false;
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}
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// Initialise variables
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$needle = strtolower($needle);
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$haystack = strtolower($haystack);
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$needle_fc = $needle{0};
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$needle_len = strlen($needle);
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$haystack_len = strlen($haystack);
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$offset = (int) $offset;
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$leftlimit = ($offset >= 0) ? $offset : 0;
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$p = ($offset >= 0) ?
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$haystack_len :
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$haystack_len + $offset + 1;
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// Reverse iterate haystack
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while (--$p >= $leftlimit) {
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if ($needle_fc === $haystack{$p} &&
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substr($haystack, $p, $needle_len) === $needle) {
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return $p;
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}
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}
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return false;
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}
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}
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?>
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