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<?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 1.24 2005/08/10 10:19:59 aidan Exp $
/**
* Replace strripos()
*
* @category PHP
* @package PHP_Compat
* @link http://php.net/function.strripos
* @author Aidan Lister <aidan@php.net>
* @version $Revision: 1.24 $
* @since PHP 5
* @require PHP 4.0.0 (user_error)
*/
if (!function_exists('strripos')) {
function strripos($haystack, $needle, $offset = null)
{
// Sanity check
if (!is_scalar($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;
}
// Initialise variables
$needle = strtolower($needle);
$haystack = strtolower($haystack);
$needle_fc = $needle{0};
$needle_len = strlen($needle);
$haystack_len = strlen($haystack);
$offset = (int) $offset;
$leftlimit = ($offset >= 0) ? $offset : 0;
$p = ($offset >= 0) ?
$haystack_len :
$haystack_len + $offset + 1;
// Reverse iterate haystack
while (--$p >= $leftlimit) {
if ($needle_fc === $haystack{$p} &&
substr($haystack, $p, $needle_len) === $needle) {
return $p;
}
}
return false;
}
}
?>
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