stripos.php.svn-base

来自「PHP 知识管理系统（基于树结构的知识管理系统）, 英文原版的PHP源码。」· SVN-BASE 代码 · 共 73 行

<?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          |
// | [e-mail] so we can mail you a copy immediately.               |
// +----------------------------------------------------------------------+
// | Authors: Aidan Lister <[e-mail]>                                |
// +----------------------------------------------------------------------+
//
// $Id$


/**
 * Replace stripos()
 *
 * @category    PHP
 * @package     PHP_Compat
 * @link        http://php.net/function.stripos
 * @author      Aidan Lister <[e-mail]>
 * @version     $Revision$
 * @since       PHP 5
 * @require     PHP 4.0.0 (user_error)
 */
if (!function_exists('stripos')) {
    function stripos($haystack, $needle, $offset = null)
    {
        if (!is_scalar($haystack)) {
            user_error('stripos() expects parameter 1 to be string, ' .
                gettype($haystack) . ' given', E_USER_WARNING);
            return false;
        }

        if (!is_scalar($needle)) {
            user_error('stripos() needle is not a string or an integer.', E_USER_WARNING);
            return false;
        }

        if (!is_int($offset) && !is_bool($offset) && !is_null($offset)) {
            user_error('stripos() expects parameter 3 to be long, ' .
                gettype($offset) . ' given', E_USER_WARNING);
            return false;
        }

        // Manipulate the string if there is an offset
        $fix = 0;
        if (!is_null($offset)) {
            if ($offset > 0) {
                $haystack = substr($haystack, $offset, strlen($haystack) - $offset);
                $fix = $offset;
            }
        }

        $segments = explode(strtolower($needle), strtolower($haystack), 2);

        // Check there was a match
        if (count($segments) === 1) {
            return false;
        }

        $position = strlen($segments[0]) + $fix;
        return $position;
    }
}

?>