array_chunk.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 72 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 array_combine()
 *
 * @category    PHP
 * @package     PHP_Compat
 * @link        http://php.net/function.array_chunk
 * @author      Aidan Lister <[e-mail]>
 * @author      Thiemo M鋞tig (http://maettig.com)
 * @version     $Revision$
 * @since       PHP 4.2.0
 * @require     PHP 4.0.0 (user_error)
 */
if (!function_exists('array_chunk')) {
    function array_chunk($input, $size, $preserve_keys = false)
    {
        if (!is_array($input)) {
            user_error('array_chunk() expects parameter 1 to be array, ' .
                gettype($input) . ' given', E_USER_WARNING);
            return;
        }

        if (!is_numeric($size)) {
            user_error('array_chunk() expects parameter 2 to be long, ' .
                gettype($size) . ' given', E_USER_WARNING);
            return;
        }

        $size = (int)$size;
        if ($size <= 0) {
            user_error('array_chunk() Size parameter expected to be greater than 0',
                E_USER_WARNING);
            return;
        }

        $chunks = array();
        $i = 0;

        if ($preserve_keys !== false) {
            foreach ($input as $key => $value) {
                $chunks[(int)($i++ / $size)][$key] = $value;
            }
        } else {
            foreach ($input as $value) {
                $chunks[(int)($i++ / $size)][] = $value;
            }
        }

        return $chunks;
    }
}

?>