array_uintersect_uassoc.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 97 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_uintersect_uassoc()
 *
 * @category    PHP
 * @package     PHP_Compat
 * @link        http://php.net/function.array_uintersect_uassoc
 * @author      Aidan Lister <[e-mail]>
 * @version     $Revision$
 * @since       PHP 5
 * @require     PHP 4.0.6 (is_callable)
 */
if (!function_exists('array_uintersect_uassoc')) {
    function array_uintersect_uassoc()
    {
        $args = func_get_args();
        if (count($args) < 4) {
            user_error('Wrong parameter count for array_uintersect_uassoc()',
                E_USER_WARNING);
            return;
        }

        // Get key_compare_func
        $key_compare_func = array_pop($args);
        if (!is_callable($key_compare_func)) {
            if (is_array($key_compare_func)) {
                $key_compare_func = $key_compare_func[0] . '::' . $key_compare_func[1];
            }
            user_error('array_uintersect_uassoc() Not a valid callback ' .
                $key_compare_func, E_USER_WARNING);
            return;
        }

        // Get data_compare_func
        $data_compare_func = array_pop($args);
        if (!is_callable($data_compare_func)) {
            if (is_array($data_compare_func)) {
                $data_compare_func = $data_compare_func[0] . '::' . $data_compare_func[1];
            }
            user_error('array_uintersect_uassoc() Not a valid callback '
            . $data_compare_func, E_USER_WARNING);
            return;
        }

        // Check arrays
        $count = count($args);
        for ($i = 0; $i !== $count; $i++) {
            if (!is_array($args[$i])) {
                user_error('array_uintersect_uassoc() Argument #' .
                    ($i + 1) . ' is not an array', E_USER_WARNING);
                return;
            }
        }

        // Traverse values of the first array
        $intersect = array ();
        foreach ($args[0] as $key => $value) {
            // Check against each array
            for ($i = 1; $i < $count; $i++) {
                // Traverse each element in current array
                foreach ($args[$i] as $ckey => $cvalue) {
                    // Compare key and value
                    if (call_user_func($key_compare_func, $key, $ckey) === 0 && 
                        call_user_func($data_compare_func, $value, $cvalue) === 0)
                    {

                        $intersect[$key] = $value;
                        continue;
                    }
                }
            }
        }

        return $intersect;
    }
}

?>