Arrays und Strings zufällig mischen. PHP-Funktionsanwendungstest

<?php
/**
 * 随机打乱数组、字符串PHP函数应用测试
 * 
 * @author flyer0126
 * @date 2011-12-29
 * 
 */
//随机打乱数组
$arr = array(&#39;1&#39;, &#39;2&#39;, &#39;3&#39;, &#39;4&#39;, &#39;5&#39;, &#39;6&#39;);
print_r($arr);
//Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 ) 
shuffle($arr);
print_r($arr);
//Array ( [0] => 3 [1] => 4 [2] => 1 [3] => 2 [4] => 6 [5] => 5 ) 
//随机打乱字符串
$str = &#39;abcdef&#39;;
echo $str;
//abcdef
$stred = str_shuffle($str);
echo $stred;
//dbafec
?>