PHP shuffle 函数

定义和用法

• shuffle() 函数把数组中的元素按随机顺序重新排列。
• 该函数为数组中的元素分配新的键名。已有键名将被删除

案例1：

<?php
$my_array = array("red","green","blue","yellow","purple");

shuffle($my_array);
print_r($my_array);
?>
//输出
Array ( [0] => yellow [1] => blue [2] => green [3] => purple [4] => red )

案例2：

<?php
$my_array = array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow","e"=>"purple");

shuffle($my_array);
print_r($my_array);
?>
//输出
Array ( [0] => green [1] => purple [2] => red [3] => yellow [4] => blue )