shuffle 打乱一维数组

<?php

$arr = range(,);

print_r($arr);

echo '<br />';

shuffle($arr);

print_r($arr);

?>

Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 [6] => 7 [7] => 8 )

Array ( [0] => 6 [1] => 1 [2] => 3 [3] => 2 [4] => 5 [5] => 7 [6] => 8 [7] => 4 )