3v4l.org

run code in 300+ PHP versions simultaneously

sponsor
bughunt
search
recent
about

@ 2014-03-12T08:10:34Z

<?php
$arr = array();
for ($i=1; $i<=100; $i++) {
    $arr[] = $i;
}
// 乱序
for ($i=0, $max=count($arr)*2; $i<$max; $i++) {
    $r1 = rand(0, 99);
    $r2 = rand(0, 99);
    $temp = $arr[$r1];
    $arr[$r1] = $arr[$r2];
    $arr[$r2] = $temp;
}
var_dump($arr);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
rand: documentation ( source)

preferences:dark modelive preview

32.96 ms | 402 KiB | 5 Q