3v4l.org

run code in 300+ PHP versions simultaneously
<?php $alpha = '1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-'; for ($x=0,$s=null;$x<5;$x++) { $s .= substr(mt_rand(0,strlen($alpha)-1), 1); } echo $s;

preferences:
35.84 ms | 402 KiB | 5 Q