3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; $len = strlen($s); $m = ''; for ($i = 0; $i < $length; $i ++) { $m .= $s[mt_rand(0, $len -1)]; } return $m;

preferences:
36.07 ms | 402 KiB | 5 Q