3v4l.org

run code in 300+ PHP versions simultaneously
<?php $t = explode(' ', microtime()); $r = substr($t[1], 3) . rand(111, 999) . substr($t[0], 2, 6); echo dechex($r); $number = 4; $hexString = dechex($number); $result = str_pad($hexString,6,"0",STR_PAD_LEFT); echo($result);

preferences:
25 ms | 402 KiB | 5 Q