3v4l.org

run code in 300+ PHP versions simultaneously
<?php $number = 4; $hexString = dechex($number); $result = str_pad($hexString,6,"0",STR_PAD_LEFT); echo($result);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
000004

preferences:
146.11 ms | 403 KiB | 169 Q