3v4l.org

run code in 300+ PHP versions simultaneously
<?php $userCount = 0; $useId = 1; $inputFileName = "test.txt" ?>
Output for 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
preferences:
49.84 ms | 701 KiB | 4 Q