3v4l.org

run code in 300+ PHP versions simultaneously
<?php try { if(PHP_MAJOR_VERSION<7) throw new Exception('PHP 7 required!'); } catch(Exception $e) { echo $e->getMessage(); exit(); } echo "Hi!";
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Hi!
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
PHP 7 required!

preferences:
323.55 ms | 402 KiB | 376 Q