3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(isset($_GET['foo'], isset($_GET['baz'])));
Output for 5.6.38, 7.1.0 - 7.1.23, 7.2.0 - 7.2.11
Fatal error: Cannot use isset() on the result of an expression (you can use "null !== expression" instead) in /in/PTLJd on line 3
Process exited with code 255.

preferences:
184.15 ms | 1387 KiB | 44 Q