3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_types=1); function hello(int $num = null){ } hello(); hello(1); hello(null);
Output for 7.0.0 - 7.0.20, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Warning: Unsupported declare 'strict_types' in /in/a4VLR on line 2 Catchable fatal error: Argument 1 passed to hello() must be an instance of int, integer given, called in /in/a4VLR on line 8 and defined in /in/a4VLR on line 4
Process exited with code 255.

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218.22 ms | 402 KiB | 266 Q