3v4l.org

run code in 300+ PHP versions simultaneously
<?php class PHPlt84 { function bar(int $a = null, array $b) {} } class PHPlt84Child extends PHPlt84 { function bar(?int $a, array $b) {} } class PHPgte71 { function bar(?int $a, array $b) {} } class PHPgte71Child extends PHPgte71 { function bar(int $a = null, array $b) {} }
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7

preferences:
53.74 ms | 402 KiB | 62 Q