3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { public function test(string $foo) { } } class B { public function test($foo) { } }
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.21, 8.3.0 - 8.3.9

preferences:
171.8 ms | 404 KiB | 167 Q