3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace B\C { echo B\Z::Foo; echo \B\Z::Foo; } namespace B\C\B { class Z { public const Foo = 1; } } namespace B { class Z { public const Foo = 2; } }
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
12

preferences:
63.17 ms | 402 KiB | 91 Q