3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace Test\String { class NotAProblem {} } namespace Test { $test = new String\NotAProblem(); }
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
preferences:
64.91 ms | 1095 KiB | 4 Q