3v4l.org

run code in 300+ PHP versions simultaneously
<?php // namespace Ns; use Ns\Foo; class Foo {}
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.14, 8.3.0 - 8.3.1
Fatal error: Cannot declare class Foo because the name is already in use in /in/DAT52 on line 7
Process exited with code 255.
preferences:
155.23 ms | 996 KiB | 7 Q