3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace Foo { class Baz {} class Bar {} } namespace Foo { use Bar as Baz; $x = new Baz(); }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.6
Fatal error: Cannot use Bar as Baz because the name is already in use in /in/fU6O6 on line 8
Process exited with code 255.
preferences:
169.16 ms | 1395 KiB | 35 Q