3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace Foo; class Baz {} class Bar {} namespace Foo; use Foo\Bar as Baz; $x = new Baz();
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.6
Fatal error: Cannot use Foo\Bar as Baz because the name is already in use in /in/V23TG on line 7
Process exited with code 255.
preferences:
169.58 ms | 1395 KiB | 35 Q