3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface Promise { public static function foobar() { print "OK"; } } Promise::foobar();
Output for 7.0.0 - 7.0.16, 7.1.0 - 7.1.2
Fatal error: Interface function Promise::foobar() cannot contain body in /in/FUBL6 on line 4
Process exited with code 255.
preferences:
148.05 ms | 1168 KiB | 6 Q