3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface IC {} class C implements IC { public function go() { return true; } } class CC implements IC { public function stop() { return false; } } $c = new CC; $c = null; if ( $c instanceof IC === false || $c->go() === false ) { echo 'Rurro'; }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Rurro
preferences:
172.11 ms | 404 KiB | 181 Q