3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface StreamInterfaceA extends StreamInterfaceB { public function write($data); } interface StreamInterfaceB { public function write($data); } class Stream implements StreamInterfaceA { public function write($data) { echo $data; } } function outputStreamInterfaceB(StreamInterfaceB $stream) { $stream->write('hello world'); } $stream = new Stream(); outputStreamInterfaceB($stream);
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
hello world
preferences:
241.31 ms | 404 KiB | 332 Q