3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface FooInterface { const BAR = ''; } abstract class AbstractFoo implements FooInterface { } class Foo extends AbstractFoo { const BAR = 'BAR'; } $baz = new Foo; var_dump($baz::BAR);
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.27, 8.0.0 - 8.0.15, 8.1.0 - 8.1.2
string(3) "BAR"

preferences:
17.34 ms | 460 KiB | 5 Q