3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface FooInterface { const BAR = ''; } class Foo implements FooInterface { const BAR = 'BAR'; } $baz = new Foo; var_dump($baz::BAR);
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
string(3) "BAR"
Output for 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
Fatal error: Cannot inherit previously-inherited or override constant BAR from interface FooInterface in /in/qVreY on line 8
Process exited with code 255.
Output for 5.6.0 - 5.6.40
Fatal error: Cannot inherit previously-inherited or override constant BAR from interface FooInterface in /in/qVreY on line 9
Process exited with code 255.
preferences:
95.09 ms | 408 KiB | 5 Q