3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface MyInterface{ const SOME_CONST = 'old'; } class Foo implements MyInterface{ const SOME_CONST = 'new'; } $foo = new Foo();
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
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 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 SOME_CONST from interface MyInterface in /in/7ARJX on line 7
Process exited with code 255.
preferences:
161.01 ms | 408 KiB | 5 Q