3v4l.org

run code in 300+ PHP versions simultaneously
<?php class C { public function f() { echo "C::f\n"; } } class D extends C { public function f() { echo "D::f\n"; } } call_user_func([new D(), 'C::f']);
Output for 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Deprecated: Callables of the form ["D", "C::f"] are deprecated in /in/0od4L on line 15 C::f
Output for 5.4.0 - 5.4.45, 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 - 8.1.27
C::f

preferences:
252.23 ms | 403 KiB | 372 Q