3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { public function foo() { echo 'foo'; } } class B extends A {} function invoke(callable $callable) { $callable(); } $b = new B(); call_user_func([$b, 'parent::foo']); invoke([$b, 'parent::foo']);
Output for 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Deprecated: Callables of the form ["B", "parent::foo"] are deprecated in /in/FhnmQ on line 14 foo Deprecated: Callables of the form ["B", "parent::foo"] are deprecated in /in/FhnmQ on line 8 Fatal error: Uncaught Error: Call to undefined method B::parent::foo() in /in/FhnmQ:9 Stack trace: #0 /in/FhnmQ(16): invoke(Array) #1 {main} thrown in /in/FhnmQ on line 9
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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
foo Fatal error: Uncaught Error: Call to undefined method B::parent::foo() in /in/FhnmQ:9 Stack trace: #0 /in/FhnmQ(16): invoke(Array) #1 {main} thrown in /in/FhnmQ on line 9
Process exited with code 255.
preferences:
179.48 ms | 403 KiB | 189 Q