3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { function __construct($a) {} function foo($a) {} } class B extends A { function __construct($a, $b) {} function foo($a, $b) {} }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Declaration of B::foo($a, $b) must be compatible with A::foo($a) in /in/kZSBn on line 15
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Warning: Declaration of B::foo($a, $b) should be compatible with A::foo($a) in /in/kZSBn on line 15
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
Warning: Declaration of B::foo($a, $b) should be compatible with A::foo($a) in /in/kZSBn on line 17
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Strict Standards: Declaration of B::foo() should be compatible with A::foo($a) in /in/kZSBn on line 17
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Strict Standards: Declaration of B::foo() should be compatible with that of A::foo() in /in/kZSBn on line 17
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
preferences:
263.46 ms | 402 KiB | 460 Q