3v4l.org

run code in 300+ PHP versions simultaneously
<?php class C { function f($a) { } } class D extends C { function f($a,$b) { } } class E extends C { function f() { } }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Declaration of D::f($a, $b) must be compatible with C::f($a) in /in/GjlTR on line 10
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Warning: Declaration of D::f($a, $b) should be compatible with C::f($a) in /in/GjlTR on line 10 Warning: Declaration of E::f() should be compatible with C::f($a) in /in/GjlTR on line 17
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Warning: Declaration of D::f($a, $b) should be compatible with C::f($a) in /in/GjlTR on line 14 Warning: Declaration of E::f() should be compatible with C::f($a) in /in/GjlTR on line 21
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
Strict Standards: Declaration of D::f() should be compatible with C::f($a) in /in/GjlTR on line 14 Strict Standards: Declaration of E::f() should be compatible with C::f($a) in /in/GjlTR on line 21
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 D::f() should be compatible with that of C::f() in /in/GjlTR on line 14 Strict Standards: Declaration of E::f() should be compatible with that of C::f() in /in/GjlTR on line 21
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9

preferences:
279.96 ms | 402 KiB | 386 Q