3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface I { public function example($a, $b, $c); } class A implements I { public function example($a, $b = null, $c = null) { } // compatible with I::example } class B extends A { public function example($a, $b, $c = null) { } // compatible with I::example }
Output for 8.5.0 - 8.5.3
Fatal error: Declaration of B::example($a, $b, $c = null) must be compatible with A::example($a, $b = null, $c = null) in /in/pblqI on line 10 Stack trace: #0 {main}
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18
Fatal error: Declaration of B::example($a, $b, $c = null) must be compatible with A::example($a, $b = null, $c = null) in /in/pblqI on line 10
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Fatal error: Declaration of B::example($a, $b, $c = NULL) must be compatible with A::example($a, $b = NULL, $c = NULL) in /in/pblqI on line 10
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Declaration of B::example($a, $b, $c = NULL) must be compatible with A::example($a, $b = NULL, $c = NULL) in /in/pblqI on line 9
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Fatal error: Declaration of A::example() must be compatible with that of I::example() in /in/pblqI on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/pblqI on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/pblqI on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/pblqI on line 3
Process exited with code 255.
preferences:
94.4 ms | 2352 KiB | 4 Q