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<?php class A { public function x($id = null) { } } class B extends A { public function x() { } } $b = new B();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Declaration of B::x() must be compatible with A::x($id = null) in /in/SRAdX on line 10
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Warning: Declaration of B::x() should be compatible with A::x($id = NULL) in /in/SRAdX on line 10
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33
Warning: Declaration of B::x() should be compatible with A::x($id = NULL) in /in/SRAdX on line 13
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Strict Standards: Declaration of B::x() should be compatible with A::x($id = NULL) in /in/SRAdX on line 13

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