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<?php class a { function m($a = null) {} } class b extends a { function m($b) { } }
Output for 8.5.0 - 8.5.3
Fatal error: Declaration of b::m($b) must be compatible with a::m($a = null) in /in/3imT8 on line 8 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::m($b) must be compatible with a::m($a = null) in /in/3imT8 on line 8
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Warning: Declaration of b::m($b) should be compatible with a::m($a = NULL) in /in/3imT8 on line 8
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.1.20 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Warning: Declaration of b::m($b) should be compatible with a::m($a = NULL) in /in/3imT8 on line 11
Output for 7.1.10

Process exited with code 137.
Output for 5.6.0 - 5.6.29
Strict Standards: Declaration of b::m() should be compatible with a::m($a = NULL) in /in/3imT8 on line 11

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