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run code in 300+ PHP versions simultaneously
<?php class x { function z($a){} } class y extends x { function z(array $a){} }
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 y::z(array $a) must be compatible with x::z($a) in /in/cPb4A on line 10
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Warning: Declaration of y::z(array $a) should be compatible with x::z($a) in /in/cPb4A on line 10
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33
Warning: Declaration of y::z(array $a) should be compatible with x::z($a) in /in/cPb4A on line 11
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Strict Standards: Declaration of y::z() should be compatible with x::z($a) in /in/cPb4A on line 11
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Strict Standards: Declaration of y::z() should be compatible with that of x::z() in /in/cPb4A on line 11
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/cPb4A on line 10
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY, expecting ')' in /in/cPb4A on line 10
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_ARRAY, expecting ')' in /in/cPb4A on line 10
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/cPb4A on line 10
Process exited with code 255.

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