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run code in 150+ php & hhvm versions
Bugs & Features
<?php class Base { private function foo($arg) {} } class Child extends Base { public function foo() {} } class Child2 extends Base { private function foo() {} }
Output for 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.14 - 7.1.0
Output for 7.0.0 - 7.0.7
Warning: Declaration of Child::foo() should be compatible with Base::foo($arg) in /in/R02tu on line 8
Output for 5.4.7 - 5.6.22
Strict Standards: Declaration of Child::foo() should be compatible with Base::foo($arg) in /in/R02tu on line 8
Output for 5.4.4 - 5.4.6
Strict Standards: Declaration of Child::foo() should be compatible with Base::foo($arg) in /in/R02tu on line 8 Strict Standards: Declaration of Child2::foo() should be compatible with Base::foo($arg) in /in/R02tu on line 12
Output for 5.4.0 - 5.4.3

Process exited with code 139.
Output for 5.0.0 - 5.3.29
Strict Standards: Declaration of Child::foo() should be compatible with that of Base::foo() in /in/R02tu on line 8 Strict Standards: Declaration of Child2::foo() should be compatible with that of Base::foo() in /in/R02tu on line 12
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/R02tu on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/R02tu on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/R02tu on line 3
Process exited with code 255.