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<?php class A {} class B extends A {} function asd(callable(B, callable(B)) $cb) { $cb(new B, function (B $b) { }); } // first argument can be relaxed, but the one inside callable can not, otherwise when `asd()` // will try to call $cba, it should be able to pass it `callable(B)` (as it was declared in `asd()` signature) // But now that we relaxed requirement in this anon function, `asd()` will have to pass a function with relaxed req. too asd(function (A $a, callable(A) $cba) { });
Output for 5.4.0 - 5.4.39
Parse error: syntax error, unexpected '(', expecting '&' or variable (T_VARIABLE) in /in/Be4Ma on line 6
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '(', expecting '&' or T_VARIABLE in /in/Be4Ma on line 6
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '(', expecting '&' or T_VARIABLE in /in/Be4Ma on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/Be4Ma on line 6
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, expecting ')' in /in/Be4Ma on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/Be4Ma on line 6
Process exited with code 255.
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