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<?php abstract class A { abstract function lol(string $a = null); } class B extends A { function lol(?string $a) { var_dump("asddsa"); return []; } } var_dump((new B())->lol( "asd"));
Output for 7.1.0 - 7.1.7
Fatal error: Declaration of B::lol(?string $a) must be compatible with A::lol(?string $a = NULL) in /in/vNgsF on line 12
Process exited with code 255.
Output for 7.0.0 - 7.0.20
Parse error: syntax error, unexpected '?', expecting variable (T_VARIABLE) in /in/vNgsF on line 8
Process exited with code 255.
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