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<?php abstract class A { abstract function lol(...$args); } class B extends A { function lol(bool $a, string $c) : array{ var_dump("asddsa"); return []; } } var_dump((new B())->lol(true, "asd"));

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Output for Arrow functions
Fatal error: Declaration of B::lol(bool $a, string $c): array must be compatible with A::lol(...$args) in /in/SscP9 on line 12

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