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<?php class ParentClass implements Countable { public function count(): int { } } class Child extends ParentClass { public function count(): string // it's ok when class implements Countable { } }
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Declaration of Child::count(): string must be compatible with ParentClass::count(): int in /in/lUUH6 on line 14
Process exited with code 255.

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