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<?php class ParentClassBackCompat { public function walk($param1, $param2) {} } class ChildClassBackCompat extends ParentClassBackCompat { function walk($param1, $param2, ...$spread) {} } class ParentClass { public function walk($param1, $param2, ...$spread) {} } class ChildClass extends ParentClass { function walk($param1, $param2, $param3, ...$spread) {} }
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Declaration of ChildClass::walk($param1, $param2, $param3, ...$spread) must be compatible with ParentClass::walk($param1, $param2, ...$spread) in /in/5oNs4 on line 16
Process exited with code 255.

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