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<?php class Foo { public function __construct(int $j) { } } class Bar extends Foo { public function __construct(string $j) { } } $ref = new \ReflectionClass(\Bar::class); var_dump($ref->getMethod('__construct')->getPrototype()->getDeclaringClass()->getName());
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ReflectionException: Method Bar::__construct does not have a prototype in /in/qFS4F:24 Stack trace: #0 /in/qFS4F(24): ReflectionMethod->getPrototype() #1 {main} thrown in /in/qFS4F on line 24
Process exited with code 255.

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