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<?php function a(callable $callback) { } $r = new ReflectionMethod('a'); var_dump($r->getParameter('callback')->isCallable());
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ReflectionException: ReflectionMethod::__construct(): Argument #1 ($objectOrMethod) must be a valid method name in /in/d3CKD:7 Stack trace: #0 /in/d3CKD(7): ReflectionMethod->__construct('a') #1 {main} thrown in /in/d3CKD on line 7
Process exited with code 255.

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