private function getParameters(callable $callback)
    {
        if (is_array($callback)) {
            $mirror = new ReflectionMethod($callback[0], $callback[1]);
        } elseif (is_object($callback) && !$callback instanceof \Closure) {
            /** @var object $callback */
            $mirror = new ReflectionObject($callback);
            $mirror = $mirror->getMethod('__invoke');
        } else {
            $mirror = new ReflectionFunction($callback);
        }

        return $mirror->getParameters();
    }
private function getParameters(callable $callback)
    {
        if (is_array($callback)) {
            $mirror = new ReflectionMethod($callback[0], $callback[1]);
        } elseif (is_object($callback) && !$callback instanceof \Closure) {
            /** @var object $callback */
            $mirror = new ReflectionObject($callback);
            $mirror = $mirror->getMethod('__invoke');
        } else {
            $mirror = new ReflectionFunction($callback);
        }

        return $mirror->getParameters();
    }
private function getParameters ( callable $ callback ) { if ( is_array ( $ callback ) ) { $ mirror = new ReflectionMethod ( $ callback [ 0 ] , $ callback [ 1 ] ) ; } elseif ( is_object ( $ callback ) && ! $ callback instanceof \ Closure ) { /** @var object $callback */ $ mirror = new ReflectionObject ( $ callback ) ; $ mirror = $ mirror -> getMethod ( '__invoke' ) ; } else { $ mirror = new ReflectionFunction ( $ callback ) ; } return $ mirror -> getParameters ( ) ; }
Get the callback function's parameters.

@param callable $callback

@return ReflectionParameter[]
Get the callback function s parameters .