Symfony\Component\HttpKernel\DataCollector\RequestDataCollector::parseController PHP Method

    protected function parseController($controller)
    {
        if (is_string($controller) && false !== strpos($controller, '::')) {
            $controller = explode('::', $controller);
        }

        if (is_array($controller)) {
            try {
                $r = new \ReflectionMethod($controller[0], $controller[1]);

                return array(
                    'class' => is_object($controller[0]) ? get_class($controller[0]) : $controller[0],
                    'method' => $controller[1],
                    'file' => $r->getFileName(),
                    'line' => $r->getStartLine(),
                );
            } catch (\ReflectionException $e) {
                if (is_callable($controller)) {
                    // using __call or  __callStatic
                    return array(
                        'class' => is_object($controller[0]) ? get_class($controller[0]) : $controller[0],
                        'method' => $controller[1],
                        'file' => 'n/a',
                        'line' => 'n/a',
                    );
                }
            }
        }

        if ($controller instanceof \Closure) {
            $r = new \ReflectionFunction($controller);

            return array(
                'class' => $r->getName(),
                'method' => null,
                'file' => $r->getFileName(),
                'line' => $r->getStartLine(),
            );
        }

        if (is_object($controller)) {
            $r = new \ReflectionClass($controller);

            return array(
                'class' => $r->getName(),
                'method' => null,
                'file' => $r->getFileName(),
                'line' => $r->getStartLine(),
            );
        }

        return is_string($controller) ? $controller : 'n/a';
    }