Symfony\Component\HttpKernel\Exception\FlattenException::flattenArgs PHP Method

    protected function flattenArgs($args)
    {
        $result = array();
        foreach ($args as $key => $value) {
            if (is_object($value)) {
                $result[$key] = array('object', get_class($value));
            } elseif (is_array($value)) {
                $result[$key] = array('array', $this->flattenArgs($value));
            } elseif (null === $value) {
                $result[$key] = array('null', null);
            } elseif (is_bool($value)) {
                $result[$key] = array('boolean', $value);
            } elseif (is_resource($value)) {
                $result[$key] = array('resource', '');
            } else {
                $result[$key] = array('string', (string) $value);
            }
        }

        return $result;
    }