REST_Controller::preflight_checks PHP Метод

    protected function preflight_checks()
    {
        // Check to see if PHP is equal to or greater than 5.4.x
        if (is_php('5.4') === FALSE) {
            // CodeIgniter 3 is recommended for v5.4 or above
            throw new Exception('Using PHP v' . PHP_VERSION . ', though PHP v5.4 or greater is required');
        }
        // Check to see if this is CI 3.x
        if (explode('.', CI_VERSION, 2)[0] < 3) {
            throw new Exception('REST Server requires CodeIgniter 3.x');
        }
    }