Ouzo\Request\RequestHeaders::ip PHP Метод

    public static function ip()
    {
        $ip = Arrays::getValue($_SERVER, 'HTTP_CLIENT_IP');
        if (!$ip) {
            $ip = Arrays::getValue($_SERVER, 'HTTP_X_FORWARDED_FOR');
        }
        if (!$ip) {
            $ip = Arrays::getValue($_SERVER, 'REMOTE_ADDR');
        }
        return $ip;
    }

 /**
  * @test
  */
 public function shouldReturnIpFromREMOTE_ADDR()
 {
     //given
     $_SERVER['REMOTE_ADDR'] = '10.170.12.53';
     //when
     $ip = RequestHeaders::ip();
     //then
     $this->assertEquals('10.170.12.53', $ip);
 }