[PHP] 직접 접속 차단하기 (+wget, curl 허용하기)

if (isset($_SERVER['HTTP_USER_AGENT']) && preg_match('/^(curl|wget)/i', $_SERVER['HTTP_USER_AGENT'])) {
      // wget or curl
} else {
      if ($_SERVER['HTTP_REFERER'] == '') {
            exit('Abnormal disconnect: Failed to connect');
      }
}