有一些网址可以用来检测在线状态.

This gives a text with the statusname (e.g. away or online)

http://mystatus.skype.com/SKYPENAME.txt

This gives you a numeric skype statuscode (see list below)

http://mystatus.skype.com/SKYPENAME.num

This gives an xml output including numeric statuscode and statustext
in diffent languages

http://mystatus.skype.com/SKYPENAME.xml

At last you have urls which show diffent status icon images:

Replace “smallicon” or “smallclassic” with the image you like.
(Possible values: balloon,bigclassic,smallclassic,smallicon,
mediumicon,dropdown-white,dropdown-trans)

http://mystatus.skype.com/smallicon/SKYPENAME
http://mystatus.skype.com/smallclassic/SKYPENAME
http://mystatus.skype.com/SKYPENAME

在PHP最好的方法是使用我的功能：

/**
   * @version: 1.0 (2014-05-13
   *
   * @param: String $username             Skype Username
   * @param: [String $lang]               Languagecode (possible values 2014-05-13: "en","fr","de","ja","zh-cn","zh-tw","pt","pt-br","it","es","pl","pl"
   * @param: [String $img_time]           Typ im Status Image wich you like to show (Possible values: 2014-05-13: balloon,mediumicon,dropdown-trans)
   *
   * @return array                        "num" = Skype Statuscode,"text" = Statustext (Away" ect.),"img_url" url to Statuscode Image
   */
  function getSkypeStatus($username,$lang = "de",$img_type = "mediumicon")
  {
    $url = "http://mystatus.skype.com/".$username.".xml";
    $data = @file_get_contents($url);

    $status = array();
    if($data === false)
    {
      $status = array("num" =>0,"text"=>"http error"
                );
      if(isset($http_response_header)) $status["error_info"] = $http_response_header;
    }
    else
    {
      $pattern = '/xml:lang="NUM">(.*)</';
      preg_match($pattern,$data,$match);

      $status["num"] = $match[1];

      $pattern = '/xml:lang="' . $lang .'">(.*)</';
      preg_match($pattern,$match);

      $status["text"]    = $match[1];
      $status["img_url"] = "http://mystatus.skype.com/".$img_type."/".$username;
    }
    return $status;
  }

用法：

$status = getSkypeStatus("YourSkypeName"); // Minimal
$status = getSkypeStatus("YourSkypeName","de");  // with defined language for Statustext
$status = getSkypeStatus("YourSkypeName","mediumicon"); // with specified image 

// to display status Icon:

echo '<img src="'.$status["img_url"].'" alt="'.$status["text"].'" title="'.$status["text"].'">';


// or if you like to do you own code for different status

switch($status["num"])
{
  case 7:
  case 2: echo "You are online"; break;
  default: echo "you are offline or in away state";
}

可能的状态消息(英文)是

> http错误：获取api数据的错误,例如互联网问题
>连接未知：未选择或不可用数据.离线：
>用户在线离线：用户在线：
>用户离开不可用：用户不可用不
>打扰：用户是免打扰(DND)
>隐形：用户不可见或显示为离线
> Skype Me：用户在Skype Me中
模式

可能的数字状态码：

> case 0 =未知
> case 1 =离线
>案例2 =在线
>案例3 =离开
>案例4 =不可用
>案例5 =请勿打扰
>案例6 =隐形
> case 7 = Skype我

我上帝这些信息从以下线程：
https://stackoverflow.com/a/16320950/2377961
https://stackoverflow.com/a/6426418/2377961