有沒有想過，向一個公眾號發送長鏈接，然后公眾號給你回復一個短網址？

其實很簡單：

<?phpdefine("TOKEN", "xiao");//用于回復用戶消息function responseMsg(){  $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];  if (!empty($postStr)){    $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);    $fromUsername = $postObj->FromUserName;    $toUsername = $postObj->ToUserName;    $MsgT = $postObj->MsgType;    $time = time();    //如果用戶發的text類型    if($MsgT=="text"){      $key = trim($postObj->Content);      $textTpl = "<xml>            <ToUserName><![CDATA[%s]]></ToUserName>            <FromUserName><![CDATA[%s]]></FromUserName>            <CreateTime>%s</CreateTime>            <MsgType><![CDATA[%s]]></MsgType>            <Content><![CDATA[%s]]></Content>            </xml>";       $msgType = "text";      //生成短網址      $dwzapi = "http://api.t.sina.com.cn/short_url/shorten.json?source=3271760578&url_long=".$key;      $dwzpost = file_get_contents($dwzapi);      $dwzjsondecode = json_decode($dwzpost,true);      //發送      $contentStr = $dwzjsondecode[0]['url_short'];            $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);      echo $resultStr;      exit;    }else{      $textTpl = "<xml>            <ToUserName><![CDATA[%s]]></ToUserName>            <FromUserName><![CDATA[%s]]></FromUserName>            <CreateTime>%s</CreateTime>            <MsgType><![CDATA[%s]]></MsgType>            <Content><![CDATA[%s]]></Content>            </xml>";       $msgType = "text";          //發送      $contentStr = "請發送鏈接";            $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);      echo $resultStr;      exit;    }    //如果用戶發的event（事件）類型    if($MsgT=="event"){      $Event = $postObj->Event;      if ($Event==subscribe) {        $contentStr = "歡迎關注";      }else{        $contentStr = "希望您下次關注，但您收不到此條消息了";      }      $textTpl = "<xml>            <ToUserName><![CDATA[%s]]></ToUserName>            <FromUserName><![CDATA[%s]]></FromUserName>            <CreateTime>%s</CreateTime>            <MsgType><![CDATA[%s]]></MsgType>            <Content><![CDATA[%s]]></Content>            </xml>";       $Title = $postObj->Title;      $Description = $postObj->Description;      $Url = $postObj->Url;      $msgType = 'text';      $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);      echo $resultStr;      exit;    }  }else{      echo "不對";      exit;  }}  $echoStr = $_GET["echostr"];  //如果有$echoStr說明是對接  if (!empty($echoStr)) {    //對接規則    $signature = $_GET["signature"];    $timestamp = $_GET["timestamp"];    $nonce = $_GET["nonce"];    $token = TOKEN;    $tmpArr = array($token, $timestamp, $nonce);    sort($tmpArr, SORT_STRING);    $tmpStr = implode( $tmpArr );    $tmpStr = sha1( $tmpStr );    if( $tmpStr == $signature ){      echo $echoStr;    }else{      echo "";      exit;    }  }else{    responseMsg();  }?>