有没有想过，向一个公众号发送长链接，然后公众号给你回复一个短网址？

其实很简单：

<?php
define("TOKEN", "xiao");
//用于回复用户消息
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;
 $time = time();
 //如果用户发的text类型
 if($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";

 //生成短网址
 $dwzapi = "http://api.t.sina.com.cn/short_url/shorten.json?source=3271760578&url_long=".$key;
 $dwzpost = file_get_contents($dwzapi);
 $dwzjsondecode = json_decode($dwzpost,true);

 //发送
 $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";
 
 //发送
 $contentStr = "请发送链接";
 

 $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
 echo $resultStr;
 exit;
 }

 //如果用户发的event（事件）类型
 if($MsgT=="event"){
 $Event = $postObj->Event;
 if ($Event==subscribe) {
 $contentStr = "欢迎关注";
 }else{
 $contentStr = "希望您下次关注，但您收不到此条消息了";
 }
 $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 "不对";
 exit;
 }
}

 $echoStr = $_GET["echostr"];
 //如果有$echoStr说明是对接
 if (!empty($echoStr)) {
 //对接规则
 $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();
 }
?>

配置方法：

1、登录公众号
2、打开基本配置

3、填写上面代码的url

Token在代码里面自己设置，要对应的，EncodingAESKey随机生成。

4、然后启用这个配置，然后去公众号发送一个url看看！