1、首先需要一个可以外网访问的接口url。
我这里是申请的新浪免费云服务器，http://xxxxx.applinzi.com/wx.php,具体自己可以去新浪云中心申请地址为：http://www.sinacloud.com
2、去微信公众账号申请个人的公众账号，地址为：https://mp.weixin.qq.com，然后进入到左侧菜单开发里面选择基本配置。
3、点击修改配置，填写必要的信息，认证如下图：
需要在wx.php里面写入认证代码，具体代码下文会提供。
4、等待认证成功后，启用配置
附详细代码：
1 <?php 2 header(‘Content-type:text/html;charset=utf-8‘); 3 define("TOKEN", "这里是你在微信那里的token"); 4 $wechatObj = new wechatCallbackapiTest(); 5 $wechatObj->valid(); 6 7 class wechatCallbackapiTest { 8 public function valid() 9 { 10
//这里是认证过程
$echoStr = $_GET["echostr"]; 11 if($this->checkSignature() && $echoStr) { 12 echo $echoStr; 13 exit; 14 } else { 15 $this->responseMsg();//当认证成功后执行下面的代码 16 } 17 } 18 19 private function responseMsg() { 20 21 $postStr = $GLOBALS["HTTP_RAW_POST_DATA"]; 22 if (!empty($postStr)) { 23 libxml_disable_entity_loader(true); 24 $textTpl = "<xml> 25 <ToUserName><![CDATA[%s]]></ToUserName> 26 <FromUserName><![CDATA[%s]]></FromUserName> 27 <CreateTime>%s</CreateTime> 28 <MsgType><![CDATA[%s]]></MsgType> 29 <Content><![CDATA[%s]]></Content> 30 <FuncFlag>0</FuncFlag> 31 </xml>"; 32 $postObj = simplexml_load_string($postStr, ‘SimpleXMLElement‘, LIBXML_NOCDATA); 33 //第一次关注的时候 34 if (strtolower($postObj->MsgType) == ‘event‘) { 35 if (strtolower($postObj->Event) == ‘subscribe‘) { 36 $toUsername = $postObj->ToUserName; 37 $fromUsername = $postObj->FromUserName; 38 $time = time(); 39 $msgType = "text"; 40 $contentStr = "<<Welcome attention to life is elsewhere!>>"; 41 $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr); 42 echo $resultStr; 43 } 44 //关键字文本回复 45 } else if ( strtolower($postObj->MsgType) == ‘text‘ ) { 46 if ( $postObj->Content == ‘imooc‘ ) { 47 $toUsername = $postObj->ToUserName; 48 $fromUsername = $postObj->FromUserName; 49 $time = time(); 50 $msgType = "text"; 51 $contentStr = "imooc is very good"; 52 $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr); 53 echo $resultStr; 54 exit; 55 } else if ( $postObj->Content == ‘美丽说‘ ) { 56 $array = array( 57 array( 58 ‘title‘ => ‘meilishuo‘, 59 ‘description‘=> ‘meilishuo is very good‘, 60 ‘picurl‘ => ‘http://d05.res.meilishuo.net/img/_o/67/24/65bc4ebfe22d0c2eca1702c9736c_117_43.ch.png‘, 61 ‘url‘ => ‘http://www.meilishuo.com‘ 62 ) 63 ); 64 $imageTpl = "<xml> 65 <ToUserName><![CDATA[%s]]></ToUserName> 66 <FromUserName><![CDATA[%s]]></FromUserName> 67 <CreateTime>%s</CreateTime> 68 <MsgType><![CDATA[%s]]></MsgType> 69 <ArticleCount>".count($array)."</ArticleCount> 70 <Articles>"; 71 foreach ($array as $key => $value) { 72 $imageTpl .= 73 "<item> 74 <Title><![CDATA[".$value[‘title‘]."]]></Title> 75 <Description><![CDATA[".$value[‘description‘]."]]></Description> 76 <PicUrl><![CDATA[".$value[‘picurl‘]."]]></PicUrl> 77 <Url><![CDATA[".$value[‘url‘]."]]></Url> 78 </item>"; 79 } 80 $imageTpl .= "</Articles></xml>"; 81 $toUsername = $postObj->ToUserName; 82 $fromUsername = $postObj->FromUserName; 83 $time = time(); 84 $msgType = "news"; 85 $resultStr = sprintf($imageTpl, $fromUsername, $toUsername, $time, $msgType); 86 echo $resultStr; 87 exit; 88 } 89 } 90 91 } else { 92 echo ""; 93 exit; 94 } 95 96 } 97 98 private function checkSignature() { 99 if (!defined("TOKEN")) { 100 throw new Exception(‘TOKEN is not defined!‘); 101 } 102 103 $signature = $_GET["signature"]; 104 $timestamp = $_GET["timestamp"]; 105 $nonce = $_GET["nonce"]; 106 $token = TOKEN; 107 $tmpArr = array($token, $timestamp, $nonce); 108 sort($tmpArr, SORT_STRING); 109 $tmpStr = implode( $tmpArr ); 110 $tmpStr = sha1( $tmpStr ); 111 return ($tmpStr == $signature) ? true : false; 112 } 113 }