一、简介
微信公众平台可以根据用户发送的信息进行判断,然后给出对应的回复,具有良好的交互性。下文将模拟简单的回复功能,根据这个案例,开发者也可以基本理解微信交互的原理,进行更深层次的开发。
二、思路分析
用户发送过来的文本信息,我们可以提取关键字,通过简单的 if...elseif...else... 实现。
关键代码如下:
if($keyword=="你好"){ $contentstr = "hello"; }elseif($keyword=="苏州"){ $contentstr = "上有天堂,下有苏杭"; }else{ $contentstr = "感谢您关注【卓锦苏州】 微信号:zhuojinsz"; }
如果用户发送"你好",则回复"hello",如果用户发送"苏州",则回复"上有天堂,下有苏杭",其他信息,则回复你的欢迎词。
三、完整代码
php /** * wechat php test */ //define your token define("token", "zhuojin"); $wechatobj = new wechatcallbackapitest(); $wechatobj->responsemsg(); //$wechatobj->valid(); class wechatcallbackapitest { /*public function valid() { $echostr = $_get["echostr"]; //valid signature , option if($this->checksignature()){ echo $echostr; exit; } }*/ public function responsemsg() { //get post data, may be due to the different environments $poststr = $globals["http_raw_post_data"]; //extract post data if (!empty($poststr)){ $postobj = simplexml_load_string($poststr, 'simplexmlelement', libxml_nocdata); $rx_type = trim($postobj->msgtype); switch($rx_type) { case "text": $resultstr = $this->handletext($postobj); break; case "event": $resultstr = $this->handleevent($postobj); break; default: $resultstr = "unknow msg type: ".$rx_type; break; } echo $resultstr; }else { echo ""; exit; } } public function handletext($postobj) { $fromusername = $postobj->fromusername; $tousername = $postobj->tousername; $keyword = trim($postobj->content); $time = time(); $texttpl = ""; if(!empty( $keyword )) { $msgtype = "text"; if($keyword=="你好"){ $contentstr = "hello"; }elseif($keyword=="苏州"){ $contentstr = "上有天堂,下有苏杭"; }else{ $contentstr = "感谢您关注【卓锦苏州】 微信号:zhuojinsz"; } $resultstr = sprintf($texttpl, $fromusername, $tousername, $time, $msgtype, $contentstr); echo $resultstr; }else{ echo "input something..."; } } public function handleevent($object) { $contentstr = ""; switch ($object->event) { case "subscribe": $contentstr = "感谢您关注【卓锦苏州】"."\n"."微信号:zhuojinsz"."\n"."卓越锦绣,名城苏州,我们为您提供苏州本地生活指南,苏州相关信息查询,做最好的苏州微信平台。"."\n"."目前平台功能如下:"."\n"."【1】 查天气,如输入:苏州天气"."\n"."【2】 查公交,如输入:苏州公交178"."\n"."【3】 翻译,如输入:翻译i love you"."\n"."【4】 苏州信息查询,如输入:苏州观前街"."\n"."更多内容,敬请期待..."; break; default : $contentstr = "unknow event: ".$object->event; break; } $resultstr = $this->responsetext($object, $contentstr); return $resultstr; } public function responsetext($object, $content, $flag=0) { $texttpl = " %s 0 "; $resultstr = sprintf($texttpl, $object->fromusername, $object->tousername, time(), $content, $flag); return $resultstr; } private function checksignature() { $signature = $_get["signature"]; $timestamp = $_get["timestamp"]; $nonce = $_get["nonce"]; $token = token; $tmparr = array($token, $timestamp, $nonce); sort($tmparr); $tmpstr = implode( $tmparr ); $tmpstr = sha1( $tmpstr ); if( $tmpstr == $signature ){ return true; }else{ return false; } } } ?> %s %d