微信公众平台开发 多客服

在这篇微信公众平台开发教程中，我们将介绍如何使用开发模式实现多客服系统。

本文分为以下三个部分：

回复多客服消息

触发多客服会话

其他说明

一、回复多客服消息

在新的微信协议中，开发模式也可以接入客服系统。 开发者如果需要让用户使用客服系统，需要在接收到用户发送的消息时，返回一个MsgType为transfer_customer_service的消息，微信服务器在收到这条消息时，会把用户这次发送的和以后一段时间内发送的消息转发客服系统。

返回的消息举例如下<xml><ToUserName><![CDATA[touser]]></ToUserName><FromUserName><![CDATA[fromuser]]></FromUserName><CreateTime>1399197672</CreateTime><MsgType><![CDATA[transfer_customer_service]]></MsgType></xml>该消息的实现如下//回复多客服消息private function transmitService($object){$xmlTpl = "<xml><ToUserName><![CDATA[%s]]></ToUserName><FromUserName><![CDATA[%s]]></FromUserName><CreateTime>%s</CreateTime><MsgType><![CDATA[transfer_customer_service]]></MsgType></xml>";$result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time());return $result;}二、触发多客服会话

一般情况下，用户想要咨询问题是，经常会问“你好”，“在吗”，这样的问题。

我们以这些词为触发关键词，当用户发送的文本消息内容中包含这些词的时候，就返回多客服消息给用户（用户在微信端感觉不到任何内容，但微信公众账号会将用户本次及以后一段时间的消息都转发到客服）。

实现代码如下：//接收文本消息private function receiveText($object){$keyword = trim($object->Content);if (strstr($keyword, "投诉") || strstr($keyword, "你好") || strstr($keyword, "在吗")){$result = $this->transmitService($object);}return $result;}三、完整代码<?phpdefine("TOKEN", "weixin");$wechatObj = new wechatCallbackapiTest();if (!isset($_GET['echostr'])) {$wechatObj->responseMsg();}else{$wechatObj->valid();}class wechatCallbackapiTest{//验证消息public function valid(){$echoStr = $_GET["echostr"];if($this->checkSignature()){echo $echoStr;exit;}}//检查签名private function checkSignature(){$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 == $signature){return true;}else{return false;}}//响应消息public function responseMsg(){$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];if (!empty($postStr)){$this->logger("R ".$postStr);$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);$RX_TYPE = trim($postObj->MsgType);switch ($RX_TYPE){case "event":$result = $this->receiveEvent($postObj);break;case "text":$result = $this->receiveText($postObj);break;}$this->logger("T ".$result);echo $result;}else {echo "";exit;}}//接收事件消息private function receiveEvent($object){switch ($object->Event){case "subscribe":$content[] = array("Title" =>"欢迎关注方倍工作室", "Description" =>"使用方法：n1.发送快递单号,例如6367532560,可查询快递详情", "PicUrl" =>"http://www.3856.cc/weixin/weixin/logo.jpg", "Url" =>"");break;default:$content = "receive a new event: ".$object->Event;break;}if(is_array($content)){if (isset($content[0])){$result = $this->transmitNews($object, $content);}else if (isset($content['MusicUrl'])){$result = $this->transmitMusic($object, $content);}}else{$result = $this->transmitText($object, $content);}return $result;}//接收文本消息private function receiveText($object){$keyword = trim($object->Content);if($keyword == "时间" || $keyword == "测试"){$content = date("Y-m-d H:i:s",time());$result = $this->transmitText($object, $content);}//触发多客服模式else if (strstr($keyword, "您好") || strstr($keyword, "你好") || strstr($keyword, "在吗") || strstr($keyword, "有人吗")){$result = $this->transmitService($object);return $result;}return $result;}private function transmitText($object, $content){$textTpl = "<xml><ToUserName><![CDATA[%s]]></ToUserName><FromUserName><![CDATA[%s]]></FromUserName><CreateTime>%s</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[%s]]></Content></xml>";$result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content);return $result;}private function transmitNews($object, $newsArray){if(!is_array($newsArray)){return;}$itemTpl = "<item><Title><![CDATA[%s]]></Title><Description><![CDATA[%s]]></Description><PicUrl><![CDATA[%s]]></PicUrl><Url><![CDATA[%s]]></Url></item>";$item_str = "";foreach ($newsArray as $item){$item_str .= sprintf($itemTpl, $item['Title'], $item['Description'], $item['PicUrl'], $item['Url']);}$newsTpl = "<xml><ToUserName><![CDATA[%s]]></ToUserName><FromUserName><![CDATA[%s]]></FromUserName><CreateTime>%s</CreateTime><MsgType><![CDATA[news]]></MsgType><Content><![CDATA[]]></Content><ArticleCount>%s</ArticleCount><Articles>$item_str</Articles></xml>";$result = sprintf($newsTpl, $object->FromUserName, $object->ToUserName, time(), count($newsArray));return $result;}private function transmitMusic($object, $musicArray){$itemTpl = "<Music><Title><![CDATA[%s]]></Title><Description><![CDATA[%s]]></Description><MusicUrl><![CDATA[%s]]></MusicUrl><HQMusicUrl><![CDATA[%s]]></HQMusicUrl></Music>";$item_str = sprintf($itemTpl, $musicArray['Title'], $musicArray['Description'], $musicArray['MusicUrl'], $musicArray['HQMusicUrl']);$textTpl = "<xml><ToUserName><![CDATA[%s]]></ToUserName><FromUserName><![CDATA[%s]]></FromUserName><CreateTime>%s</CreateTime><MsgType><![CDATA[music]]></MsgType>$item_str</xml>";$result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time());return $result;}//回复多客服消息private function transmitService($object){$xmlTpl = "<xml><ToUserName><![CDATA[%s]]></ToUserName><FromUserName><![CDATA[%s]]></FromUserName><CreateTime>%s</CreateTime><MsgType><![CDATA[transfer_customer_service]]></MsgType></xml>";$result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time());return $result;}private function logger($log_content){if(isset($_SERVER['HTTP_APPNAME'])){//SAEsae_set_display_errors(false);sae_debug($log_content);sae_set_display_errors(true);}else if($_SERVER['REMOTE_ADDR'] != "127.0.0.1"){ //LOCAL$max_size = 10000;$log_filename = "log.xml";if(file_exists($log_filename) and (abs(filesize($log_filename)) > $max_size)){unlink($log_filename);}file_put_contents($log_filename, date('H:i:s')." ".$log_content."rn", FILE_APPEND);}}}?>四、其他注意事项

1. 经测试，在自定义菜单中返回多客服消息，无法让用户进入多客服状态。

2. 使用多客服消息后，后续所有消息在一段时间内都将作为客服消息转发，原来的开发模式下的自动回复都将失效！！！

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