本文将带你了解微信开发27----客服消息接口基础和推送图文消息，希望本文对大家学微信有所帮助。

按照25课的套路在改下index.php即可实现，代码如下所示：

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)){                /*   libxml_disable_entity_loader is to prevent XML eXternal Entity   Injection,                   the best   way is to check the validity of xml by yourself */                // 使用simplexml技术对xml进行解析                 //   libxml_disable_entity_loader(true), 是从安全性考虑，为了防止xml外部注入，                //只对xml内部实体内容进行解析                  libxml_disable_entity_loader(true);                //加载 postStr 字符串                  $postObj =   simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);                file_put_contents('abc.log',   "\r\n\r\n". $postStr, FILE_APPEND);                $fromUsername =   $postObj->FromUserName;                  file_put_contents('abc.log', "\r\n\r\n". $fromUsername,   FILE_APPEND);                  $toUsername = $postObj->ToUserName;                file_put_contents('abc.log',   "\r\n\r\n". $toUsername, FILE_APPEND);                $keyword =   trim($postObj->Content);                  $time = time();                  global $tmp_arr;                  //根据接收到的消息类型，来进行分支处理(switch)                  switch($postObj->MsgType)                {                    case 'event':                        if($postObj->Event   == 'subscribe')                          {                                                          $contentStr = "欢迎关注leigood微信测试号噢";                            $resultStr =   sprintf($tmp_arr['text'], $fromUsername, $toUsername, $time,   $contentStr);                              echo $resultStr;                         }                                                  //响应用户的点击事件                          if($postObj->Event == 'CLICK'){                              if($postObj->EventKey == 'V1001_TODAY_MUSIC'){   //自定义菜单里面有很多个，这里key是自定义的                                  //这里主要写自己想要的业务逻辑                                $contentStr =   "夺命雷公狗欢迎您来到编程世界";                                $resultStr =   sprintf($tmp_arr['text'], $fromUsername, $toUsername, $time,   $contentStr);                                  echo $resultStr;                             }                        }                                                  break;                    case   'text': //回复文本模块                          //这里开始测试客服消息接口了                          if($keyword == '文本'){                           //获取token                           require   'get_token.php';                             $contentStr = '这是客服接口的回复，我们可以帮助您什么？';                             //对发送的内容进行urlencode编码，防止中文乱码                           $contentStr =   urlencode($contentStr);                             //到时候我们我发送的内容我们放到一个数组里面去了                           $content_arr =   array('content'=>"{$contentStr}");                           //这里的意思是将来我要发送消息给这个用户                           $reply_arr =   array('touser'=>"{$fromUsername}",'msgtype'=>'text','text'=>$content_arr);                           //下一步就是将编码转成规定的json格式                           $post =   json_encode($reply_arr);                             //url解码，如果不解码他将会发来一段二进制代码                           $post =   urldecode($post);                             $url =   "https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token={$access_token}";                             //这里我们来使用类的继承机制，来简化代码                           $this ->   http_request($url,$post);                             //这里是可以回复多条消息的，只需要在执行下这个函数即可                           //$this ->   http_request($url,$post);                                                     }else if($keyword == '图片'){                              //这里的media_id以后是从数据库里面进行查询出来的                            $media_id =   'e9-vVDge44mS0gRN2SbE_oOtY64JVozQBSdkV4SIJnPnJjgRDZTBxrS-YGbd72Z3';                            $content_arr =   array('media_id'=>"{$media_id}");                            $reply_arr =   array('touser'=>"{$fromUsername}",'msgtype'=>'image','image'=>$content_arr);                            $post =   json_encode($reply_arr);                            //引入token值                            $access_token =   $this -> get_token();                              $url =   "https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token={$access_token}";                            //CURL发送                            $this ->   http_request($url,$post);                                                      }else if($keyword == '歌曲'){                            //这里的media_id以后是从数据库里面进行查询出来的                            $media_id =   'y-a1TVDFOrdarZSLI-BYXLWaa-KvKYxO4errfsrPrF-CgNHSUm0tmICsAw1oFkcz';                            $content_arr =   array('media_id'=>"{$media_id}");                            $reply_arr =   array('touser'=>"{$fromUsername}",'msgtype'=>'voice','voice'=>$content_arr);                              //让他进行json格式编码                            $post =   json_encode($reply_arr);                            //引入token值                            $access_token =   $this -> get_token();                            $url =   "https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token={$access_token}";                            //CURL发送                            $this ->   http_request($url,$post);                              //让他推送多一段语音                              $this -> http_request($url,$post);                                                      }else if($keyword == '视频'){                              //这里的media_id以后是从数据库里面进行查询出来的                            $media_id =   '5tkUzLBkiD_wDwEVS05CWp7yXQCHKcHKIWcZUV7Q8pnvwN-WSPBJKRNzgLkaBwLG';                            $title =   '人狗请未了';                              $title = urlencode($title); //必须处理，否则将来是乱码                            $description =   '描述人狗请未了之熟女也喜欢';                              $description = urlencode($description);//必须处理，否则将来是乱码                            $content_arr =   array('media_id'=>"{$media_id}",'title'=>"{$title}",'description'=>"{$description}");                              //手册上还有一个thumb_media_id（缩略图）这个可以不填写，没有大不了就是不显示                            $reply_arr =   array('touser'=>"{$fromUsername}",'msgtype'=>'video','video'=>$content_arr);                            //让他进行json格式编码                            $post =   json_encode($reply_arr);                            //url解码                            $post =   urldecode($post);                              //引入token值                              $access_token = $this -> get_token();                            $url =   "https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token={$access_token}";                            //CURL发送                            $this ->   http_request($url,$post);                            //让他推送多两段视频                            $this ->   http_request($url,$post);                            $this ->   http_request($url,$post);                                                      }else if($keyword == '图文'){                              //以后这些数据都是从数据库里面提取的                            //构造第一个图文                              //温馨提示：如果是单条图文描述才会有用，多图文没用                              //picurl是压缩图，大小为：200*200       大图的是360*200                              $content_arr1 = array(                                  'title'=>urlencode('第一条图文百度'),                                  'description'=>urlencode('描述第一条图文'),                                  'url'=>'//www.baidu.com',                                  'picurl'=>'//weixin.showtp.com/images/a1.png'                                );                            $content_arr2 =   array(                                  'title'=>urlencode('第二条图文谷歌'),                                  'description'=>urlencode('描述第二条图文'),                                  'url'=>'//www.google.com.hk',                                'picurl'=>'//weixin.showtp.com/images/a2.png'                                );                            $content_arr =   array($content_arr1,$content_arr2);                            $content_arr =   array('articles'=>$content_arr);                            $reply_arr =   array('touser'=>"{$fromUsername}",'msgtype'=>'news','news'=>$content_arr);                              //让他进行json格式编码                            $post =   json_encode($reply_arr);                            //url解码                            $post =   urldecode($post);                              //引入token值                              $access_token = $this -> get_token();                            $url =   "https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token={$access_token}";                            //CURL发送                            $this ->   http_request($url,$post);                                                      }else{                              $contentStr = '您输入的格式有误';                            $resultStr =   sprintf($tmp_arr['text'], $fromUsername, $toUsername, $time,   $contentStr);                              echo $resultStr;                          }                        break;                    case 'image':   //处理用户上传图片                          $media_id = $postObj -> MediaId; //获取到用户上传的图片的mediaid                        $resultStr =   sprintf($tmp_arr['image'], $fromUsername, $toUsername, $time,   $media_id);                        echo   $resultStr;                                                  //将图片保存到本地服务器的文件系统                        //1.先给图片创建一个名字                        $image_file_name =   time().'.jpg';                          //2.获取该图片的内容                          $image_file = file_get_contents($postObj->PicUrl);                          //3.保存到本地服务器的文件系统                          //提醒：一定要保证您创建的文件夹是www用户可读可写，否则无法保存该图片到文件夹下                        file_put_contents("./uploadimage/".$image_file_name,$image_file);                                                  //将图片的路径和相关信息入库                          //1.创建一张表                          //2.链接mysql数据库，并且添加图片信息                        $connect = mysql_connect('localhost','root','root');                        mysql_select_db('wxdb',$connect);                        mysql_query('set   names utf8');                          $media_path = "./uploadimage/".$image_file_name; //路径                        $sql = "insert   into keep_image_uploads (id,openid,media_id,media_path)   values(NULL,'{$fromUsername}','{$media_id}','{$media_path}')";                          mysql_query($sql,$connect);                        break;                    case 'voice':   //处理用户上传语言的业务逻辑                          $media_id = $postObj -> MediaId; //获取media_id的id号                        $resultStr =   sprintf($tmp_arr['voice'], $fromUsername, $toUsername, $time,   $media_id);                        echo   $resultStr;                          break;                    case   'location': //处理用户上传的地理位置信息                        $Location_X =   $postObj -> Location_X; //获取上传地理位置的纬度                        $Location_Y =   $postObj -> Location_Y; //获取上传地地理位置经度                        $contentStr =   "您上报的地理位置是:\n经度是：{$Location_Y} \n纬度是: {$Location_X}";                        $resultStr =   sprintf($tmp_arr['text'], $fromUsername, $toUsername, $time,   $contentStr);                          echo $resultStr;                          break;                    case   'link': //接收并回复链接信息                          //获取到用户上传的链接信息                          $Title = $postObj -> Title;                        $Url = $postObj   -> Url;                          $contentStr = "{$Title}";                        $resultStr =   sprintf($tmp_arr['text'], $fromUsername, $toUsername, $time, $contentStr);                        echo $resultStr;                        break;                                        }        }else {            echo "";            exit;        }      }            private function   checkSignature()    {        // you must define TOKEN by yourself        if (!defined("TOKEN"))   {            throw new Exception('TOKEN   is not defined!');        }                $signature =   $_GET["signature"];          $timestamp = $_GET["timestamp"];        $nonce = $_GET["nonce"];                        $token = TOKEN;        $tmpArr = array($token, $timestamp,   $nonce);        // use SORT_STRING rule        sort($tmpArr, SORT_STRING);        $tmpStr = implode( $tmpArr );        $tmpStr = sha1( $tmpStr );                if( $tmpStr == $signature   ){            return true;        }else{            return false;        }      }}//如果这段代码放在上面，那程序将会报错，因为继承的问题，会显示类没有找到$wechatObj = new   wechatCallbackapiTest();//当接入成功后，请注销这句话，否则，会反复验证。//$wechatObj->valid();//添加响应请求的语句$wechatObj->responseMsg();?>

核心代码如下所示：

在开发发送客服消息接口注意以下3点细节即可

1.程序开发时，可以使用网页调试工具先上传视频、声音等多媒体文件

2.客服接口发送消息格式为json格式，因此需要对发送消息的格式进行json编码处理

3.为防止出现中文乱码，需要进行urlencode编码，在使用curl函数post数据时，需要进行urldecode解码，切记。

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