官方提供的SDK只有一个文本消息功能，我们将所有消息的消息类型及事件响应都整理了进来，并且加入日志记录，代码如下：

更新日志：

2013-01-01 版本1.0，包含Token验证及基本消息接口的收发2014-03-15 增加图片、视频、语音的内容回复2014-04-09 增加菜单链接事件2014-04-10 修改文本回复的判定方法2014-05-20 增加高级群发消息通知事件2014-05-26 增加多客服消息及多客服的判定方法2014-05-27 修改自动回复判定方式2014-06-20 修复多图文回复的Bug2014-07-10 增加第三方接口处理样式2014-08-02 增加Emoji表格的回复处理2014-10-01 增加自定义菜单扫一扫、发图片、发地理位置等接口的处理2014-10-25 增加消息体签名及加解密的支持2014-11-07 增加该公众号暂时无法提供服务请稍后再试的兼容2014-12-20 移除高级群发消息通知事件，必要性不大2015-02-23 移除消息体签名及加解密的支持，必要性不大2015-04-07 优化客服模式和自动回复模式的判定2015-05-16 优化日志记录，兼容SAE和自有主机

  1 <?php  2 /*  3     方倍工作室 http://www.fangbei.org/  4     CopyRight 2015 All Rights Reserved  5 */  6   7 define("TOKEN", "weixin");  8   9 $wechatObj = new wechatCallbackapiTest(); 10 if (!isset($_GET['echostr'])) { 11     $wechatObj->responseMsg(); 12 }else{ 13     $wechatObj->valid(); 14 } 15  16 class wechatCallbackapiTest 17 { 18     //验证签名 19     public function valid() 20     { 21         $echoStr = $_GET["echostr"]; 22         $signature = $_GET["signature"]; 23         $timestamp = $_GET["timestamp"]; 24         $nonce = $_GET["nonce"]; 25         $token = TOKEN; 26         $tmpArr = array($token, $timestamp, $nonce); 27         sort($tmpArr, SORT_STRING); 28         $tmpStr = implode($tmpArr); 29         $tmpStr = sha1($tmpStr); 30         if($tmpStr == $signature){ 31             echo $echoStr; 32             exit; 33         } 34     } 35  36     //响应消息 37     public function responseMsg() 38     { 39         $postStr = $GLOBALS["HTTP_RAW_POST_DATA"]; 40         if (!empty($postStr)){ 41             $this->logger("R \r\n".$postStr); 42             $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA); 43             $RX_TYPE = trim($postObj->MsgType); 44  45             if (($postObj->MsgType == "event") && ($postObj->Event == "subscribe" || $postObj->Event == "unsubscribe")){ 46                 //过滤关注和取消关注事件 47             }else{ 48                  49             } 50              51             //消息类型分离 52             switch ($RX_TYPE) 53             { 54                 case "event": 55                     $result = $this->receiveEvent($postObj); 56                     break; 57                 case "text": 58                    if (strstr($postObj->Content, "第三方")){ 59                         $result = $this->relayPart3("http://www.fangbei.org/test.php".'?'.$_SERVER['QUERY_STRING'], $postStr); 60                     }else{ 61                         $result = $this->receiveText($postObj); 62                     } 63                     break; 64                 case "image": 65                     $result = $this->receiveImage($postObj); 66                     break; 67                 case "location": 68                     $result = $this->receiveLocation($postObj); 69                     break; 70                 case "voice": 71                     $result = $this->receiveVoice($postObj); 72                     break; 73                 case "video": 74                     $result = $this->receiveVideo($postObj); 75                     break; 76                 case "link": 77                     $result = $this->receiveLink($postObj); 78                     break; 79                 default: 80                     $result = "unknown msg type: ".$RX_TYPE; 81                     break; 82             } 83             $this->logger("T \r\n".$result); 84             echo $result; 85         }else { 86             echo ""; 87             exit; 88         } 89     } 90  91     //接收事件消息 92     PRivate function receiveEvent($object) 93     { 94         $content = ""; 95         switch ($object->Event) 96         { 97             case "subscribe": 98                 $content = "欢迎关注方倍工作室 "; 99                 $content .= (!empty($object->EventKey))?("\n来自二维码场景 ".str_replace("qrscene_","",$object->EventKey)):"";100                 break;101             case "unsubscribe":102                 $content = "取消关注";103                 break;104             case "CLICK":105                 switch ($object->EventKey)106                 {107                     case "COMPANY":108                         $content = array();109                         $content[] = array("Title"=>"方倍工作室", "Description"=>"", "PicUrl"=>"http://discuz.comli.com/weixin/weather/icon/cartoon.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");110                         break;111                     default:112                         $content = "点击菜单：".$object->EventKey;113                         break;114                 }115                 break;116             case "VIEW":117                 $content = "跳转链接 ".$object->EventKey;118                 break;119             case "SCAN":120                 $content = "扫描场景 ".$object->EventKey;121                 break;122             case "LOCATION":123                 $content = "上传位置：纬度 ".$object->Latitude.";经度 ".$object->Longitude;124                 break;125             case "scancode_waitmsg":126                 if ($object->ScanCodeInfo->ScanType == "qrcode"){127                     $content = "扫码带提示：类型 二维码 结果：".$object->ScanCodeInfo->ScanResult;128                 }else if ($object->ScanCodeInfo->ScanType == "barcode"){129                     $codeinfo = explode(",",strval($object->ScanCodeInfo->ScanResult));130                     $codeValue = $codeinfo[1];131                     $content = "扫码带提示：类型 条形码 结果：".$codeValue;132                 }else{133                     $content = "扫码带提示：类型 ".$object->ScanCodeInfo->ScanType." 结果：".$object->ScanCodeInfo->ScanResult;134                 }135                 break;136             case "scancode_push":137                 $content = "扫码推事件";138                 break;139             case "pic_sysphoto":140                 $content = "系统拍照";141                 break;142             case "pic_weixin":143                 $content = "相册发图：数量 ".$object->SendPicsInfo->Count;144                 break;145             case "pic_photo_or_album":146                 $content = "拍照或者相册：数量 ".$object->SendPicsInfo->Count;147                 break;148             case "location_select":149                 $content = "发送位置：标签 ".$object->SendLocationInfo->Label;150                 break;151             default:152                 $content = "receive a new event: ".$object->Event;153                 break;154         }155 156         if(is_array($content)){157             if (isset($content[0]['PicUrl'])){158                 $result = $this->transmitNews($object, $content);159             }else if (isset($content['MusicUrl'])){160                 $result = $this->transmitMusic($object, $content);161             }162         }else{163             $result = $this->transmitText($object, $content);164         }165         return $result;166     }167 168     //接收文本消息169     private function receiveText($object)170     {171         $keyWord = trim($object->Content);172         //多客服人工回复模式173         if (strstr($keyword, "请问在吗") || strstr($keyword, "在线客服")){174             $result = $this->transmitService($object);175             return $result;176         }177 178         //自动回复模式179         if (strstr($keyword, "文本")){180             $content = "这是个文本消息";181         }else if (strstr($keyword, "表情")){182             $content = "中国：".$this->bytes_to_emoji(0x1F1E8).$this->bytes_to_emoji(0x1F1F3)."\n仙人掌：".$this->bytes_to_emoji(0x1F335);183         }else if (strstr($keyword, "单图文")){184             $content = array();185             $content[] = array("Title"=>"单图文标题",  "Description"=>"单图文内容", "PicUrl"=>"http://discuz.comli.com/weixin/weather/icon/cartoon.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");186         }else if (strstr($keyword, "图文") || strstr($keyword, "多图文")){187             $content = array();188             $content[] = array("Title"=>"多图文1标题", "Description"=>"", "PicUrl"=>"http://discuz.comli.com/weixin/weather/icon/cartoon.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");189