4.4.1 微信基础消息SDK
基础消息的SDK将前面章节的各种接收消息类型进行了处理，另外对被动发送消息类型进行了定义。其代码如下。
1 <?php 2 /* 3 方倍工作室 http:// www.fangbei.org/ 4 CopyRight 2016 All Rights Reserved 5 */ 6 header('Content-type:text'); 7 8 define("TOKEN", "weixin"); 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 // 消息类型分离 46 switch ($RX_TYPE) 47 { 48 case "event": // 事件 49 $result = $this->receiveEvent($postObj); 50 break; 51 case "text": // 文本 52 $result = $this->receiveText($postObj); 53 break; 54 case "image": // 图片 55 $result = $this->receiveImage($postObj); 56 break; 57 case "location": // 位置 58 $result = $this->receiveLocation($postObj); 59 break; 60 case "voice": // 语音 61 $result = $this->receiveVoice($postObj); 62 break; 63 case "video": // 视频 64 case "shortvideo": 65 $result = $this->receiveVideo($postObj); 66 break; 67 case "link": // 链接 68 $result = $this->receiveLink($postObj); 69 break; 70 default: 71 $result = "unknown msg type: ".$RX_TYPE; 72 break; 73 } 74 $this->logger("T /r/n".$result); 75 echo $result; 76 }else { 77 echo ""; 78 exit; 79 } 80 } 81 82 // 接收事件消息 83 private function receiveEvent($object) 84 { 85 $content = ""; 86 switch ($object->Event) 87 { 88 case "subscribe": 89 $content = "欢迎关注方倍工作室 /n请回复以下关键字：文本 表情 单图文 多 图文 音乐/n请按住说话 或 点击 + 再分别发送以下内容：语音 图片 小视频 我的收藏 位置"; 90 break; 91 case "unsubscribe": 92 $content = "取消关注"; 93 break; 94 default: 95 $content = "receive a new event: ".$object->Event; 96 break; 97 } 98 99 if(is_array($content)){100 $result = $this->transmitNews($object, $content);101 }else{102 $result = $this->transmitText($object, $content);103 }104 return $result;105 }106 107 // 接收文本消息108 private function receiveText($object)109 {110 $keyword = trim($object->Content);111 112 if (strstr($keyword, "文本")){ // 回复文本113 $content = "这是个文本消息";114 }else if (strstr($keyword, "表情")){115 $content = "微笑：/::)/n乒乓：/:oo/n中国：".$this->bytes_to_emoji(0x 1F1E8).$this->bytes_to_emoji(0x1F1F3)."/n仙人掌：".$this->bytes_to_emoji(0x1F335);116 }else if (strstr($keyword, "单图文")){ // 回复图文消息117 $content = array;118 $content = array("Title"=>"单图文标题", "Description"=>"单图文内 容", "PicUrl"=>"http:// discuz.comli.com/weixin/weather/icon/cartoon.jpg", "Url" =>"http:// m.cnblogs.com/?u=txw1958");119 }else if (strstr($keyword, "图文") || strstr($keyword, "多图文")){120 $content = array;121 $content = array("Title"=>"多图文1标题", "Description"=>"", "Pic Url"=>"http:// discuz.comli.com/weixin/weather/icon/cartoon.jpg", "Url" => "http:// m.cnblogs.com/?u=txw1958");122 $content = array("Title"=>"多图文2标题", "Description"=>"", "Pic Url"=>"http:// d.hiphotos.bdimg.com/wisegame/pic/item/f3529822720e0cf3ac9f 1ada0846f21fbe09aaa3.jpg", "Url" =>"http:// m.cnblogs.com/?u=txw1958");123 $content = array("Title"=>"多图文3标题", "Description"=>"", "Pic Url"=>"http:// g.hiphotos.bdimg.com/wisegame/pic/item/18cb0a46f21fbe09 0d338acc6a600c338644adfd.jpg", "Url" =>"http:// m.cnblogs.com/?u=txw1958");124 }else if (strstr($keyword, "音乐")){ // 回复音乐消息125 $content = array;126 $content = array("Title"=>"最炫民族风", "Description"=>"歌手：凤凰传 奇", "MusicUrl"=>"http:// mascot-music.stor.sinaapp.com/zxmzf.mp3", "HQMu sicUrl"=>"http:// mascot-music.stor.sinaapp.com/zxmzf.mp3"); 127 }else{128 $content = date("Y-m-d H:i:s",time)."/nOpenID：".$object->FromUser Name."/n技术支持 方倍工作室";129 }130 131 if(is_array($content)){132 if (isset($content[0])){133 $result = $this->transmitNews($object, $content);134 }else if (isset($content['MusicUrl'])){135 $result = $this->transmitMusic($object, $content);136 }137 }else{138 $result = $this->transmitText($object, $content);139 }140 return $result;141 }142 143 // 接收图片消息144 private function receiveImage($object)145 {146 $content = array("MediaId"=>$object->MediaId);147 $result = $this->transmitImage($object, $content);148 return $result;149 }150 151 // 接收位置消息152 private function receiveLocation($object)153 {154 $content = "你发送的是位置，经度为：".$object->Location_Y."；纬度为：".$ob ject->Location_X."；缩放级别为：".$object->Scale."；位置为：".$object->Label;155 $result = $this->transmitText($object, $content);156 return $result;157 }158 159 // 接收语音消息160 private function receiveVoice($object)161 {162 if (isset($object->Recognition) && !empty($object->Recognition)){163 $content = "你刚才说的是：".$object->Recognition;164 $result = $this->transmitText($object, $content);165 }else{166 $content = array("MediaId"=>$object->MediaId);167 $result = $this->transmitVoice($object, $content);168 }169 return $result;170 }171 172 // 接收视频消息173 private function receiveVideo($object)174 {175 $content = array("MediaId"=>$object->MediaId, "ThumbMediaId"=>$object-> ThumbMediaId, "Title"=>"", "Description"=>"");176 $result = $this->transmitVideo($object, $content);177 return $result;178 }179 180 // 接收链接消息181 private function receiveLink($object)182 {183 $content = "你发送的是链接，标题为：".$object->Title."；内容为：".$object-> Description."；链接地址为：".$object->Url;184 $result = $this->transmitText($object, $content);185 return $result;186 }187 188 // 回复文本消息189 private function transmitText($object, $content)190 {191 if (!isset($content) || empty($content)){192 return "";193 }194 195 $xmlTpl = "<xml>196 <ToUserName><![CDATA[%s]]></ToUserName>197 <FromUserName><![CDATA[%s]]></FromUserName>198 <CreateTime>%s</CreateTime>199 <MsgType><![CDATA[text]]></MsgType>200 <Content><![CDATA[%s]]></Content>201 </xml>";202 $result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time, $content);203 204 return $result;205 }206 207 // 回复图文消息208 private function transmitNews($object, $newsArray)209 {210 if(!is_array($newsArray)){211 return "";212 }213 $itemTpl = "<item>214 <Title><![CDATA[%s]]></Title>215 <Description><![CDATA[%s]]></Description>216 <PicUrl><![CDATA[%s]]></PicUrl>217 <Url><![CDATA[%s]]></Url>218 </item>";219 220 $item_str = "";221 foreach ($newsArray as $item){222 $item_str .= sprintf($itemTpl, $item['Title'], $item['Description'], $item['PicUrl'], $item['Url']);223 }224 $xmlTpl = "<xml>225 <ToUserName><![CDATA[%s]]></ToUserName>226 <FromUserName><![CDATA[%s]]></FromUserName>227 <CreateTime>%s</CreateTime>228 <MsgType><![CDATA[news]]></MsgType>229 <ArticleCount>%s</ArticleCount>230 <Articles>231 $item_str </Articles>232 </xml>";233 234 $result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time, count($newsArray));235 return $result;236 }237 238 // 回复音乐消息239 private function transmitMusic($object, $musicArray)240 {241 if(!is_array($musicArray)){242 return "";243 }244 $itemTpl = "<Music>245 <Title><![CDATA[%s]]></Title>246 <Description><![CDATA[%s]]></Description>247 <MusicUrl><![CDATA[%s]]></MusicUrl>248 <HQMusicUrl><![CDATA[%s]]></HQMusicUrl>249 </Music>";250 251 $item_str = sprintf($itemTpl, $musicArray['Title'], $musicArray['Des cription'], $musicArray['MusicUrl'], $musicArray['HQMusicUrl']);252 253 $xmlTpl = "<xml>254 <ToUserName><![CDATA[%s]]></ToUserName>255 <FromUserName><![CDATA[%s]]></FromUserName>256 <CreateTime>%s</CreateTime>257 <MsgType><![CDATA[music]]></MsgType>258 $item_str259 </xml>";260 261 $result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time);262 return $result;263 }264 265 // 回复图片消息266 private function transmitImage($object, $imageArray)267 {268 $itemTpl = "<Image>269 <MediaId><![CDATA[%s]]></MediaId>270 </Image>";271 272 $item_str = sprintf($itemTpl, $imageArray['MediaId']);273 274 $xmlTpl = "<xml>275 <ToUserName><![CDATA[%s]]></ToUserName>276 <FromUserName><![CDATA[%s]]></FromUserName>277 <CreateTime>%s</CreateTime>278 <MsgType><![CDATA[image]]></MsgType>279 $item_str280 </xml>";281 282 $result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time);283 return $result;284 }285 286 // 回复语音消息287 private function transmitVoice($object, $voiceArray)288 {289 $itemTpl = "<Voice>290 <MediaId><![CDATA[%s]]></MediaId>291 </Voice>";292 293 $item_str = sprintf($itemTpl, $voiceArray['MediaId']);294 $xmlTpl = "<xml>295 <ToUserName><![CDATA[%s]]></ToUserName>296 <FromUserName><![CDATA[%s]]></FromUserName>297 <CreateTime>%s</CreateTime>298 <MsgType><![CDATA[voice]]></MsgType>299 $item_str300 </xml>";301 302 $result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time);303 return $result;304 }305 306 // 回复视频消息307 private function transmitVideo($object, $videoArray)308 {309 $itemTpl = "<Video>310 <MediaId><![CDATA[%s]]></MediaId>311 <ThumbMediaId><![CDATA[%s]]></ThumbMediaId>312 <Title><![CDATA[%s]]></Title>313 <Description><![CDATA[%s]]></Description>314 </Video>";315 316 $item_str = sprintf($itemTpl, $videoArray['MediaId'], $videoArray['Thu mbMediaId'], $videoArray['Title'], $videoArray['Description']);317 318 $xmlTpl = "<xml>319 <ToUserName><![CDATA[%s]]></ToUserName>320 <FromUserName><![CDATA[%s]]></FromUserName>321 <CreateTime>%s</CreateTime>322 <MsgType><![CDATA[video]]></MsgType>323 $item_str324 </xml>";325 326 $result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time);327 return $result;328 }329 330 // 日志记录331 private function logger($log_content)332 {333 if(isset($_SERVER['HTTP_APPNAME'])){ // SAE334 sae_set_display_errors(false);335 sae_debug($log_content);336 sae_set_display_errors(true);337 }else if($_SERVER['REMOTE_ADDR'] != "127.0.0.1"){ // LOCAL338 $max_size = 1000000;339 $log_filename = "log.xml";340 if(file_exists($log_filename) and (abs(filesize($log_filename)) > $max_ size)){unlink($log_filename);}341 file_put_contents($log_filename, date('Y-m-d H:i:s')." ".$log_content.| "/r/n", FILE_APPEND);342 }343 }344 }345 ?> 在responseMsg方法中，先提取消息类型$postObj->MsgType，从而实现各种消息类型的分离。在类wechatCallbackapiTest中，为每种消息类型定义了接收方法。在每个方法中，返回消息的主要特征值，组成文本信息作为内容回复。
在接收到文本指令回复文本、图文（包括单图文和多图文）、音乐3种消息时，是使用直接构造相应消息类型实现的，而图片、语音、视频3种消息需要MediaId参数，在这里直接使用用户发送过来的消息中的MediaId，然后组装成响应消息回复。