之前尝试开发的过程中,遇到了很多困难,究其原因,还是对代码原理不甚了解,也没学过php相关知识,于是打算回过头来,一步一步再浅析一下相关文件。
weixin.class文件主要作用是自动回复消息,我不是用上一篇推荐的SDK版本,可能现在用的这个版本更合我胃口,也更好理解,具体解析写在代码注释里吧。
<?php
require 'weixin.config.php';
$wechatObj = new wechatCallbackapiTest();
//没有得到echostr 先验证
if (!isset($_GET['echostr'])) {
$wechatObj->responseMsg(); //处理消息
}else{
$wechatObj->valid();
}
/*$code = $_GET["code"];
$userinfo = getopenidtoken($code);
$StrOpenid=$userinfo["openid"];
*/
class wechatCallbackapiTest
{
//验证消息
public function valid()
{
$echoStr = $_GET["echostr"];
if($this->checkSignature()){
echo $echoStr;
exit;
}
}
//上述消息验证似乎还有很多方法,具体原理我也不是很清楚,暂时存疑。
//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,这部分内容是用来对消息进行分类,以便用不同的类来响应。这样写代码封装性更好一些。
public function responseMsg()
{
$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
if (!empty($postStr)){
$this->logger("R ".$postStr); //日志文件(R)
$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA); //获得对象信息
$RX_TYPE = trim($postObj->MsgType);
switch ($RX_TYPE)
{
case "event": //处理点击事件
$result = $this->receiveEvent($postObj); //返回信息
break;
case "text": //处理文本信息
$result = $this->receiveText($postObj);
break;
case "image": //处理图片
$result = $this->receiveImage($postObj);
break;
case "location": //地理位置消息
$result = $this->receiveLocation($postObj);
break;
case "voice": //处理声音
$result = $this->receiveVoice($postObj);
break;
case "video":
$result = $this->receiveVideo($postObj);
break;
case "link":
$result = $this->receiveLink($postObj);
break;
default:
$result = "unknown msg type: ".$RX_TYPE;
break;
}
$this->logger("T ".$result);
echo $result;
}else {
echo "";
exit;
}
}
//接收事件消息
private function receiveEvent($object)
{
$content = "";
switch ($object->Event)
{
case "subscribe":
$content = "欢迎来到xxxx ";
break; //这里是用户点击关注公众号后系统回复的消息。
case "unsubscribe":
$content = "取消关注";
break;
case "SCAN":
$content = "扫描场景 ".$object->EventKey;
break;
case "CLICK":
switch ($object->EventKey)
{
case "COMPANY":
$content = "xxxx";
break;
default:
$content = "点击菜单:".$object->EventKey;
break;
}
break; //click和scan这两部分目前还不明白具体作用
case "LOCATION":
$content = "上传位置:纬度 ".$object->Latitude.";经度 ".$object->Longitude;
break;
case "VIEW":
$content = "跳转链接 ".$object->EventKey;
break;
default:
$content = "receive a new event: ".$object->Event;
break;
}
$result = $this->transmitText($object, $content);
return $result;
}
//接收文本消息
private function receiveText($object)
{
switch ($object->Content)
{
case "文本":
$content = "这是个文本消息";
break;
case "音乐":
$content = array("Title"=>"最炫民族风", "Description"=>"歌手:凤凰传奇", "MusicUrl"=>"http://121.199.4.61/music/zxmzf.mp3", "HQMusicUrl"=>"http://121.199.4.61/music/zxmzf.mp3");
break;
default:
$content = date("Y-m-d H:i:s",time())."\n你很优秀"."\n$object->Content";
break;
}//这部分也就是在识别用户发送的消息,比如用户发送“音乐”,系统自动回复最炫民族风。
if(is_array($content)){
if (isset($content[0]['PicUrl'])){
$result = $this->transmitNews($object, $content);
}else if (isset($content['MusicUrl'])){
$result = $this->transmitMusic($object, $content);
}
}else{
$result = $this->transmitText($object, $content);
}
return $result;
}
//接收图片消息
private function receiveImage($object)
{
$content = array("MediaId"=>$object->MediaId);
$result = $this->transmitImage($object, $content);
return $result;
}
//接收位置消息
private function receiveLocation($object)
{
$content = "你发送的是位置,纬度为:".$object->Location_X.";经度为:".$object->Location_Y.";缩放级别为:".$object->Scale.";位置为:".$object->Label;
$result = $this->transmitText($object, $content);
return $result;
}
//接收语音消息
private function receiveVoice($object)
{
if (isset($object->Recognition) && !empty($object->Recognition)){
$content = "你刚才说的是:".$object->Recognition;
$result = $this->transmitText($object, $content);
}else{
$content = array("MediaId"=>$object->MediaId);
$result = $this->transmitVoice($object, $content);
}
return $result;
}
//接收视频消息
private function receiveVideo($object)
{
$content = array("MediaId"=>$object->MediaId, "ThumbMediaId"=>$object->ThumbMediaId, "Title"=>"", "Description"=>"");
$result = $this->transmitVideo($object, $content);
return $result;
}
//接收链接消息
private function receiveLink($object)
{
$content = "你发送的是链接,标题为:".$object->Title.";内容为:".$object->Description.";链接地址为:".$object->Url;
$result = $this->transmitText($object, $content);
return $result;
}
//回复文本消息
private function transmitText($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); //格式化输出
return $result;
}
//回复图片消息
private function transmitImage($object, $imageArray)
{
$itemTpl = "<Image>
<MediaId><![CDATA[%s]]></MediaId>
</Image>";
$item_str = sprintf($itemTpl, $imageArray['MediaId']);
$textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[image]]></MsgType>
$item_str
</xml>";
$result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time());
return $result;
}
//回复语音消息
private function transmitVoice($object, $voiceArray)
{
$itemTpl = "<Voice>
<MediaId><![CDATA[%s]]></MediaId>
</Voice>";
$item_str = sprintf($itemTpl, $voiceArray['MediaId']);
$textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[voice]]></MsgType>
$item_str
</xml>";
$result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time());
return $result;
}
//回复视频消息
private function transmitVideo($object, $videoArray)
{
$itemTpl = "<Video>
<MediaId><![CDATA[%s]]></MediaId>
<ThumbMediaId><![CDATA[%s]]></ThumbMediaId>
<Title><![CDATA[%s]]></Title>
<Description><![CDATA[%s]]></Description>
</Video>";
$item_str = sprintf($itemTpl, $videoArray['MediaId'], $videoArray['ThumbMediaId'], $videoArray['Title'], $videoArray['Description']);
$textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[video]]></MsgType>
$item_str
</xml>";
$result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time());
return $result;
}
//回复图文消息
private function transmitNews($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 $result;
}
//回复音乐消息
private function transmitMusic($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 $result;
}
//日志记录
private function logger($log_content)
{
if(isset($_SERVER['HTTP_APPNAME'])){ //SAE
sae_set_display_errors(false);
sae_debug($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."\r\n", FILE_APPEND);
}
}
}