微信公众平台开发（3）封装所有基础接口源代码

<?
php
define ( "TOKEN", "tony" );

if (! isset ( $_GET ["echostr"] )) {
	// 调用响应消息函数
	responseMsg ();
} else {
	// 实现网址接入，调用验证消息函数
	valid ();
}
/*
 * 验证消息函数
 */
function valid() {
	if (checkSignature ()) {
		$echoStr = $_GET ["echostr"];
		echo $echoStr;
		exit ();
	} else {
		echo "error";
		exit ();
	}
}

/*
 * 检查签名函数
 */
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;
	}
}

/*
 * 响应消息函数
 */
function responseMsg() {
	
	// 依据用户传过来的消息类型进行不同的响应
	
	// 接受微信serverPOST过来的XML数据包
	$postData = $GLOBALS ["HTTP_RAW_POST_DATA"];
	
	if (empty ( $postData )) {
		echo "error";
		exit ();
	}
	
	// 解析XML数据包
	libxml_disable_entity_loader ( true ); // 禁用载入外部实体的能力
	$object = simplexml_load_string ( $postData, 'SimpleXMLElement', LIBXML_NOCDATA ); // 解释XML字符串为一个对象
	                                                                                   
	// 获取消息类型
	$MsgType = $object->MsgType;
	
	switch ($MsgType) {
		case 'event' :
			receiveEvent ( $object );
			break;
		// 接收文本消息
		case 'text' :
			echo receiveText ( $object );
			break;
		// 接收图片消息
		case 'image' :
			echo receiveImage ( $object );
			break;
		// 接收地理位置消息
		case 'location' :
			echo receiveLocation ( $object );
			break;
		// 接收语音消息
		case 'voice' :
			echo receiveVoice ( $object );
			break;
		// 接收视频消息
		case 'video' :
			echo receiveVideo ( $object );
			break;
		// 接收链接消息
		case 'link' :
			echo receiveLink ( $object );
			break;
		default :
			echo receiveText ( "无法识别该消息类型" );
			break;
	}
}

/*
 * 接收文本消息函数
 */
function receiveText($obj) {
	// 获取文本内容
	$Content = "您刚刚发送的消息为：" . $obj->Content;
	
	// 发送文本消息
	return replyText ( $obj, $Content );
}

/*
 * 接受图片消息函数
 */
function receiveImage($obj) {
	// 获取图片消息的内容
	$imageArr = array (
			"PicUrl" => $obj->PicUrl,
			"MediaId" => $obj->MediaId 
	);
	// 发送图片消息
	return replyImage ( $obj, $imageArr );
}

/*
 * 接受地理位置消息函数
 */
function receiveLocation($obj) {
	// 获取地理位置消息的内容
	$locationArr = array (
			'Location_X' => '地理位置经度：' . $obj->Location_X,
			'Location_Y' => '地理位置经度：' . $obj->Location_Y,
			'Label' => $obj->Label 
	);
	// 回复文本消息
	return replyText ( $obj, $locationArr ['Location_Y'] );
}

/*
 * 接收语音消息
 */
function receiveVoice($obj) {
	// 获取语音消息
	$voiceArr = array (
			"MediaId" => $obj->MediaId,
			"Format" => $obj->Format,
			"MsgID" => $obj->MsgID 
	);
	// 回复语音消息
	return replyVoice ( $obj, $voiceArr ["MediaId"] );
}

/*
 * 接收事件消息
 */
function receiveEvent($obj) {
	$Event = $obj->Event;
	switch ($Event) {
		// 关注事件
		case 'subscribe' :
			
			// 假设$object->EventKey不为空则为：
			// 扫描带參数二维码事件,用户未关注时，进行关注后的事件推送
			if (! empty ( $obj->EventKey )) {
				echo replyText ( $obj, "欢迎扫描关注Tony的微信公众平台" );
			} else {
				echo replyText ( $obj, "欢迎关注Tony的微信公众平台" );
			}
			break;
		// 取消关注事件
		case 'unsubscribe' :
			
			// code...
			break;
		
		// 扫描带參数二维码事件,用户已关注时的事件推送
		case 'SCAN' :
			
			// code...
			break;
		
		// 自己定义菜单事件
		case 'CLICK' :
			$EventKey = $obj->EventKey; // 事件KEY值，与自己定义菜单接口中KEY值相应
			switch ($EventKey) {
				case 'tuwen' :
					$newsArr = array (
							array (
									"Title" => "这是图文信息的标题1",
									"Description" => "描写叙述1",
									"PicUrl" => "http://mmbiz.qpic.cn/mmbiz/C9jRZGqdOsM5v8w58K9DTwVn6RpwnLCsHLjnNXUib8nD66rGQaL1iaFI9q1qfXLfk1IJO2GicCibPFhWyTlcIADNpA/0",
									"Url" => "http://mp.weixin.qq.com/s?__biz=MzA5NzY1NjgwOQ==&mid=200193946&idx=1&sn=4aff70dbb45d7f8e9f3904702bfad3d2#rd" 
							),
							array (
									"Title" => "这是图文信息的标题2",
									"Description" => "描写叙述2",
									"PicUrl" => "http://mmbiz.qpic.cn/mmbiz/C9jRZGqdOsM37wGEwxKxmC4v10vhJsHTCSjyLmEGBcmVqsLhK5f9Yp7syaL2XnGYdISF8KDLvJcDBuG7Ip3nbg/0",
									"Url" => "http://mp.weixin.qq.com/s?__biz=MzA5NzY1NjgwOQ==&mid=200191222&idx=1&sn=615458ea5dbaa91b2f4a16ef73ad639b#rd" 
							) 
					);
					echo replyNews ( $obj, $newsArr );
					break;
				case 'V1001_GOOD' :
					echo replyText ( $obj, "感谢您的赞扬" );
					break;
				default :
					echo replyText ( $obj, "你点击的是其它的事件" );
					break;
			}
			break;
	}
}

/*
 * 接收视频消息
 */
function receiveVideo($obj) {
	$videoArr = array (
			"MediaId" => $obj->MediaId,
			"ThumbMediaId" => $obj->ThumbMediaId 
	);
	
	// 回复视频消息
	replyVideo ( $obj, $videoArr ["MediaId"] );
}

/*
 * 接收链接消息
 */
function receiveLink($obj) {
	$linkArr = array (
			"Title" => $obj->Title,
			"Description" => $obj->Description,
			"Url" => $obj->Url,
			"MsgId" => $obj->MsgId 
	);
	// 回复文本消息
	return replyText ( $obj, $linkArr ['Url'] );
}

/*
 * 发送文本消息函数
 */
function replyText($obj, $Content) {
	$replyXML = "<xml>
					<ToUserName><![CDATA[%s]]></ToUserName>
					<FromUserName><![CDATA[%s]]></FromUserName>
					<CreateTime>%s</CreateTime>
					<MsgType><![CDATA[text]]></MsgType>
					<Content><![CDATA[%s]]></Content>
				</xml>";
	
	$FromUserName = $obj->FromUserName;
	$ToUserName = $obj->ToUserName;
	$time = time ();
	
	// 返回XML数据包
	$resultStr = sprintf ( $replyXML, $FromUserName, $ToUserName, $time, $Content );
	return $resultStr;
}

/*
 * 发送图片消息函数
 */
function replyImage($obj, $imageArr) {
	$replyXML = "<xml>
					<ToUserName><![CDATA[%s]]></ToUserName>
					<FromUserName><![CDATA[%s]]></FromUserName>
					<CreateTime>%s</CreateTime>
					<MsgType><![CDATA[image]]></MsgType>
					<Image>
						<MediaId><![CDATA[%s]]></MediaId>
					</Image>
				</xml>";
	
	$FromUserName = $obj->FromUserName;
	$ToUserName = $obj->ToUserName;
	$time = time ();
	
	// 返回XML数据包
	$resultStr = sprintf ( $replyXML, $FromUserName, $ToUserName, $time, $imageArr ["MediaId"] );
	return $resultStr;
}

/*
 * 回复语音消息
 */
function replyVoice($obj, $voiceArr) {
	$replyXML = "<xml>
					<ToUserName><![CDATA[%s]]></ToUserName>
					<FromUserName><![CDATA[%s]]></FromUserName>
					<CreateTime>%s</CreateTime>
					<MsgType><![CDATA[voice]]></MsgType>
					<Voice>
						<MediaId><![CDATA[%s]]></MediaId>
					</Voice>
				</xml>";
	$FromUserName = $obj->FromUserName;
	$ToUserName = $obj->ToUserName;
	$time = time ();
	
	// 返回XML数据包
	$resultStr = sprintf ( $replyXML, $FromUserName, $ToUserName, $time, $voiceArr );
	return $resultStr;
}
/*
 * 回复视频消息
 */
function replyVideo($obj, $videoArr) {
	$replyXML = "<xml>
					<ToUserName><![CDATA[%s]]></ToUserName>
					<FromUserName><![CDATA[%s]]></FromUserName>
					<CreateTime>%s</CreateTime>
					<MsgType><![CDATA[video]]></MsgType>
					<Video>
						<MediaId><![CDATA[%s]]></MediaId>
					</Video> 
				</xml>";
	$FromUserName = $obj->FromUserName;
	$ToUserName = $obj->ToUserName;
	$time = time ();
	
	// 返回XML数据包
	$resultStr = sprintf ( $replyXML, $FromUserName, $ToUserName, $time, $videoArr );
	return $resultStr;
}

/*
 * 回复音乐消息
 */
function replyMusic($obj, $musicArr) {
	$replyXML = "<xml>
					<ToUserName><![CDATA[%s]]></ToUserName>
					<FromUserName><![CDATA[%s]]></FromUserName>
					<CreateTime>%s</CreateTime>
					<MsgType><![CDATA[music]]></MsgType>
					<Music>
						<Title><![CDATA[%s]]></Title>
						<Description><![CDATA[%s]]></Description>
						<MusicUrl><![CDATA[%s]]></MusicUrl>
						<HQMusicUrl><![CDATA[%s]]></HQMusicUrl>
						<ThumbMediaId><![CDATA[%s]]></ThumbMediaId>
					</Music>
				</xml>";
	$FromUserName = $obj->FromUserName;
	$ToUserName = $obj->ToUserName;
	$time = time ();
	
	// 返回XML数据包
	$resultStr = sprintf ( $replyXML, $FromUserName, $ToUserName, $time, $musicArr ['Title'], $musicArr ['Description'], $musicArr ['MusicUrl'], $musicArr ['HQMusicUrl'], $musicArr ['ThumbMediaId'] );
	return $resultStr;
}

/*
 * 回复图文消息
 */
function replyNews($obj, $newsArr) {
	$itemStr = "";
	if (is_array ( $newsArr )) {
		foreach ( $newsArr as $item ) {
			$itemXML = "<item>
						<Title><![CDATA[%s]]></Title>
						<Description><![CDATA[%s]]></Description>
						<PicUrl><![CDATA[%s]]></PicUrl>
						<Url><![CDATA[%s]]></Url>
					</item>";
			$itemStr .= sprintf ( $itemXML, $item ["Title"], $item ["Description"], $item ["PicUrl"], $item ["Url"] );
		}
	}
	
	$replyXML = "<xml>
					<ToUserName><![CDATA[%s]]></ToUserName>
					<FromUserName><![CDATA[%s]]></FromUserName>
					<CreateTime>%s</CreateTime>
					<MsgType><![CDATA[news]]></MsgType>
					<ArticleCount>%s</ArticleCount>
					<Articles>
						{$itemStr}
					</Articles>
				</xml> ";
	
	$FromUserName = $obj->FromUserName;
	$ToUserName = $obj->ToUserName;
	$time = time ();
	
	// 返回XML数据包
	$resultStr = sprintf ( $replyXML, $FromUserName, $ToUserName, $time, count ( $newsArr ) );
	return $resultStr;
}

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