一个简单的微信公共平台接口类_自己开发一个公用号接口平台-优快云博客

本文详细介绍了微信API封装类的功能、构造、属性设置、消息获取、文本和图文消息回复等核心内容，帮助开发者轻松实现微信公众号的自动化交互。

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<?php
if(!defined('IS_INITPHP')) exit('Access Denied!');
/**
 * 微信API封装类
 * @author lxm 
 * @time 2013-06-03
 * @version
 */
class weixin
{
	public $token;
	public $msgType;
	public $msg;
	
	public function __construct(){
		$this -> token = '';
		$this -> msgType = 'text';
		$this -> msg = array();
	}
	public function __destruct(){
		unset($this -> token);
		unset($this -> msgType);
		unset($this -> msg);
	}
	/**
	 * @param 
	 */
	public function setToken($token){
		$this -> token = $token;
	}
	/**
	 * 获取用户通过微信发送过来的信息
	 */
	public function getMsg(){
		//get post data, May be due to the different environments
		$postData = $GLOBALS["HTTP_RAW_POST_DATA"];

		//extract post data
		if (!empty($postData)){

			$this -> msg = (array)simplexml_load_string($postData, 'SimpleXMLElement', LIBXML_NOCDATA);
			$this -> msgtype = strtolower($this->msg['MsgType']);
		}
	}
	/**
	 * 回复文本消息
	 */
	public function makeText($text){
		$createTime = InitPHP::getTime();
		$FuncFlag = $this->setFlag ? 1 : 0;
		$textTpl = "<xml>
					<ToUserName><![CDATA[{$this->msg['FromUserName']}]]></ToUserName>
					<FromUserName><![CDATA[{$this->msg['ToUserName']}]]></FromUserName>
					<CreateTime>{$createTime}</CreateTime>
					<MsgType><![CDATA[text]]></MsgType>
					<Content><![CDATA[%s]]></Content>
					<FuncFlag>%s</FuncFlag>
					</xml>";
		return sprintf($textTpl,$text,$FuncFlag);
	}
	/**
	 * 回复图文消息
	 */
	public function makeNewsPic($data=array()){
		$createTime = InitPHP::getTime();
		$FuncFlag = $this->setFlag ? 1 : 0;
		$newTplHeader = "<xml>
						<ToUserName><![CDATA[{$this->msg['FromUserName']}]]></ToUserName>
						<FromUserName><![CDATA[{$this->msg['ToUserName']}]]></FromUserName>
						<CreateTime>{$createTime}</CreateTime>
						<MsgType><![CDATA[news]]></MsgType>
						<ArticleCount>%s</ArticleCount>
						<Articles>";
		$newTplItem = "<item>
						<Title><![CDATA[%s]]></Title>
						<Description><![CDATA[%s]]></Description>
          			 	 <PicUrl><![CDATA[%s]]></PicUrl>
           				 <Url><![CDATA[%s]]></Url>
           				 </item>";
        $newTplFoot = "</Articles>
          				  <FuncFlag>%s</FuncFlag>
            			</xml>";
		$Content = '';
		$itemsCount = count($data['items']);
        $itemsCount = $itemsCount < 10 ? $itemsCount : 10;//微信公众平台图文回复的消息一次最多10条
		if ($itemsCount) {
			foreach ($data['items'] as $key => $item) {
					if ($key<=9) {
						$Content .= sprintf($newTplItem,$item['title'],$item['description'],$item['picurl'],$item['url']);
						}
				}
		}
			$header = sprintf($newTplHeader,$itemsCount);
			$footer = sprintf($newTplFoot,$FuncFlag);
			return $header . $Content . $footer;
	}
	
	public function valid(){
		$echoStr = $_GET["echostr"];
		//valid signature , option
		if($this->checkSignature()===true){
			return $echoStr;
		}else{
			return false;
		} 
	}
	private function checkSignature(){
		$signature = $_GET["signature"];
		$timestamp = $_GET["timestamp"];
		$nonce = $_GET["nonce"];
	
		$token = $this->token;
		$tmpArr = array($token, $timestamp, $nonce);
		sort($tmpArr);
		$tmpStr = implode( $tmpArr );
		$tmpStr = sha1( $tmpStr );
		//$d= $token.'----'.$signature.'::'.$timestamp.'::'.$nonce.'~~~~'.$tmpStr;
		//file_put_contents(CAR_PATH."test/test.txt",$d);测试
		if( $tmpStr == $signature ){
			return true;
		}else{
			return false;
		}
	}
}