微信開發1 （接入微信）

define("TOKEN", "weixin");
$wechatObj = new wechatCallbackapiTest();
$wechatObj->run();


class wechatCallbackapiTest
{
	public function run()
    {
    	if($this->checkSignature()==false){
    		die('非法請求');
    	}

    	if(isset($_GET["echostr"])){
    		$echoStr = $_GET["echostr"];
    		echo $echoStr;
        	exit;
    	}
    	else{
    		$this->responseMsg();
    	}
        // $echoStr = $_GET["echostr"];

        // //valid signature , option
        // if($this->checkSignature()){
        // 	echo $echoStr;
        // 	exit;
        // }else{
        // 	$this->responseMsg();
        // }
    }

    public function responseMsg()
    {
		//get post data, May be due to the different environments
		$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];

      	//extract post data
		if (!empty($postStr)){
                
              	$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
                $fromUsername = $postObj->FromUserName;
                $toUsername = $postObj->ToUserName;
                $keyword = trim($postObj->Content);
                $time = time();
                $textTpl = "<xml>
							<ToUserName><![CDATA[%s]]></ToUserName>
							<FromUserName><![CDATA[%s]]></FromUserName>
							<CreateTime>%s</CreateTime>
							<MsgType><![CDATA[%s]]></MsgType>
							<Content><![CDATA[%s]]></Content>
							<FuncFlag>0</FuncFlag>
							</xml>";             
				if(!empty( $keyword ))
                {
              		$msgType = "text";
                	$contentStr = "Welcome to wechat world!";
                	$resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                	echo $resultStr;
                }else{
                	echo "Input something...";
                }

        }else {
        	echo "";
        	exit;
        }
    }
		
	private function checkSignature()
	{
		if(!isset($_GET["signature"]) || !isset($_GET["timestamp"]) || !isset($_GET["nonce"]))
		{
			return false;
		}
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];	
        		
		$token = TOKEN;
		$tmpArr = array($token, $timestamp, $nonce);
		sort($tmpArr);
		$tmpStr = implode( $tmpArr );
		$tmpStr = sha1( $tmpStr );
		
		if( $tmpStr == $signature ){
			return true;
		}else{
			return false;
		}
	}
}

第一步：填寫伺服器配置

第二步：驗證訊息的確來自微信伺服器

第三步：依據介面文件實現業務邏輯