微信二次开发——连接接口与自动回复

首先，写一个大的方法wechatCallbackapiTest（），与微信连接并把发送者的内容写入一个文件中，写一个方法valid()，

在自动回复消息，写一个方法responseMsg(),里边回复中的内容是xml类型的。

class wechatCallbackapiTest
{
	public function valid()
    {
    		$echoStr = $_GET["echostr"];

            if($this->checkSignature()){
                echo $echoStr;
            exit;
            }
    		
    }

public function responseMsg()
    {
		//get post data, May be due to the different environments
		// $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
		$postStr = file_get_contents("php://input");
		file_put_contents("msg.txt", $postStr,FILE_APPEND);

      	//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!";
                    $contentStr = $this->reply($keyword);
                    $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                    echo $resultStr;
                	
                }else{
                	echo "Input something...";
                }

        }else {
        	echo "";
        	exit;

public function reply($keyword){
        if($keyword==="天气"){
            $contentStr = "天朗气清，惠风和畅";
            return $contentStr;
            
        }elseif($keyword==="你好"){
            $contentStr="niece";
            return $contentStr;
        }else{
            $contentStr="What?";
           return $contentStr;
        }

    }

} }

private function checkSignature()
	{
        $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;
		}
	}
}