微信公众号的配置

 1.首先登录微信公众号-〉开发者工具-〉公众平台测试账号，里面的TOKEN  必须与文件中自己定义的TOKEN保持一致才能配置成功

2. 验证请求是否来自微信服务器

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;
		}
	}

3. 向公众号发送消息验证是否回复

代码如下

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

        }else {
        	echo "";
        	exit;
        }
    }
    // 关键字
    public function word($keyword){
    	if($keyword === '天气'){
	    	return $contentStr ="今天天气有雨！";
        }else if($keyword === '你好'){	
	    	return $contentStr ="你好!有什么需要帮助？";   	
        }else{
	        return $contentStr ="sorry,I can not help you。";
	    
    }

4.其中起着重要作用的代码如下

define("TOKEN", "weixin");
 $echoStr = $_GET["echostr"];
echo $echoStr;