基于ThinkPHP5框架做的微信公众号开发（001）

namespace app\index\controller;
/**
  * wechat php test
  */


//define your token
define("TOKEN", "sudons");



class Wechat
{
    public function index(){
        if (isset($_GET['echostr'])) {
            $this->valid();
        }else{
            $this->responseMsg();
        }
    }


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


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


    private function checkSignature()
    {
        // you must define TOKEN by yourself
        if (!defined("TOKEN")) {
            throw new Exception('TOKEN is not defined!');
        }
        //获取微信提交的参数
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];    
        $token = TOKEN;
        //微信提交参数放入数组
        $tmpArr = array($token, $timestamp, $nonce);
        // use SORT_STRING rule字典序排序
        sort($tmpArr, SORT_STRING);
        //拼接字符串
        $tmpStr = implode( $tmpArr );
        //加密
        $tmpStr = sha1( $tmpStr );
        //检验signature
        if( $tmpStr == $signature){
            return true;
        }else{
            return false;
        }
    }


    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)){
            /* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,
               the best way is to check the validity of xml by yourself */
            libxml_disable_entity_loader(true);
          $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
            $RX_TYPE = trim($postObj->MsgType);


            switch ($RX_TYPE)
            {
                case "text":
                    $resultStr = $this->receiveText($postObj);
                    break;
                case "image":
                    $resultStr = $this->receiveImage($postObj);
                    break;
                case "location":
                    $resultStr = $this->receiveLocation($postObj);
                    break;
                case "voice":
                    $resultStr = $this->receiveVoice($postObj);
                    break;
                case "video":
                    $resultStr = $this->receiveVideo($postObj);
                    break;
                case "link":
                    $resultStr = $this->receiveLink($postObj);
                    break;
                case "event":
                    $resultStr = $this->receiveEvent($postObj);
                    break;
                default:
                    $resultStr = "unknow msg type: ".$RX_TYPE;
                    break;
            }
            echo $resultStr;


        }else {
        echo "";
        exit;
        }
    }

    //统一用文本回复
    private function transmitText($object, $content, $flag = 0)
    {
        $textTpl = "
                    
                    
                    %s
                    
                    
                    %d
                    ";
        $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content, $flag);
        return $resultStr;
    }


    //1.事件消息
    private function receiveEvent($object)
    {
        $contentStr = "";
        switch ($object->Event)
        {
            case "subscribe":
                $contentStr = "欢迎关注塞雅创想";
                break;
            case "unsubscribe":
                $contentStr = "";
                break;
            case "CLICK":
                switch ($object->EventKey)
                {
                    default:
                        $contentStr = "你点击了菜单: ".$object->EventKey;
                        break;
                }
                break;
            default:
                $contentStr = "receive a new event: ".$object->Event;
                break;
        }
        $resultStr = $this->transmitText($object, $contentStr);
        return $resultStr;
    }


    //2.文本消息
    private function receiveText($object)
    {
        $funcFlag = 0;
        $contentStr = "你发送的是文本，内容为：".$object->Content;
        $resultStr = $this->transmitText($object, $contentStr, $funcFlag);
        return $resultStr;
    }


    //3.图片消息
    private function receiveImage($object)
    {
        $funcFlag = 0;
        $contentStr = "你发送的是图片，地址为：".$object->PicUrl;
        $resultStr = $this->transmitText($object, $contentStr, $funcFlag);
        return $resultStr;
    }


    //4.语音消息
    private function receiveVoice($object)
    {
        $funcFlag = 0;
        $contentStr = "你发送的是语音，媒体ID为：".$object->MediaId;
        $resultStr = $this->transmitText($object, $contentStr, $funcFlag);
        return $resultStr;
    }


    //5.视频消息
    private function receiveVideo($object)
    {
        $funcFlag = 0;
        $contentStr = "你发送的是视频，媒体ID为：".$object->MediaId;
        $resultStr = $this->transmitText($object, $contentStr, $funcFlag);
        return $resultStr;
    }


    //6.位置消息
    private function receiveLocation($object)
    {
        $funcFlag = 0;
        $contentStr = "你发送的是位置，纬度为：".$object->Location_X."；经度为：".$object->Location_Y."；缩放级别为：".$object->Scale."；位置为：".$object->Label;
        $resultStr = $this->transmitText($object, $contentStr, $funcFlag);
        return $resultStr;
    }


    //7.链接消息
    private function receiveLink($object)
    {
        $funcFlag = 0;
        $contentStr = "你发送的是链接，标题为：".$object->Title."；内容为：".$object->Description."；链接地址为：".$object->Url;
        $resultStr = $this->transmitText($object, $contentStr, $funcFlag);
        return $resultStr;
    }


}

?>