WeChat public platform development (3) Subscription event (subscribe) processing_PHP tutorial

When a new user follows the WeChat public platform, a subscription event will be generated, namely subscribe event. There is no corresponding reply to this event in the default code.

After new users pay attention to the public platform, they may want to know what functions the platform provides and how to use the platform. In layman's terms, it is the "instruction manual" of the platform.

This article will describe in detail the processing of the subscribe event and reply to the corresponding information to improve interactivity.

WeChat currently provides five message types, namely:

• Text message (text);
• Image message (image);
• Geolocation message (location);
• Link message (link);
• Event push (event);

After receiving a message, you first need to make a judgment on the message type, and then process different types of messages. In event push, event types are divided into three types, subscribe (subscription), unsubscribe (cancel subscription), CLICK (custom menu click event), and one more judgment is required; after it is judged to be a subscribe event, according to Set the welcome message and reply to the user.

<span $postObj</span> = <span simplexml_load_string</span>(<span $postStr</span>, 'SimpleXMLElement',<span  LIBXML_NOCDATA);
</span><span $RX_TYPE</span> = <span trim</span>(<span $postObj</span>-><span MsgType);

</span><span switch</span>(<span $RX_TYPE</span><span )
{
    </span><span case</span> "text":
        <span $resultStr</span> = <span $this</span>->handleText(<span $postObj</span><span );
        </span><span break</span><span ;
    </span><span case</span> "event":
        <span $resultStr</span> = <span $this</span>->handleEvent(<span $postObj</span><span );
        </span><span break</span><span ;
    </span><span default</span>:
        <span $resultStr</span> = "Unknow msg type: ".<span $RX_TYPE</span><span ;
        </span><span break</span><span ;
}</span>

Instructions:

$RX_TYPE = trim($postObj->MsgType); Get the message type;

case "text":
$resultStr = $this->handleText($postObj); Use the handleText() function to process text messages;

case "event":
$resultStr = $this->handleEvent($postObj); Use the handleEvent() function to handle event push;

<span switch</span> (<span $object</span>-><span Event)
{
    </span><span case</span> "subscribe":
        <span $contentStr</span> = "感谢您关注【卓锦苏州】"."\n"."微信号：zhuojinsz"."\n"."卓越锦绣，名城苏州，我们为您提供苏州本地生活指南，苏州相关信息查询，做最好的苏州微信平台。"."\n"."目前平台功能如下："."\n"."【1】 查天气，如输入：苏州天气"."\n"."【2】 查公交，如输入：苏州公交178"."\n"."【3】 翻译，如输入：翻译I love you"."\n"."【4】 苏州信息查询，如输入：苏州观前街"."\n"."更多内容，敬请期待..."<span ;
        </span><span break</span><span ;
    </span><span default</span> :
        <span $contentStr</span> = "Unknow Event: ".<span $object</span>-><span Event;
        </span><span break</span><span ;
}</span>

Instructions:

If it is a subscribe event, set the reply content as "Thank you for paying attention to [Zhuojin Suzhou]...";

<?<span php
</span><span /*</span><span *
  * wechat php test
  </span><span */</span>

<span //</span><span define your token</span>
<span define</span>("TOKEN", "zhuojin"<span );
</span><span $wechatObj</span> = <span new</span><span  wechatCallbackapiTest();
</span><span $wechatObj</span>-><span responseMsg();
</span><span //</span><span $wechatObj->valid();</span>

<span class</span><span  wechatCallbackapiTest
{
    </span><span /*</span><span public function valid()
    {
        $echoStr = $_GET["echostr"];

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

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

        </span><span //</span><span extract post data</span>
        <span if</span> (!<span empty</span>(<span $postStr</span><span )){
                
                </span><span $postObj</span> = <span simplexml_load_string</span>(<span $postStr</span>, 'SimpleXMLElement',<span  LIBXML_NOCDATA);
                </span><span $RX_TYPE</span> = <span trim</span>(<span $postObj</span>-><span MsgType);

                </span><span switch</span>(<span $RX_TYPE</span><span )
                {
                    </span><span case</span> "text":
                        <span $resultStr</span> = <span $this</span>->handleText(<span $postObj</span><span );
                        </span><span break</span><span ;
                    </span><span case</span> "event":
                        <span $resultStr</span> = <span $this</span>->handleEvent(<span $postObj</span><span );
                        </span><span break</span><span ;
                    </span><span default</span>:
                        <span $resultStr</span> = "Unknow msg type: ".<span $RX_TYPE</span><span ;
                        </span><span break</span><span ;
                }
                </span><span echo</span> <span $resultStr</span><span ;
        }</span><span else</span><span  {
            </span><span echo</span> ""<span ;
            </span><span exit</span><span ;
        }
    }

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

    </span><span public</span> <span function</span> handleEvent(<span $object</span><span )
    {
        </span><span $contentStr</span> = ""<span ;
        </span><span switch</span> (<span $object</span>-><span Event)
        {
            </span><span case</span> "subscribe":
                <span $contentStr</span> = "感谢您关注【卓锦苏州】"."\n"."微信号：zhuojinsz"."\n"."卓越锦绣，名城苏州，我们为您提供苏州本地生活指南，苏州相关信息查询，做最好的苏州微信平台。"."\n"."目前平台功能如下："."\n"."【1】 查天气，如输入：苏州天气"."\n"."【2】 查公交，如输入：苏州公交178"."\n"."【3】 翻译，如输入：翻译I love you"."\n"."【4】 苏州信息查询，如输入：苏州观前街"."\n"."更多内容，敬请期待..."<span ;
                </span><span break</span><span ;
            </span><span default</span> :
                <span $contentStr</span> = "Unknow Event: ".<span $object</span>-><span Event;
                </span><span break</span><span ;
        }
        </span><span $resultStr</span> = <span $this</span>->responseText(<span $object</span>, <span $contentStr</span><span );
        </span><span return</span> <span $resultStr</span><span ;
    }
    
    </span><span public</span> <span function</span> responseText(<span $object</span>, <span $content</span>, <span $flag</span>=0<span )
    {
        </span><span $textTpl</span> = "<span <xml>
                    <ToUserName><![CDATA[%s]]></ToUserName>
                    <FromUserName><![CDATA[%s]]></FromUserName>
                    <CreateTime>%s</CreateTime>
                    <MsgType><![CDATA[text]]></MsgType>
                    <Content><![CDATA[%s]]></Content>
                    <FuncFlag>%d</FuncFlag>
                    </xml></span>"<span ;
        </span><span $resultStr</span> = <span sprintf</span>(<span $textTpl</span>, <span $object</span>->FromUserName, <span $object</span>->ToUserName, <span time</span>(), <span $content</span>, <span $flag</span><span );
        </span><span return</span> <span $resultStr</span><span ;
    }

    </span><span private</span> <span function</span><span  checkSignature()
    {
        </span><span $signature</span> = <span $_GET</span>["signature"<span ];
        </span><span $timestamp</span> = <span $_GET</span>["timestamp"<span ];
        </span><span $nonce</span> = <span $_GET</span>["nonce"<span ];    
                
        </span><span $token</span> =<span  TOKEN;
        </span><span $tmpArr</span> = <span array</span>(<span $token</span>, <span $timestamp</span>, <span $nonce</span><span );
        </span><span sort</span>(<span $tmpArr</span><span );
        </span><span $tmpStr</span> = <span implode</span>( <span $tmpArr</span><span  );
        </span><span $tmpStr</span> = <span sha1</span>( <span $tmpStr</span><span  );
        
        </span><span if</span>( <span $tmpStr</span> == <span $signature</span><span  ){
            </span><span return</span> <span true</span><span ;
        }</span><span else</span><span {
            </span><span return</span> <span false</span><span ;
        }
    }
}

</span>?>

Please follow Zhuojin Suzhou WeChat public account, Zhuojin Suzhou is developed based on SAE platform and is targeted at mainstream WeChat functions Conduct development testing.

You can follow the Zhuojin Suzhou public account to conduct functional testing and obtain new application development.

1. Log in to the WeChat client, friends -> Add friends -> Search number -> zhuojinsz, find and follow.

2. Scan the QR code:

Zhuojin Suzhou Function list.

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http://www.bkjia.com/PHPjc/440365.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/440365.htmlTechArticleNew users following the WeChat public platform will generate a subscription event, that is, the subscribe event. There is no support for this in the default code. Respond to the event accordingly. Follow the public platform for new users...