


[PHP WeChat public platform development series]
01. Configure WeChat interface
02. Public platform sample code analysis
03. Subscription event (subscribe) processing
URL of this article: http://www.phpchina.com/archives/view-43367-1.html
This series is contributed by PHPChina's specially invited author @David_Tang. Please indicate the author's information and the address of this article when reprinting.
1. Introduction
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.
2. Idea analysis
WeChat currently provides five message types, namely:
- Text message (text);
- Picture 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), and CLICK (custom menu click event). One more judgment is required; after it is judged to be a subscribe event, the event will be determined according to the settings. Welcome message, reply to the user.
3. Determine the message type

$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA); $RX_TYPE = trim($postObj->MsgType); switch($RX_TYPE) { case "text": $resultStr = $this->handleText($postObj); break; case "event": $resultStr = $this->handleEvent($postObj); break; default: $resultStr = "Unknow msg type: ".$RX_TYPE; break; }

Description:
$RX_TYPE = trim($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;
4. Determine the event type

switch ($object->Event) { case "subscribe": $contentStr = "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..."; break; default : $contentStr = "Unknow Event: ".$object->Event; break; }

Description:
If it is a subscribe event, set the reply content as "Thank you for paying attention to [Zhuojin Suzhou]...";
>5. Complete code

<?php /** * wechat php test */ //define your token define("TOKEN", "zhuojin"); $wechatObj = new wechatCallbackapiTest(); $wechatObj->responseMsg(); //$wechatObj->valid(); class wechatCallbackapiTest { /*public function valid() { $echoStr = $_GET["echostr"]; //valid signature , option if($this->checkSignature()){ echo $echoStr; exit; } }*/ public function responseMsg() { //get post data, May be due to the different environments $postStr = $GLOBALS["HTTP_RAW_POST_DATA"]; //extract post data if (!empty($postStr)){ $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA); $RX_TYPE = trim($postObj->MsgType); switch($RX_TYPE) { case "text": $resultStr = $this->handleText($postObj); break; case "event": $resultStr = $this->handleEvent($postObj); break; default: $resultStr = "Unknow msg type: ".$RX_TYPE; break; } echo $resultStr; }else { echo ""; exit; } } public function handleText($postObj) { $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 $resultStr; }else{ echo "Input something..."; } } public function handleEvent($object) { $contentStr = ""; switch ($object->Event) { case "subscribe": $contentStr = "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..."; break; default : $contentStr = "Unknow Event: ".$object->Event; break; } $resultStr = $this->responseText($object, $contentStr); return $resultStr; } public function responseText($object, $content, $flag=0) { $textTpl = "<xml> <ToUserName><![CDATA[%s]]></ToUserName> <FromUserName><![CDATA[%s]]></FromUserName> <CreateTime>%s</CreateTime> <MsgType><![CDATA[text]]></MsgType> <Content><![CDATA[%s]]></Content> <FuncFlag>%d</FuncFlag> </xml>"; $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content, $flag); return $resultStr; } 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; } } } ?>


php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。


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