微信开发学习笔记（第一步：）基本配置

首先感谢陈锋陈老板为我申请好了微信开发帐号，感激啊！

打开https://mp.weixin.qq.com，登录帐号，选择左侧菜单项的：开发－〉基本配置。

首先测试下安装的HTTP服务器（apache+php+mysql）和微信服务器接口。

ＵＲＬ填写脚本对应的ＵＲＬ如：http://xx.xx.xx.xx/weixinTest/wechat.php (xx部分为可访问的公网ip）

Token(令牌)和wechat.php文件里的define("TOKEN", "weixin")保持一致;

用官网给的示例稍加修改就可以

wechat.php的内容如下：

<?php
/**
* wechat php test
*/
define("TOKEN", "weixin");
$wechatObj = new wechatCallbackapiTest();
//echo $_GET["echostr"];　　//如果担心算法有问题，可直接返回，暴力吧！
$wechatObj->valid(); //验证Token时调用。
//$wechatObj->responseMsg();　　　　//处理在手机微信打开公众平台时输入字符串的应答

class wechatCallbackapiTest
{
public function valid()
{

//验证时只需要通过echo返回计算的结果
$echoStr = $_GET["echostr"];
//valid signature , option
if($this->checkSignature()){
echo $echoStr;
exit;
}
}

public function responseMsg()

//响应消息时需要返加ＸＭＬ格式的消息
{
//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);
$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 = "欢迎光临!";
$resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
echo $resultStr;
}else{
echo "Input something...";
}

}else {
echo "";
exit;
}
}

private function checkSignature()
{
// you must define TOKEN by yourself
if (!defined("TOKEN")) {
throw new Exception('TOKEN is not defined!');
}

$signature = $_GET["signature"];
$timestamp = $_GET["timestamp"];
$nonce = $_GET["nonce"];

$token = TOKEN;
$tmpArr = array($token, $timestamp, $nonce);
// use SORT_STRING rule
sort($tmpArr, SORT_STRING);
$tmpStr = implode( $tmpArr );
$tmpStr = sha1( $tmpStr );

if( $tmpStr == $signature ){
return true;
}else{
return false;
}
}
}

?>