微信公众号 对接网页开发

<?php
define("TOKEN","wx346b222");
function checkSignature()
{
//从GET参数中读取三个字段的值
$signature = $_GET["signature"];
$timestamp = $_GET["timestamp"];
$nonce = $_GET["nonce"];
//读取预定义的TOKEN
$token = TOKEN;
//对数组进行排序
$tmpArr = array($token, $timestamp, $nonce);
sort($tmpArr, SORT_STRING);
//对三个字段进行sha1运算
$tmpStr = implode( $tmpArr );
$tmpStr = sha1( $tmpStr );
//判断我方计算的结果是否和微信端计算的结果相符
//这样利用只有微信端和我方了解的token作对比,验证访问是否来自微信官方.
if( $tmpStr == $signature ){
return true;
}else{
return false;
}
}
if(checkSignature()){
echo $_GET["echostr"];
}
else{
echo 'error';
}