微信小程序Taoken验证失败
重点：将验证PHP放到URL的根目录下，放在别的目录下将会验证失败
PHP代码：
<?php
//1. 将timestamp , nonce , token 按照字典排序
$timestamp = $_GET['timestamp'];
$nonce = $_GET['nonce'];
$token = "";//自己后台写的token
$signature = $_GET['signature'];
$array = array($timestamp,$nonce,$token);
sort($array);
//2.将排序后的三个参数拼接后用sha1加密
$tmpstr = implode('',$array);
$tmpstr = sha1($tmpstr);
//3. 将加密后的字符串与 signature 进行对比, 判断该请求是否来自微信
if($tmpstr == $signature)
{
echo $_GET['echostr'];
exit;
}