php微信接口验证写法

<?php

    //获得接口认证

    $timestamp = $_GET['timestamp'];

    $nonce = $_GET['nonce'];

    $token = 'weixin';

    $signature = $_GET['signature'];

    //将参数字典化排序

    $tmpArr = array($timestamp,$nonce,$token);

    sort($tmpArr);

    $judgeArr = implode('',$tmpArr);

    $judge = sha1($judgeArr);

    //判断是否符合

    if($judge == $signature)

    {

        echo $_GET['echostr'];

        exit;

    }