1 <?php 2 namespace app\index\controller; 3   4 use think\Controller; 5    6   7  8 Class Index extends Controller 9 {10     public function index()//接收微信客户端发送的信息并回应！ 11     { 12     13      //获得参数 signature nonce token timestamp echostr14         $nonce     = $_GET[‘nonce‘];15         $token     = ‘wexin‘;16         $timestamp = $_GET[‘timestamp‘];17         $echostr   = $_GET[‘echostr‘];18         $signature = $_GET[‘signature‘];19         //形成数组，然后按字典序排序20         $array = array();21         $array = array($nonce, $timestamp, $token);22         sort($array);23         //拼接成字符串,sha1加密 ，然后与signature进行校验24         $str = sha1( implode( $array ) );25         if( $str  == $signature && $echostr ){26             //第一次接入weixin api接口的时候27             echo  $echostr;28             exit;29         }30     }31      32     33  34 }