异步回调

@@ -35,7 +35,7 @@ class Wechat extends Controller
      * 微信支付配置
      */
     public static function payment(){
-        $http = $this->isHttps() ? 'https://' : 'http://';
+        $http = self::isHttps() ? 'https://' : 'http://';
         $config = [
             'app_id'             => config('site.app_id'),
             'mch_id'             => config('site.mch_id'),
@@ -74,7 +74,7 @@ class Wechat extends Controller
     /**
      * 判断是否是https
      */
-    public function isHttps() {
+    public static function isHttps() {
         if ( !empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off') {
             return true;
         } elseif ( isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https' ) {