edit

passport/src/Login.php

@@ -19,9 +19,9 @@ class Login extends Base
         $url = Dever::config('base')->wechat;
         $code = Dever::input('code');
 
-        $url .= '?appid=' + $appid;
-        $url .= '&secret=' + $secret;
-        $url .= '&js_code=' + $code;
+        $url .= '?appid=' . $appid;
+        $url .= '&secret=' . $secret;
+        $url .= '&js_code=' . $code;
         $url .= '&grant_type=authorization_code';
 
         $data = Dever::curl($url);