diff --git a/mobile/blank.php b/mobile/blank.php
index c535f3e..3832cce 100644
--- a/mobile/blank.php
+++ b/mobile/blank.php
@@ -19,6 +19,12 @@ if (!isset($_GET['code'])) {
 
 // 获取 access_token 和 openid
 $code = $_GET['code'];
+if ($code != null){
+    var_dump($code);
+} else {
+    var_dump("code is null");
+}
+
 $url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid=' . $app_id . '&secret=' . $app_secret . '&code=' . $code . '&grant_type=authorization_code';
 $response = file_get_contents($url);
 $data = json_decode($response, true);