update

@@ -36,7 +36,8 @@ class InquiryForm extends Base
             'phone' => '电话',
             'mobile' => '电话',
             'message' => '询盘内容',
-            'company' => '公司名称'
+            'company' => '公司名称',
+            'file' => '文件'
         ];
         if($field){
             return $map[$field] ?? $field;
@@ -70,6 +71,10 @@ class InquiryForm extends Base
         unset($data['globalso-domain']);
         unset($data['globalso-edition']);
         unset($data['globalso-date']);
+
+        //数组key转为小写
+        $data = array_change_key_case($data, CASE_LOWER);
+
         ksort($data);
         $field = array_keys($data);
         $sign = md5(json_encode($field));