diff --git a/WeChat/Contracts/Tools.php b/WeChat/Contracts/Tools.php
index 90b4a43..a31bb8e 100644
--- a/WeChat/Contracts/Tools.php
+++ b/WeChat/Contracts/Tools.php
@@ -99,7 +99,7 @@ class Tools
 
     /**
      * 创建CURL文件对象
-     * @param $filename
+     * @param mixed $filename
      * @param string $mimetype
      * @param string $postname
      * @return \CURLFile|string
@@ -168,7 +168,7 @@ class Tools
     /**
      * 解析XML文本内容
      * @param string $xml
-     * @return boolean|mixed
+     * @return array|false
      */
     public static function xml3arr($xml)
     {
@@ -354,7 +354,7 @@ class Tools
     private static function _buildHttpData($data, $build = true)
     {
         if (!is_array($data)) return $data;
-        foreach ($data as $key => $value) if (is_object($value) && $value instanceof \CURLFile) {
+        foreach ($data as $key => $value) if ($value instanceof \CURLFile) {
             $build = false;
         } elseif (is_object($value) && isset($value->datatype) && $value->datatype === 'MY_CURL_FILE') {
             $build = false;
diff --git a/WeChat/Media.php b/WeChat/Media.php
index cbfde37..3ae1390 100644
--- a/WeChat/Media.php
+++ b/WeChat/Media.php
@@ -14,8 +14,8 @@
 
 namespace WeChat;
 
-use WeChat\Contracts\Tools;
 use WeChat\Contracts\BasicWeChat;
+use WeChat\Contracts\Tools;
 use WeChat\Exceptions\InvalidResponseException;
 
 /**
@@ -99,7 +99,7 @@ class Media extends BasicWeChat
 
     /**
      * 上传图文消息内的图片获取URL
-     * @param string $filename
+     * @param mixed $filename
      * @return array
      * @throws Exceptions\LocalCacheException
      * @throws InvalidResponseException
@@ -113,7 +113,7 @@ class Media extends BasicWeChat
 
     /**
      * 新增其他类型永久素材
-     * @param string $filename 文件名称
+     * @param mixed $filename 文件名称
      * @param string $type 媒体文件类型(image|voice|video|thumb)
      * @param array $description 包含素材的描述信息
      * @return array