diff --git a/WeChat/Contracts/Tools.php b/WeChat/Contracts/Tools.php
index ae33e14..99e2d32 100644
--- a/WeChat/Contracts/Tools.php
+++ b/WeChat/Contracts/Tools.php
@@ -364,12 +364,12 @@ class Tools
             $build = false;
             $mycurl = new MyCurlFile((array)$value);
             $data[$key] = $mycurl->get();
-            array_push(self::$cache_curl, $mycurl->tempname);
+            self::$cache_curl[] = $mycurl->tempname;
         } elseif (is_array($value) && isset($value['datatype']) && $value['datatype'] === 'MY_CURL_FILE') {
             $build = false;
             $mycurl = new MyCurlFile($value);
             $data[$key] = $mycurl->get();
-            array_push(self::$cache_curl, $mycurl->tempname);
+            self::$cache_curl[] = $mycurl->tempname;
         } elseif (is_string($value) && class_exists('CURLFile', false) && stripos($value, '@') === 0) {
             if (($filename = realpath(trim($value, '@'))) && file_exists($filename)) {
                 $build = false;
@@ -451,7 +451,7 @@ class Tools
             return call_user_func_array(self::$cache_callable['del'], func_get_args());
         }
         $file = self::_getCacheName($name);
-        return file_exists($file) ? unlink($file) : true;
+        return !file_exists($file) || @unlink($file);
     }
 
     /**