解码问题

@@ -19,7 +19,7 @@ use function Swoole\Coroutine\Http\request;
  */
 class MailListV2 extends Base {
 
-    private $cache = 0;
+    private $cache = 600;
 
     /**
      * 当前邮箱下指定的文件夹

@@ -37,7 +37,19 @@ class MailFun {
      * @time 2023/3/27 13:55
      */
     public static function mb_coding(string $str,array $appcode=[]){
-        return (new Header())->decode(trim($str," \t\n\r"));
+        $str = (new Header())->decode(trim($str," \t\n\r"));
+//        if(str_starts_with($str, '=?')){
+//            try {
+//                $encode = @mb_detect_encoding($str, array_merge(array("ASCII",'UTF-8',"GB2312","GBK",'BIG5'),$appcode));
+//                if($encode){
+//                    return @mb_convert_encoding($str, 'UTF-8', $encode);
+//                }
+//            }catch (\Throwable $e){
+//
+//            }
+//        }
+
+        return $str;
     }