1

@@ -268,6 +268,10 @@ class Imap {
      */
     public function selectFolder($folder='INBOX'){
 
+        if(empty($folder)){
+            throw new \Exception('select folder('.$folder.') not fount');
+        }
+
         // 选择文件夹
         $result = $this->request("SELECT \"{$folder}\"");
         if($result[0] != 'ok'){