function delete($del = true)
 {
     parent::delete();
     if ($del) {
         unlink($this->fullPath());
         if ($this->thumbnail) {
             unlink($this->baseDir . $this->thumbnail);
         }
     }
 }
 function delete()
 {
     parent::delete();
     if ($this->thumbnail) {
         unlink($this->fileDir() . $this->thumbnail);
     }
     if ($this->allFile) {
         unlink($this->allFile);
     }
     rmdir($this->fileDir());
 }