public function deleteCover($id)
 {
     $object = new SimpleBlogPost($id, Context::getContext()->language->id);
     $tmp_location = _PS_TMP_IMG_DIR_ . 'ph_simpleblog_' . $object->id . '.' . $object->cover;
     if (file_exists($tmp_location)) {
         @unlink($tmp_location);
     }
     $orig_location = _PS_MODULE_DIR_ . 'ph_simpleblog/covers/' . $object->id . '.' . $object->cover;
     $thumb = _PS_MODULE_DIR_ . 'ph_simpleblog/covers/' . $object->id . '-thumb.' . $object->cover;
     $thumbWide = _PS_MODULE_DIR_ . 'ph_simpleblog/covers/' . $object->id . '-wide.' . $object->cover;
     if (file_exists($orig_location)) {
         @unlink($orig_location);
     }
     if (file_exists($thumb)) {
         @unlink($thumb);
     }
     if (file_exists($thumbWide)) {
         @unlink($thumbWide);
     }
     $object->cover = NULL;
     $object->update();
     Tools::redirectAdmin(self::$currentIndex . '&token=' . Tools::getAdminTokenLite('AdminSimpleBlogPosts') . '&conf=7');
 }