public function openZip($specific_entry = null)
{
include_once './libraries/zip_extension.lib.php';
$result = PMA_getZipContents($this->getName(), $specific_entry);
if (!empty($result['error'])) {
$this->_error_message = Message::rawError($result['error']);
return false;
}
$this->_content = $result['data'];
$this->_offset = 0;
return true;
}