publish and unpublic joomla function

<?php
function publish($cid = array(), $publish = 1)
	{
		if (count( $cid ))
		{
			$cids = implode( ',', $cid );

			$query = 'UPDATE #__table'
				. ' SET published = ' . intval( $publish )
				. ' WHERE id IN ( '.$cids.' )';
			$this->_db->setQuery( $query );
			if (!$this->_db->query()) {
				$this->setError($this->_db->getErrorMsg());
				return false;
			}
		}

		return true;
	}
?>