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<?php
/**
* Elgg metastrngs
* Functions to manage object metastrings.
*
* @package Elgg
* @subpackage Core
* @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
* @author Marcus Povey <marcus@dushka.co.uk>
* @copyright Curverider Ltd 2008
* @link http://elgg.org/
*/
/**
* Return the meta string id for a given tag, or false.
*
* @param string $tag The value (whatever that is) to be stored
* @return mixed Integer tag or false.
*/
function get_metastring_id($tag)
{
global $CONFIG;
$tag = sanitise_string($tag);
$row = get_data_row("SELECT * from {$CONFIG->dbprefix}metastrings where tag='$tag' limit 1");
if ($row)
return $row->id;
return false;
}
/**
* Add a metastring.
* It returns the id of the tag, whether by creating it or updating it.
*
* @param string $tag The value (whatever that is) to be stored
* @return mixed Integer tag or false.
*/
function add_metastring($tag)
{
global $CONFIG;
$tag = sanitise_string($tag);
$id = get_metastring_id($tag);
if ($id) return $id;
return insert_data("INSERT into {$CONFIG->dbprefix}metastrings (tag) values ('$tag')");
}
?>
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