public function category_ping_count($cat_id)
{
$cat_id = intval($cat_id);
$where = "trackback_category_id = {$cat_id}\n and tbping_visible = 1";
$join['mt_trackback'] = array('condition' => "tbping_tb_id = trackback_id ");
require_once 'class.mt_tbping.php';
$tbping = new TBPing();
$count = $tbping->count(array('where' => $where, 'join' => $join));
return $count;
}
