DESToon获取任意栏目名称的方法

function cat_name($catid) {
global $db;
$catid = intval($catid);
$catname = '';
    $r = $db->get_one("SELECt catname FROM {$db->pre}category WHERe catid=$catid");
    $catname = $r['catname'];
return $catname;
}