//读取广告function get_ad_id($ad_id){    //读取指定ad_id广告    $sql = 'select * from '. $GLOBALS['ecs']->table('ad') .'where ad_id = '.$ad_id;    $result = $GLOBALS['db']->GetAll($sql);    $result[0]['url'] = 'http://localhost'.url_domain().'affiche.php?ad_id='.$result[0]['ad_id'].'&from=&uri='.$result[0]['ad_link'];    return $result;}function get_ad_class($position_id){    //读取分类下所有广告    $sql = 'select * from '. $GLOBALS['ecs']->table('ad') .'where position_id = '.$position_id;    $result = $GLOBALS['db']->GetAll($sql);    foreach($result as $k=>$v){        $result[$k]['url'] = 'http://localhost'.url_domain().'affiche.php?ad_id='.$v['ad_id'].'&from=&uri='.$v['ad_link'];            }    return $result;    }