php函数API接口的一段代码，不为什么就是想放在这里

 public function getRealTime()
    {
        global $db, $res;
        dbc();
        @$p = $_GET['page'] == "" ? 1 : $_GET['page'];//获取用户选择的页码
        @$pagesize = $_GET['limit'] == "" ? 10 : $_GET['limit'];//获取用户选择的每页显示多少条数据
        @$keys = $_GET['keys'];//获取用户选择的每页显示多少条数据
        @$fromTime = $_GET['fromTime'];//开始时间
        @$toTime = $_GET['toTime'];//结束时间
        @$limit = ($p - 1) * $pagesize;//偏移量

        //筛选全部记录并随前端自动分页展示;
        //$sql = "select a.uniacid,a.should_paid,a.id,a.paid_at,b.uniacid,a.status,a.leader_id,b.name,b.short_name,b.dpopen,a.user_id,c.userid,c.name AS leader_name,c.title,c.mobile,d.id,d.name AS member_name,d.phone,CONCAT(d.city,d.area) AS member_address from " . $db->table('orders');
        $sql = "select a.uniacid,a.should_paid,a.id,a.paid_at,b.uniacid,a.status,a.leader_id,a.all_num AS num,b.name,b.short_name,b.dpopen,a.user_id,c.userid,c.name AS leader_name,c.title,c.mobile,d.id,d.name AS member_name,CONCAT(d.address_name,d.address_other) AS member_address,d.phone,e.order_id,e.pro_id,f.id,f.name AS pname,f.unit from " . $db->table('orders');
        $sql .= " AS a, " . $db->table('set_basic') . " AS b, " . $db->table('leader') . " AS c," . $db->table('member') . " AS d," . $db->table('order_items') . " AS e," . $db->table('products') . " AS f";
        $sql .= " WHERE a.paid_at  '' AND a.uniacid = b.uniacid AND b.dpopen = 1 AND a.leader_id = c.userid AND a.user_id = d.id AND a.id = e.order_id AND e.pro_id = f.id";
        //按照站点筛选;
        IF ($keys != "") {
            $sql .= " AND a.uniacid = " . $keys;
        }
        //按照时间筛选;
        IF ($fromTime != "") {
            $sql .= " AND date_format(a.paid_at,'%Y-%m-%d') >= '$fromTime'";
        }
        IF ($toTime != "") {
            $sql .= " AND date_format(a.paid_at,'%Y-%m-%d')