php - 通过Codeigniter从MySQL表中获取数据

Question

我在从 codeigniter Controller 中获取此数据时遇到问题。

    $q = $this->db->get('offers_orders');
    $this->db->select('total');
    $this->db->where('order_number', $orderid);


    $orderdata = $q->result_array();

    $orderamount = $orderdata[0]['total'];

你发现这段代码有什么问题吗？

Answer 1

是的，尝试一下:

$this->db->select('count(*) as total', false);
$this->db->where('order_number', $orderid);
$q = $this->db->get('offers_orders');

或者，

$q = $this->db->select('count(*) as total', false)->where('order_number', $orderid)->get('offers_orders');