Question

$total_cost_for_A = $this->admin_model->total_cost_for_A($branch, $department, $date);
$total_cost_for_B = $this->admin_model->total_cost_for_B($branch, $department, $date);

变量 $ total_cost_for_A和$ total_cost_for_B 保存模型中mysql求和查询的返回值。如果未找到记录，则查询返回false。现在，我正在尝试执行此操作。

if(($total_cost_for_A === FALSE) && ($total_cost_for_B === FALSE))
{
  $data['no_record'] = 'No Record Found!';
  $this->load->view('admin/bookings', $data);
}
else
{
    $this->load->view('admin/summary', $data);
}

此测试总是失败并改为执行else语句，而不是什么。任何帮助将不胜感激。感谢

以下是功能

    function total_cost_for_A($branch, $department, $date)
    {
        if($branch == 'Head Office' && $department == 'Summary')
        {
            $select_amount_paid = 'SELECT SUM(total_amount) total_amount FROM graphics_booking AS bk
            WHERE bk.date = "'.$date.'"';
        }

        $result = $this->db->query($select_amount_paid);

        if($result->num_rows() > 0)
        {
            return $result;
        }
        else
        {
            return FALSE;
        }
    }


    function total_cost_for_B($branch, $department, $date)
    {
        if($branch == 'Head Office' && $department == 'Summary')
        {
            $total_LF_amount = 'SELECT SUM(total_amount) total_amount FROM large_format_print
            WHERE date = "'.$date.'"';
        }

        $result = $this->db->query($total_LF_amount);

        if($result->num_rows() > 0)
        {
            return $result;
        }
        else
        {
            return FALSE;
        }
    }

Answer 1

空对象不是假的。

至于您的评论，请确保total_cost_for_A 并且B实际上正在返回一些东西。并确保他们在失败时返回false。这是条件评估为真的唯一方法。

您正在使用严格的相等比较，因此除非您返回false！

，否则它们永远不会等于false

if(($total_cost_for_A == FALSE) && ($total_cost_for_B == FALSE))

以上应该有效，因为空数组是假的。

Answer 2

您的比较似乎需要使用$ total_cost_ 用于 _A和$ total_cost_ 用于 _B

你的变量名称中缺少“for”。

PHP / Codeigniter逻辑运算符

2 个答案: