php - 对于每个循环不起作用

Question

我有一些主类别和用户组，用户组被分配到主类别。我正在使用以下代码，但它只显示表中的最后一条记录，而我需要显示所有匹配的记录。

控制器中的功能：

function listdesignation($id) {
    $res = $this->designation_model->GetDesignation($id);
    $this->data['test'] = $res;
    if ($res) {
        foreach ($res as $row) {
            $this->data['selected_designation'] = $this->designation_model->GetDesignation_Names($row['designation_id']);
        }
        if ($this->data['selected_designation']) {
            $this->data['enable_view'] = true;
        }
    } 
}

模型中的功能：

function GetDesignation_Names($id) {
    $designation = array();
    $this->db->select('*');
    $this->db->from('delta_designation');
    $this->db->where('designation_id', $id);
    $query = $this->db->get();
    if ($query->num_rows() > 0) {
        foreach ($query->result() as $row) {
            $designation[$row->designation_id]['designation_id'] = $row->designation_id;
            $designation[$row->designation_id]['designation'] = $row->designation;
        }
        return $designation;
    }
    return false;
}

Answer 1

您正在通过foreach循环的每次迭代覆盖您的变量。您可能想要建立一个数组。

例如，而不是

foreach (...) {
    $myvar = $row->field;
}

试试这个：

$myresult = array();
foreach (...) {
    $myvar = $row->field;
    $myresult[]= $myvar;  // (append to array)
}

那么你就可以：

foreach ($myresult as $onerow) {
    ...
}