PHP将数据从3个表关系循环到每个div元素
我需要帮助。 我想在我的Codeigniter PHP页面中从3个表关系中显示div元素:PHP将数据从3个表关系循环到每个div元素,php,loops,codeigniter,Php,Loops,Codeigniter,我需要帮助。 我想在我的Codeigniter PHP页面中从3个表关系中显示div元素: my Table is= Category =>category_id, category_name Sub_Category => sub_category_id,category_id, sub_category_name Item => item_id, sub_category_id,item_name 模型= public function i
my Table is=
Category =>category_id, category_name
Sub_Category => sub_category_id,category_id, sub_category_name
Item => item_id, sub_category_id,item_name
模型=
public function item_data()
{
$query = $this->db->query('SELECT A.item_name, B.sub_category_name, C.category_name FROM
item A
sub_kategori A
LEFT JOIN sub_category B ON B.sub_category_id = A.sub_category_id
LEFT JOIN category C ON C.category_id = B.category_id
');
return $query->result();
}
控制器:
function item_view()
{
//--------
$item_data = $this->model_app->data_ticket();
$data['item_data'] = $item_data;
$this->load->view('template', $data);
}
视图:
<?php $no = 0; foreach($item_data as $row) : $no++;?>
<div class="card">
<div class="card-header">
<h3 class=""><?php echo $row->sub_category_name;?></h3>
<h5 class=""><?php echo $row->category_name;?></h5>
</div>
<div class="card-footer">
<ul>
//... How to show/Looping item_name by sub_category_id ...?
<li class="nav-item">
<a href="#" class="nav-link">
<?php echo $row->item_name;?>
</a>
</li>
</ul>
</div>
</div>
<?php endforeach;?>
我想得到数据回音=
sub_category1 => category1=>item1,item2,item3
sub_category2 => category1=>item4,item5,item6
.....
问题:
如何按子类别id显示/循环项目名称
谢谢您的帮助。我假设您的查询结果如下:
Iphone Xr 64 GB | Iphone | Apple
iphonexs128gb | Iphone | Apple
Airpod 2 |耳机|苹果
Airpod Pro |耳机|苹果
MacBookAir 2020 128Gb笔记本电脑|苹果
因此,如果您想按子类别显示组,您应该在模型或控制器中重新构造数据,而不要在视图中进行,因为嵌套php代码和html代码很难调试和重用。对于这样的结构:
[注意]
:因为查询的输出是stdclass,所以在使用我的代码之前,让我们先将其转换为数组:
$arr=json\u decode(json\u encode($yourObject),TRUE)代码>
我有一些代码供您按子类别对列表进行分组
$arr = [
['category'=>'Apple','sub_category'=>'Iphone','item'=>'Iphone XR'],
['category'=>'Apple','sub_category'=>'Iphone','item'=>'Iphone XS'],
['category'=>'Apple','sub_category'=>'Iphone','item'=>'Iphone X'],
['category'=>'Apple','sub_category'=>'HeadPhone','item'=>'AirPod 2'],
['category'=>'Apple','sub_category'=>'Laptop','item'=>'Macbook air'],
['category'=>'Samsung','sub_category'=>'MobilePhone','item'=>'Galaxy S10'],
];
$newArr = [];
foreach ($arr as $key => $item) {
$newArr[$item['sub_category']][$key] = $item;
}
结果将是:
$newArr = [
'Iphone'=>[
['category'=>'Apple','sub_category'=>'Iphone','item'=>'Iphone XR'],
['category'=>'Apple','sub_category'=>'Iphone','item'=>'Iphone XS'],
['category'=>'Apple','sub_category'=>'Iphone','item'=>'Iphone X'],
],
...
];
意见应该是:
-
因此,您有三个表,具有关系:一个项目有一个子类别是一个类别的子类别。您想按子类别显示项目组,对吗?@dewokaji请向我们展示您获得的输出和您想要实现的目标???@EricsNguyen,是的right@KUMAR谢谢,我编辑了详细问题,在重新构造数组之后,我在控制器上得到了一些错误=“不能将stdClass类型的对象用作…”中的数组”,所以,将数组替换为stdClass@Erics,非常感谢你的帮助,我非常感激。这稍微修改一下就解决了我的问题
$arr = [
['category'=>'Apple','sub_category'=>'Iphone','item'=>'Iphone XR'],
['category'=>'Apple','sub_category'=>'Iphone','item'=>'Iphone XS'],
['category'=>'Apple','sub_category'=>'Iphone','item'=>'Iphone X'],
['category'=>'Apple','sub_category'=>'HeadPhone','item'=>'AirPod 2'],
['category'=>'Apple','sub_category'=>'Laptop','item'=>'Macbook air'],
['category'=>'Samsung','sub_category'=>'MobilePhone','item'=>'Galaxy S10'],
];
$newArr = [];
foreach ($arr as $key => $item) {
$newArr[$item['sub_category']][$key] = $item;
}
$newArr = [
'Iphone'=>[
['category'=>'Apple','sub_category'=>'Iphone','item'=>'Iphone XR'],
['category'=>'Apple','sub_category'=>'Iphone','item'=>'Iphone XS'],
['category'=>'Apple','sub_category'=>'Iphone','item'=>'Iphone X'],
],
...
];