在整数 Laravel 5.4 上调用成员函数 count()

Question

I have database row called cat_id and in this row i have categories id's from 1-17我有名为 cat_id 的数据库行，在这一行我有 1-17 的类别 ID

How could i show count of category no 17?我如何显示第 17 类的数量？

Answer 1

Add this to your controller将此添加到您的控制器

$data['count'] = your_table::where('cat_id',17)->count();
return view("YOUR_VIEW_PATH", $data);

Use it in your blade template在您的刀片模板中使用它

<div>{!! $count !!}</div>

Answer 2

Using sql query使用sql查询

SELECT COUNT(*) from table_name where cat_id = 17

Or if you have query results like $rows = data_array then you can use php like或者，如果您有像$rows = data_array这样的查询结果，那么您可以像这样使用 php

$count = count(array_filter($rows, function($item) { return $item['cat_id'] === 17; }));