PianoTime/app/Http/Controllers/TestController.php

<?php

namespace App\Http\Controllers;

use App\Models\StudentCourse;
use App\Services\Admin\AdminUser;
use Carbon\Carbon;
use Illuminate\Http\Request;

class TestController extends Controller
{
    public function index(Request $request)
    {
        $items = collect([
            collect(['key' => 1, 'value' => 1, 'show_value' => '公告']),
            collect(['key' => 2, 'value' => 2, 'show_value' => '活动']),
            collect(['key' => 3, 'value' => 3, 'show_value' => '视频']),
            collect(['key' => 4, 'value' => 4, 'show_value' => '文章']),
        ]);
        dd($items->where('key', 1)->first());
    }
}