从 Laravel 的数据库中获取数据

Question

I want to fetch data from database table named 'users' and display the output in a table.

I have written below code but it's not working.

I am using Laravel 5.5

@extends('layouts.app')


@section('content')

<div class="container">

<h2>Admin Panel</h2>

<p>Data of the Registered Users.</p> 

<table class="table table-bordered">

<thead>

<tr>

<th>Id</th>

<th>Name</th>

<th>Email</th>

</tr>

</thead>

<tbody>

$users = DB::table('users')->select('id','name','email')->get();

@foreach($users as $value)

<tr>

<td>{{ $value->id }}</td>

<td>{{ $value->name }}</td>

<td>{{ $value->email }}</td>

</tr>

@endforeach

</tbody>

</table>

</div>


@endsection

Error: Undefined Variable: users

Answer 1

The problem is that you're trying to mix PHP within your (Blade) template. Although it is possible to do so with @php directives, this is bad practice: your view should not contain any business logic.

Ideally you want to pass this data from your controller. It should look something like this:

use Illuminate\Support\Facades\DB;

class UserController extends Controller
{
    public function index()
    {
        $users = DB::table('users')->select('id','name','email')->get();

        return view('some-view')->with('users', $users);
    }
}

Read more on passing data to views here .

Answer 2

You are doing it all wrong, the point of MVC design is to have your controllers do the application logic, your views to represent a representation of that data and models to contain the data you need , in your case you are missing the point completely by using DB::table inside of your view, so here is an example code which you might need to correct a bit :

The example below doesn't show MVC pattern since the data is passed from inside a closure of a route

web.php

Route::get('/', function () {
    $users = DB::table('users')->select('id','name','email')->get();
    return view('VIEW-NAME-HERE', compact('users'));
});

view.blade.php

@foreach($users as $user)
   {{ $user->id }} {{ $user->name }} {{ $user->email }}
@endforeach

Change VIEW-NAME-HERE with the name of your view file, for example index or users.index

Answer 3

You Are using php in blade file first make controller for controller run a command in terminal php artisan make:controller usercontroller

then write this:

class usercontroller extends Controller
{
    public function index()
    {
        $users = DB::table('users')->select('id','name','email')->get();

        $data = compact('users')
        return view('your-view-name')->with('$data');
    }
}