ErrorException 未定义变量 $siswa 在哪里 [英] where is an ErrorException Undefined variable $siswa

问题描述

我在上次讨论中发帖，可能不清楚我的问题.如果我创建了 2 个相同的讨论，我深表歉意现在我将附上所有信息，包括所有代码，希望能尽快修复.

还有SiswaController.php，希望能帮到大家支持我的问题.

命名空间 App\Http\Controllers;使用 Illuminate\Http\Request;使用 App\Siswa;使用会话；使用 App\Exports\SiswaExport；使用 App\Imports\SiswaImport;使用 Maatwebsite\Excel\Facades\Excel；使用 App\Http\Controllers\Controller;类 SiswaController 扩展控制器{公共函数索引(){$siswa = Siswa::all();返回视图('siswa',['siswa'=>$siswa]);}公共函数export_excel(){返回 Excel::download(new SiswaExport, 'siswa.xlsx');}公共函数 import_excel(Request $request){//验证$this->validate($request, ['文件' =>'必需| mimes:csv,xls,xlsx']);//menangkap文件excel$file = $request->file('file');//membuat nama文件unik$nama_file = rand().$file->getClientOriginalName();//上传ke文件夹file_siswa di dalam文件夹public$file->move('file_siswa',$nama_file);//导入数据Excel::import(new SiswaImport, public_path('/file_siswa/'.$nama_file));//通知 dengan 会话Session::flash('sukses','Data Siswa Berhasil Diimport!');//阿里坎哈拉曼肯巴利返回重定向('/siswa')；}}

有siswa.blade.php

 <头><tr><th>No</th><th>Nama</th><th>NIS</th><th>Alamat</th></tr></thead>@php $i=1 @endphp@foreach($siswa 作为 $s)<tr><td>{{ $i++ }}</td><td>{{$s->nama}}</td><td>{{$s->nis}}</td><td>{{$s->alamat}}</td></tr>@endforeach</tbody>

有web.php

解决方案

在你的路由文件 web.php

Route::get('/', function () {返回视图('siswa');});

这里 $siswa 没有被传递，所以它产生了未定义的变量 $siswa.

我想你想把它导入SiswaController@index

I was posting on last discussion, may be is no clear my problem. I'm apologize if I was created 2 same discussion And now I will attach all information including all code, I hope it can be fixed soon.

and there are SiswaController.php, I hope can help all of you for support my problem.

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Siswa;

use Session;


use App\Exports\SiswaExport;
use App\Imports\SiswaImport;
use Maatwebsite\Excel\Facades\Excel;
use App\Http\Controllers\Controller;

class SiswaController extends Controller
{
    public function index()
    {
        $siswa = Siswa::all();
        return view('siswa',['siswa'=>$siswa]);
    }

    public function export_excel()
    {
        return Excel::download(new SiswaExport, 'siswa.xlsx');
    }

    public function import_excel(Request $request) 
    {
        // validasi
        $this->validate($request, [
            'file' => 'required|mimes:csv,xls,xlsx'
        ]);

        // menangkap file excel
        $file = $request->file('file');

        // membuat nama file unik
        $nama_file = rand().$file->getClientOriginalName();

        // upload ke folder file_siswa di dalam folder public
        $file->move('file_siswa',$nama_file);

        // import data
        Excel::import(new SiswaImport, public_path('/file_siswa/'.$nama_file));

        // notifikasi dengan session
        Session::flash('sukses','Data Siswa Berhasil Diimport!');

        // alihkan halaman kembali
        return redirect('/siswa');
    }
}

There is siswa.blade.php

        <a href="/siswa/export_excel" class="btn btn-success my-3" target="_blank">EXPORT EXCEL</a>

        <table class='table table-bordered'>
            <thead>
                <tr>
                    <th>No</th>
                    <th>Nama</th>
                    <th>NIS</th>
                    <th>Alamat</th>
                </tr>
            </thead>
            <tbody>
                @php $i=1 @endphp
                @foreach($siswa as $s)
                <tr>
                    <td>{{ $i++ }}</td>
                    <td>{{$s->nama}}</td>
                    <td>{{$s->nis}}</td>
                    <td>{{$s->alamat}}</td>
                </tr>
                @endforeach
            </tbody>
        </table>
    </div>

There are web.php

<?php

use Illuminate\Support\Facades\Route;

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

Route::get('/', 'SiswaController@index');
Route::get('/siswa', 'SiswaController@index');
Route::get('/siswa/export_excel', 'SiswaController@export_excel');
Route::post('/siswa/import_excel', 'SiswaController@import_excel');

解决方案

In your route file web.php

Route::get('/', function () {
    return view('siswa');
});

here $siswa is not passed, so it is resulting undefined variable $siswa.

I think you want to direct it into SiswaController@index

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