<?php

namespace AppHttpControllers;

use IlluminateHttpRequest;
use AppExportsMttRegistrationsExport;
use MaatwebsiteExcelFacadesExcel;

class ExcelController extends Controller
{
    public function export($id)
    {
        return Excel::download(new MttRegistrationsExport, 'MttRegistrations.xlsx', compact('id'));
    }
}

<?php

namespace AppExports;

use AppMttRegistration;
use MaatwebsiteExcelConcernsFromCollection;

class MttRegistrationsExport implements FromCollection
{
    /**
    * @return IlluminateSupportCollection
    */
    public function collection()
    {
        return MttRegistration::where('lifeskill_id',$id)->get()([
            'first_name', 'email'
        ]);
    }
}

Route::get('/mtt/attendance/{id}',[
    'as' => 'mtt.attendance',
    'uses' => 'ExcelController@export']);