SATE-EasyReceipt/app/Http/Controllers/PDFController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use PDF;

class PDFController extends Controller
{
    public function index()
    {

        // https://wkhtmltopdf.org/usage/wkhtmltopdf.txt


        // $pdf = PDF::loadHTML('<h1>Hello World 岩渕</h1>');
        $pdf = PDF::loadView('pdf');


        // はがきサイズを指定
        $pdf->setOption('page-height', 148)
            ->setOption('page-width', 100)
            ->setOption('encoding', 'utf-8');
        return $pdf->inline();
    }
}