Laravel CSVダウンロード

共通関数にでもしておき引数渡してダウンロード

$csv = [
            ['id','user'],
            [1,'a'],
            [2,'b']
        ];

$file_name = 'CSV' . date('YmdHis');
$response = Csv::csv_download($csv, $file_name);
return $response;

<?php

namespace App\Library;

use Illuminate\Support\Facades\Facade;
use Symfony\Component\HttpFoundation\StreamedResponse;

class Csv extends Facade
{
    public static function csv_download($data, $fileName)
    {
        $response = new StreamedResponse(function () use ($data) {
            $stream = fopen('php://output', 'w');

            //　文字化け回避
            stream_filter_prepend($stream, 'convert.iconv.utf-8/cp932//TRANSLIT');

            // データからcsv生成
            foreach ($data as $key => $value) {
                fputcsv($stream, $value);
            }
            fclose($stream);
        });

        $response->headers->set('Content-Type', 'application/octet-stream');
        $response->headers->set('Content-Disposition', 'attachment; filename="' . $fileName . '.csv"');

        return $response;
    }
}