CSV via HTTP response by PHP

cvs-response.php

<?php
ob_start();
header('Content-Type: text/plain;charset=UTF-8');
$stream = fopen('php://output', 'w');

fputcsv($stream, array(1, 2, 3));
fputcsv($stream, array(4, 5, 6));
// more complex codes would be here. It may cause error.

header("Content-Type: application/octet-stream");
header("Content-Disposition: attachment; filename=output.csv");
echo mb_convert_encoding(ob_get_clean(), 'SJIS', 'UTF-8');