How can I output a UTF-8 CSV that Excel will read properly?

[KenDzz]

https://imgur.com/BD1V12I

$_csvEncoding= 'UTF-8';
        $_dataEncoding = 'UTF-8';
        $_newline = "\r\n";
        $_eol = "\r\n";
        $_bom = true;
        $timestamp = time();
        $this->response = $this->response->withDownload('test-'.$timestamp.'.csv');
        $this->set(compact('data', '_dataEncoding' ,'_csvEncoding', '_newline', '_eol', '_bom'));
        $this->viewBuilder()
        ->setClassName('CsvView.Csv')
        ->setOptions([
            'serialize' => 'data',
            'header' => $header,
'extract' => $extract,
]);

It doesn't work.
someone please help me!

Thank you

[Tatsurou-Yajima]

@KenDzz
How about trying to add a BOM to the CSV file?

How to do this is described in the following article.

https://yajimaga-tech-blog.vercel.app/posts/20230817

It is written in Japanese, so please translate if necessary.