$text = '2024年4月15日商品导出';
$filename = mb_convert_encoding($text, "GBK", "UTF-8").'.txt'; // a filename in Chinese characters
header('Content-Type: application/octet-stream');
header('Content-Disposition: filename='.$filename);
readfile(realpath('../think'));
exit();
$filename = '2024年4月5日中文文件名.txt'; // a filename in Chinese characters
$contentDispositionField = 'Content-Disposition: attachment; '
. sprintf('filename="%s"; ', rawurlencode($filename))
. sprintf("filename*=utf-8''%s", rawurlencode($filename));
header('Content-Type: application/octet-stream');
header($contentDispositionField);
readfile(realpath('../think'));
exit();
两种