如何将＆＃34; UTF-8保存为BOM＆＃34;编码？

Question

我正在生成csv文件，但它保存为“没有BOM的UTF-8”

如何保存为“带BOM的UTF-8”？

我在codeigniter中使用了以下标题

 header('Content-Type: text/csv;charset=utf-8');

Answer 1

这已经是How can I output a UTF-8 CSV in PHP that Excel will read properly?

的副本

但是，您需要添加Byte Order Mark。这可以通过这种方式完成： https://stackoverflow.com/a/7601168/678611

<?php

header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename=<a filename>.csv');
header('Content-Transfer-Encoding: binary');

echo "\xEF\xBB\xBF"; // Byte Order Mark
echo $the_csv_file_content;
exit();

?>