你可以转换你的CSV字符串与iconv。 例如:

$csvString = "Möckmühl;in Möckmühl ist die Hölle los\n";
file_put_contents('path/newTest.csv',iconv("UTF-8", "ISO-8859-1//TRANSLIT",$csvString) );

我也有同样(或类似)的问题。

在我的情况下，如果我添加一个BOM输出，它工作:

header('Content-Encoding: UTF-8');
header('Content-type: text/csv; charset=UTF-8');
header('Content-Disposition: attachment; filename=Customers_Export.csv');
echo "\xEF\xBB\xBF"; // UTF-8 BOM

我相信这是一个非常丑陋的黑客，但它对我有效，至少对Excel 2007 Windows有效。不确定在Mac上能不能用。

当你把它保存为txt文件，他们用逗号作为分隔符在excel中打开它时，问题还会发生吗?

问题可能根本不是编码，可能只是文件不是一个完美的CSV根据excel标准。

你必须使用“Windows-1252”编码。

header('Content-Encoding: Windows-1252');
header('Content-type: text/csv; charset=Windows-1252');
header("Content-Disposition: attachment; filename={$filename}");

也许你需要转换你的字符串:

private function convertToWindowsCharset($string) {
  $encoding = mb_detect_encoding($string);

  return iconv($encoding, "Windows-1252", $string);
}

EASY solution for Mac Excel 2008: I struggled with this soo many times, but here was my easy fix: Open the .csv file in Textwrangler which should open your UTF-8 chars correctly. Now in the bottom status bar change the file format from "Unicode (UTF-8)" to "Western (ISO Latin 1)" and save the file. Now go to your Mac Excel 2008 and select File > Import > Select csv > Find your file > in File origin select "Windows (ANSI)" and voila the UTF-8 chars are showing correctly. At least it does for me...

Excel不支持UTF-8。您必须将UTF-8文本编码为UCS-2LE。

mb_convert_encoding($output, 'UCS-2LE', 'UTF-8');