Microsoft Excel mangles Diacritics in .csv files?

Question

I am programmatically exporting data (using PHP 5.2) into a .csv test file.
Example data: Numéro 1 (note the accented e). The data is utf-8 (

Answer 1

As Fregal said \uFEFF is the way to go.

<%@LANGUAGE="JAVASCRIPT" CODEPAGE="65001"%>
<%
Response.Clear();
Response.ContentType = "text/csv";
Response.Charset = "utf-8";
Response.AddHeader("Content-Disposition", "attachment; filename=excelTest.csv");
Response.Write("\uFEFF");
// csv text here
%>