Encoding accents csv - PHP - php

Question

I've been looking through all the answers here and I haven't found the solution.
Here's what I got:
MySQL :
Database & Table encoding => utf8_unicode_ci
I'm trying to convert a an array (containing rows from a query) to CSV
however when i open the csv I get this
Prénom
instead of
Prénom
here's my code
$allQueryRows = array();
while($row_query = $stmt_select->fetch(PDO::FETCH_ASSOC)){
$row_query = array_map("utf8_encode", $row_query);
array_push($allQueryRows, $row_query);
}
download_send_headers("csv" . date("Y-m-d") . ".csv");
echo array2csv($allQueryRows);
die();
function array2csv(array &$array)
{
if (count($array) == 0) {
return null;
}
ob_start();
$df = fopen("php://output", 'w');
fputcsv($df, array_keys(reset($array)));
foreach ($array as $row) {
fputcsv($df, $row);
}
fclose($df);
return ob_get_clean();
}
function download_send_headers($filename) {
// disable caching
$now = gmdate("D, d M Y H:i:s");
header("Expires: Tue, 03 Jul 2001 06:00:00 GMT");
header("Cache-Control: max-age=0, no-cache, must-revalidate, proxy-revalidate");
header("Last-Modified: {$now} GMT");
// force download
header("Content-Type: application/force-download");
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");
// disposition / encoding on response body
header("Content-Disposition: attachment;filename={$filename}");
header("Content-Transfer-Encoding: binary");
}

Answer 1

You should send a SET NAMES utf8; MySQL query before your SELECT query instead of array_mapping your data after.
Then in HTTP headers, send
Content-Type: text/csv; charset=utf-8;

Answer 2

AT first blush it looks like a utf-16 / utf-8 issue. Here's how to start to diagnose it:
First, when you say, "however when i open the csv I get this" what do you mean by "open", i.e. open with what?
I would suggest looking at the file in hex to see exactly what is in the file. It could be that what you are opening it in (your editor or whatever) is what is causing the display coming into your eye ball to be wrong OR it could be that the underlying data that your opening program is seeing is wrong. I think you need to sort out that question first.
(Tip: In general this is the old process of divide and conquer: find a way to test somewhere in the middle of your problem to see which half of your system is causing the problem. The quickest results come from picking test points about half way in the middle of the complexity, not near an edge of the problem, i.e. a Boolean search for the bug. It might not find the problem in the first iteration, but it will help narrow it down.)
Also perhaps you need to tell SQL which to use, e.g. $connection->set_charset("utf8");
Or perhaps what you are seeing is actually being displayed differently from what you think it is because of a utf8/utf16 display level mixup. I generally set stay with utf8 and so set Content-Type: text/plain; charset=UTF-8; (Also if you are viewing this file via your editor make sure it's set to the correct character space.)