yii send csv file charset - php

Question

I work with yii-powered application. My goal is write controller action what exporting some data from mongodb to csv file using Yii 1.1: csvexport and CHttpRequest::sendFile
My code:
public function actionCatalogDataExport( $catalog_id )
{
// prepare all needed variables here
$data = ..., $headers = ..., $filename = ...
Yii::import('ext.csv.ECSVExport');
$csv = new ECSVExport($data);
$output = $csv->setHeaders($headers)->setDelimiter(',')->toCSV();
Yii::app()->getRequest()->sendFile($filename, $output, "text/csv", true);
}
This script works properly, but if I open resulting file via Excel I see something like that:
There are some problems with file encoding... I opened notepad++ and changed encoding to UTF-8 without BOM, now file looks good (language: Ru):
Tested this fixes but no success results:
header('Content-type: text/csv; charset=UTF-8'); // no effect
Yii::app()->getRequest()->sendFile(
$filename,
$output,
"text/csv; charset=UTF-8", // no effect
true
);
How can I achieve this immediately after yii send file action?

Answer 1

Try to add the encode to begin of the csv file like this:
$encode = "\xEF\xBB\xBF"; // UTF-8 BOM
$content = $encode . $csv->toCSV();
//var_dump($content);
Yii::app()->getRequest()->sendFile($filename, $content, "text/csv; charset=UTF-8", false);

Answer 2

By default setup params, Excel for Windows opens csv files using windows-1251 encoding. If I need to make correct data values using this encoding I must use iconv
foreach( $data as $key => &$value ) {
$value = iconv('UTF-8', 'windows-1251', $value);
}
// send file to user...
// ...and it works as I need.