Silex/Symfony - output CSV

Silex - Symfony - output CSV as stream

function outputCSV(Application $app, array $recs, $filename)
{
    $stream = function() use ($recs) {
        $output = fopen('php://output', 'w');
        foreach ($recs as $rec)
        {
            fputcsv($output, $rec);
        }
        fclose($output);
    };

    return $app->stream($stream, 200, array(
        'Content-Type' => 'text/csv',
        'Content-Description' => 'File Transfer',
        'Content-Disposition' => 'attachment; filename="'.urlencode($filename).'',
        'Expires' => '0',
        'Cache-Control' => 'must-revalidate',
        'Pragma' => 'public',
    ));
}

Awesome stuff! Thanks for this.