CSV Export
$fh = fopen('php://output', 'w');
// Start output buffering (to capture stream contents)
ob_start();
$headings = array('Action Tracker', 'Count');
fputcsv($fh, $headings);
$item = array($action_tracker, $this_tracker_counted);
fputcsv($fh, $item);
$string = ob_get_clean();
$filename = 'stats_report_' . date('Y_m_d') .'.csv';
// Output CSV-specific headers
$now = gmdate("D, d M Y H:i:s");
header("Expires: Tue, 03 Jul 2001 06:00:00 GMT");
header("Cache-Control: max-age=0, no-cache, must-revalidate, proxy-revalidate");
header("Last-Modified: {$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={$filename}");
header("Content-Transfer-Encoding: binary");
exit($string);