Create CSV

if (!empty($form_data)) {
		ob_start();
		foreach ($form_data as $line) {
			echo implode(',', $line)."\r";
		}
		$csv_data = ob_get_contents();
		ob_end_clean();
		$file_name = 'webinar'.$_REQUEST['id'].'.csv';
		header('Content-Type: application/octet-stream');
		header('Content-Length: '.strlen($csv_data));
		header('Content-Disposition: attachment; filename='.$file_name);
		header('Content-Transfer-Encoding: binary');
		echo $csv_data;  
		}