$Excel = new PHPExcel();
$Excel->getActiveSheet()->setCellValue('A1', 'Kişi / Kurum Adı (*)');
$Excel->getActiveSheet()->setCellValue('B1', 'Adresi (*)');
$Excel->getActiveSheet()->setCellValue('C1', 'İl');
$tur = 2; // 2. satırdan başlasın.
$siparis = $db->query("SELECT * FROM orders");
if($siparis){
foreach($siparis as $row){
                $Excel->getActiveSheet()->setCellValue("A$tur", $row["receiverName"]);
                $Excel->getActiveSheet()->setCellValue("B$tur", $row["receiverAddress"]);
                $Excel->getActiveSheet()->setCellValue("C$tur", $row["receiverCity"]);
                $tur++;
            }
}
$Kaydet = PHPExcel_IOFactory::createWriter($Excel, 'Excel5');
header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename="'.time().'.xls"');
header('Cache-Control: max-age=0');
$Kaydet->save('php://output');
die();