Convertir fichero CSV a Excel

include 'PHPExcel/IOFactory.php';
$objReader = PHPExcel_IOFactory::createReader('CSV');
$objReader->setDelimiter(";");
$objReader->setInputEncoding('UTF-8');
$objPHPExcel = $objReader->load('MyCSVFile.csv');
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');
$objWriter->save('MyExcelFile.xls');