อยากทราบ code วิธีใช้คำสั่ง php copy sheet1 to sheet2 (Excel)

<?
	$objExcel = new COM("Excel.Application");
	$objWorkbook = $objExcel->Workbooks->Open("C:\Scripts\testsheet.xls");
	$objExcel->Visible = true;

	$objLastSheet = $objWorkbook->Worksheets("Sheet3");
	$objWorksheet = $objWorkbook->Worksheets("Sheet1");
	$objWorksheet->Copy($objLastSheet);

	$objWorksheet = $objWorkbook->Worksheets("Sheet1 (2)");
	$objWorksheet->Name = "My New Worksheet";
?>