แปลงตัวเลขให้เป็นวันที่ ต้องทำไงค่ะพลิกแผ่นดินแล้วไม่ได้เลย ช่วยด้วยค่ะ

session_start();
require("include/connect.php");
require("include/function.php");
$today=date("d-m-Y H:i:s"); 
$date=date("dmY");
switch($_GET[type]){
	case "Select" :

break;
	case "ImportRTBS" :	
	/** PHPExcel */
	require_once 'Classes/PHPExcel.php';
	
	/** PHPExcel_IOFactory - Reader */
	include 'Classes/PHPExcel/IOFactory.php';
	
	
	$inputFileName = "D:\RTBS\RTBS.xls";  
	$inputFileType = PHPExcel_IOFactory::identify($inputFileName);  
	$objReader = PHPExcel_IOFactory::createReader($inputFileType);  
	$objReader->setReadDataOnly(true);  
	$objPHPExcel = $objReader->load($inputFileName);  
	
	$objWorksheet = $objPHPExcel->setActiveSheetIndex(0);
	$highestRow = $objWorksheet->getHighestRow();
	$highestColumn = $objWorksheet->getHighestColumn();
	
	$headingsArray = $objWorksheet->rangeToArray('A1:'.$highestColumn.'1',null, true, true, true);
	$headingsArray = $headingsArray[1];
	
	$r = -1;
	$namedDataArray = array();
	for ($row = 2; $row <= $highestRow; ++$row) {
		$dataRow = $objWorksheet->rangeToArray('A'.$row.':'.$highestColumn.$row,null, true, true, true);
		if ((isset($dataRow[$row]['A'])) && ($dataRow[$row]['A'] > '')) {
			++$r;
			foreach($headingsArray as $columnKey => $columnHeading) {
				$namedDataArray[$r][$columnHeading] = $dataRow[$row][$columnKey];
			}
		}
	}
	$i = 0;
	foreach ($namedDataArray as $result) {
			$i++;
		
			$TableRTBSIns = "tbl_rtbs";
			$FieldRTBSIns = "Site,[Order No],[Line No],[Del No],[Line Item No],[RTBS Line Item No],[Customer PO No],Reference,[Sales Part No],Description,";
			$FieldRTBSIns.= "Type,Customer,[Customer Name],[Customer Product Code],[Customer Product Description],[Delay By],[Delay Cause],[Delay Description],";
			$FieldRTBSIns.= "[Customer Line Status],[Shop Order Status],Export,RTBS,[Original RTBS],[Changed Date],[Changed By],[Original Lot Size],[Lot Size],";
			$FieldRTBSIns.= "[Pre pack ],[Log Pack],[Shop Order Qty Completed],[Qty Delivered],[Remaining Delivered Qty],[Package Type],Copyright,[Purge Order],";
			$FieldRTBSIns.= "Coordinator,[Coordinator Name],Sound,[Sound Description],[Sales Type],[Sales Description],[Print Part Group],[Print Part Group Description],";
			$FieldRTBSIns.= "Country,[Ship to Address],[New Master],user_log";
			$ValueRTBSIns = "'".$result["Site"]."','".$result["Order No"]."','".$result["Line No"]."','".$result["Del No"]."','".$result["Line Item No"]."',";
			$ValueRTBSIns.= "'".$result["RTBS Line Item No"]."','".$result["Customer PO No"]."','".$result["Reference"]."','".$result["Sales Part No"]."',";
			$ValueRTBSIns.= "'".$result["Description"]."','".$result["Type"]."','".$result["Customer"]."','".$result["Customer Name"]."','".$result["Customer Product Code"]."',";
			$ValueRTBSIns.= "'".$result["Customer Product Description"]."','".$result["Delay By"]."','".$result["Delay Cause"]."','".$result["Delay Description"]."',";
			$ValueRTBSIns.= "'".$result["Customer Line Status"]."','".$result["Shop Order Status"]."','".$result["Export"]."','".$result["RTBS"]."','".$result["Original RTBS"]."',";
			$ValueRTBSIns.= "'".$result["Changed Date"]."','".$result["Changed By"]."','".$result["Original Lot Size"]."','".$result["Lot Size"]."','".$result["Pre pack "]."',";
			$ValueRTBSIns.= "'".$result["Log Pack"]."','".$result["Shop Order Qty Completed"]."','".$result["Qty Delivered"]."','".$result["Remaining Delivered Qty"]."',";
			$ValueRTBSIns.= "'".$result["Package Type"]."','".$result["Copyright"]."','".$result["Purge Order"]."','".$result["Coordinator"]."','".$result["Coordinator Name"]."',";
			$ValueRTBSIns.= "'".$result["Sound"]."','".$result["Sound Description"]."','".$result["Sales Type"]."','".$result["Sales Description"]."',";
			$ValueRTBSIns.= "'".$result["Print Part Group"]."','".$result["Print Part Group Description"]."','".$result["Country"]."','".$result["Ship to Address"]."',";
			$ValueRTBSIns.= "'".$result["New Master"]."','".$_SESSION[u_user]."'";
			$objRTBSIns = funInsert($TableRTBSIns,$FieldRTBSIns,$ValueRTBSIns);

	}
		echo  "<script>alert('Delete and Insert OK');window.location='index.php';</script>";	

	mssql_close($objConnect);
	
	break;}