รบกวนดูโค้ดให้ทีคับ อยากให้รับข้อมูลเสร็จแล้วกลับไปฟอร์มเดิม

<?php
	include_once "../../includes/functionLib.php";	

	if($_POST){
		
		
		$studentCode = $_POST["studentCode"];
		$studentPrename = trim($_POST["studentPrename"]);
		$studentFirstname = trim($_POST["studentFirstname"]);
		$studentLastname = trim($_POST["studentLastname"]);
		$studentNickname = trim($_POST["studentNickname"]);
		$studentNo = trim($_POST["studentNo"]);
		$studentBuildingname = trim($_POST["studentBuildingname"]);
		$studentSoi = trim($_POST["studentSoi"]);
		$studentRoad = trim($_POST["studentRoad"]);
		$studentDistrict = trim($_POST["studentDistrict"]);
		$studentAmphur = trim($_POST["studentAmphur"]);
		$studentProvince = trim($_POST["studentProvince"]);
		$studentPostcode = trim($_POST["studentPostcode"]);
		$studentPhone = trim($_POST["studentPhone"]);
		$studentMobile = trim($_POST["studentMobile"]);
		$studentEmail = trim($_POST["studentEmail"]);
		$studentBirthday = trim($_POST["studentBirthday"]);
		$studentRemark = trim($_POST["studentRemark"]);
		
		
		//chack student wa sum mai & db
		$strSQL = "SELECT * FROM student WHERE studentCode = '".$_POST["studentCode"]."' ";
		$objRec = $db->Execute($strSQL);
		if(!$objRec->EOF)
		{
			//echo("ContactCode already exist.");
		}
		else
		{
			$strSQL = "";
			$strSQL .= "INSERT INTO student";
			$strSQL .= "(studentCode, studentPrename, studentFirstname, studentLastname, studentNickname, studentNo, studentBuildingname, studentSoi, studentRoad, studentDistrict, studentAmphur, studentProvince, studentPostcode, studentPhone, studentMobile, studentEmail, studentBirthday, studentRemark) ";
			$strSQL .= "VALUES ";
			$strSQL .= "('".$_POST["studentCode"]."',";
			$strSQL .= "'".$_POST["studentPrename"]."',";
			$strSQL .= "'".$_POST["studentFirstname"]."',";
			$strSQL .= "'".$_POST["studentLastname"]."',";
			$strSQL .= "'".$_POST["studentNickname"]."',";
			$strSQL .= "'".$_POST["studentNo"]."',";
			$strSQL .= "'".$_POST["studentBuildingname"]."',";
			$strSQL .= "'".$_POST["studentSoi"]."',";
			$strSQL .= "'".$_POST["studentRoad"]."',";
			$strSQL .= "'".$_POST["studentDistrict"]."',";
			$strSQL .= "'".$_POST["studentAmphur"]."',";
			$strSQL .= "'".$_POST["studentProvince"]."',";
			$strSQL .= "'".$_POST["studentPostcode"]."',";
			$strSQL .= "'".$_POST["studentPhone"]."',";
			$strSQL .= "'".$_POST["studentMobile"]."',";
			$strSQL .= "'".$_POST["studentEmail"]."',";
			$strSQL .= "'".$_POST["studentBirthday"]."',";
			$strSQL .= "'".$_POST["studentRemark"]."')";
			 $flgSave = $db->Execute($strSQL); 
			 //or die(MYSQL_error() chack error *petch comment
			If($flgSave)
			{
				echo("Save Done."); 
				echo '<br>';  
				echo 'Now:       '. date('Y-m-d') ."\n";
			}
			else
			{
				echo("Error Save");
			}
		}
	}//end $_POST
	
	//show province wow
	foreach($province_type as $key){
		$tmp['value1'] = $key;
		$tmp['province_name'] = $key;
		
		$data1[] = $tmp;
	}
	$smarty->assign("province_type",$data1);
	//end province
	//show proname
	foreach($prename_type as $key){
		$tmp['value2'] = $key;
		$tmp['prename_name'] = $key;
		
		$data2[] = $tmp;
	}
	$smarty->assign("prename_type",$data2);
	//endprename
	

  	//$smarty->assign("data",$data);
	$smarty->assign("title_web",$title_website);
	$smarty->assign("docs_path",$DirectoryURL);
	#Êèǹ¢Í§¡Òà display
	$smarty->display("student-add.tpl");
	
?>