php oop การ return ค่าจาก function มายัง หน้า form

--- itemList.php-----
include("DBConnect.php");
require("class_itemmaster.php");
$objItemList = new ItemList; 
$conn = new DBConnect; 
echo $objItemList->itemLoad();	// หรือ นำ code ใน class itemlist,function itemLoad มาไว้ที่นี่ดีคะ ???

----DBConnect.php-------

ob_start(); 
Class DBConnect
{
private $_host = "localhost"; 
private $_user = "root"; 
private $_pass = "1234"; 
private $_db = "test_db"; 


private function openDB()
{
$charset = "set names utf8";
$link = mysql_pconnect($this->_host, $this->_user, $this->_pass);
if (!$link) {
die('Could not connect to the server: ' . odbc_error());
}

$db_selected = mysql_select_db($this->_db, $link);
if (!$db_selected) {
die ('Could not connect to the database"' . $this->_db ." get error: " . mysql_error());
}

mysql_query($charset) or die('Invalid query: ' . mysql_error());

}

private function closeDB()
{
mysql_close($link);
}

public function return_sql($sql)
{
self::openDB();
$result = mysql_query($sql) or trigger_error("SQL", E_USER_ERROR);

if ($result){
$arrData = array();
while ($rows = mysql_fetch_array($result)) {
$arrData[] = $rows;
}



}else{ 
$message = 'This command of : ' . mysql_error() . " incorrect<BR />";

$message = mysql_error();
die($message);
} 

return $arrData;

self::closeDB();
}

public function exe($sql)
{
self::openDB();
$result = mysql_query($sql);
if (!$result) {
$message = 'This command of : ' . mysql_error() . "incorrect<BR />";
die($message);
}
}

}

?><?php ob_end_flush();?>

--------class_itemmaster.php-----

class ItemList {

public $itemcode;
public $itemname;
public $unittype;
public $status;
public $remark;
public $createby;
public $sql;

public function DuplicateItem ($fitemcode,$fitemname,$funittype,$fstatus,$fremark,$fcreateby) {

$this->itemcode=$fitemcode;
$this->itemname=$fitemname;
$this->unittype=$funittype;
$this->status=$fstatus;
$this->remark=$fremark;
$this->createby=$fcreateby;

$conn = new DBConnect; 
$sSql = "select * from itemmaster where itemcode ='$this->itemcode'";

$arrData = $conn->return_sql($sSql);

if ( $arrData=true)	{
return "<script>alert('Duplicate Data !');</script>"; 
} 
else { 

AddNewItem($this->itemcode,$this->itemname,$this->unittype,$this->status,$this->remark,$this->createby);
}

}

public function AddNewItem ($fitemcode,$fitemname,$funittype,$fstatus,$fremark,$fcreateby) {
$this->itemcode=$fitemcode;
$this->itemname=$fitemname;
$this->unittype=$funittype;
$this->status=$fstatus;
$this->remark=$fremark;
$this->createby=$fcreateby; 
$conn = new DBConnect; 
$sSql = "Insert into itemmaster (ItemCode,ItemName,Unit,Status,Remark,Createby) VALUES ('$this->itemcode','$this->itemname','$this->unittype','$this->status','$this->remark','$this->createby')";	
$arrData = $conn->exe($sSql);
return "<meta http-equiv='refresh'Content =0;URL='ItemList.php'>";


}

public function itemLoad () {
$conn = new DBConnect; 
$sSql = "SELECT * FROM itemmaster";
$arrData = $conn->return_sql($sSql);
return $arrData; // จากตรงนี้จะ return ค่าเป็น ไปยัง form ยังงัยดีคะ หรือว่า ต้องสร้าง html แทรกไว้ใน class ที่นี่ดีคะ ??

// ถ้าสร้างที่นี่ /*
echo "<table width=200 border=1>";
echo " <tr><td cellpadding= 0 cellspacing=3 bgcolor=#99CCFF align=center class=style274>ItemCode</td>
<td cellpadding= 0 cellspacing=3 bgcolor=#99CCFF align=center class=style274>ItemName</td>
<td cellpadding= 0 cellspacing=3 bgcolor=#99CCFF align=center class=style274>Unit</td></tr>";
$j=0;
foreach($arrData as $row){ {
echo "<tr><td cellpadding= 0 cellspacing=1 bgcolor=#99CCFF>"; echo $row['ItemCode']; echo"</td>";
echo "<td cellpadding= 0 width=100 cellspacing=1 bgcolor=#99CCFF >"; echo $row['ItemName']; echo"</td>";
echo "<td cellpadding= 0 width=250 cellspacing=1 bgcolor=#99CCFF >"; echo $row['Unit']; echo"</tr></td>";
echo "<br\n>";
}echo "</table>";*/

}

public function itemCodeSearch ($fitemcode) {
$this->itemcode=$fitemcode;
$conn = new connectDB;
$sSql = "SELECT * FROM itemmaster WHERE ItemCode ='$this->itemcode' ";
$arrData = $conn->return_sql($sSql);
return "<meta http-equiv='refresh'Content =0;URL='ItemList.php'>";
}



}
?>