$_SESSION แสดงภาษาไทยเป็นแบบนี้ครับ ?????????? แก้ไงหรอครับ

<?php
session_start();
if($_SESSION['Class'] == "")
	{
		header("location:loginisp.php");
	}

if($_SESSION['Class'] != "ผ่านการอนุมัติ")
	{
		header("location:loginisp.php");
	}	
?>

<?php
	session_start();
	mysql_connect("localhost","root","");
	mysql_select_db("decc");
	mysql_query("set name UTF8");
	$strSQL = "SELECT * FROM tblmember WHERE Email = '".mysql_real_escape_string($_POST['Email'])."' 
	and Passwd = '".mysql_real_escape_string($_POST['Passwd'])."'";
	$objQuery = mysql_query($strSQL);
	$objResult = mysql_fetch_array($objQuery);
	if(!$objResult)
	{
			echo "Email and Password Incorrect!";
	}
	else
	{
			$_SESSION["CODE_ISP"] = $objResult["CODE_ISP"];
			$_SESSION["Status"] = $objResult["Status"];
			$_SESSION["Class"] = $objResult["Class"];

			session_write_close();
			
			if($objResult["Status"] == "ISP")
			{
				header("location:profile_isp.php");
			}
	}
	mysql_close();
?>

if($_SESSION['Class'] == "")
	{
		header("location:loginisp.php");
	}

if($_SESSION['Class'] != "1")
	{
		header("location:loginisp.php");
	}	

function classNames($aaa)
	{
		switch ($aaa)
		{
			case '0' :
				$aaa="ไม่อนุมัติ";
				break;
			case '1' :
				$aaa="อนุมัติ";
				break;
			default :
				$aaa="ไม่อนุมัติ";
				break;
		}
		return $aaa;
	}

echo classNames($_SESSION['Class']);

session_start();
$_SESSION['testthai']=base64_encode('ทดสอบภาษาไทย');
////////////////////////////////////////////////////////////////////////////////////
if( 'ทดสอบภาษาไทย'===base64_decode($_SESSION['testthai'])){
   echo 'TRUE';
}else{
   echo 'FALSE';
}