iOS การบันทึกภาษาไทยลงไปใน MySQL แล้วมันเป็นเครื่องหมาย ????

mysql_query("SET NAMES UTF8");

<?
	include('config.inc.php');
	mysql_db_query("SET NAMES UTF8");
	

	$strUsername = $_POST["sUsername"];
	$strtopicID = $_POST["stopicID"];
	$strtopicName = $_POST["stopicName"];
	$strtopicDate = $_POST["stopicDate"];
	

	/*** Insert ***/
	$strSQL = "INSERT INTO topic (topicID,topicName,topicDate,Username) 
		VALUES (
			'".$strtopicID."',
			'".$strtopicName."',
			'".$strtopicDate."',
			'".$strUsername."'
			)
		";

	$objQuery = mysql_db_query($dbname,$strSQL);
	if(!$objQuery)
	{
		//$arr["Status"] = "0";
		//$arr["Message"] = "Cannot Save Data!";
		
		//echo json_encode($arr);
		exit();
	}
	else
	{
		//$arr["Status"] = "1";
		//$arr["Message"] = "Register Successfully!";

		//echo json_encode($arr);
		//exit();
	}

	
	$strSQL = "SELECT `topicID`  FROM topic  WHERE `Username` = '".$strUsername."' ORDER BY `topicID` DESC LIMIT 0,1";
	$objQuery = mysql_db_query($dbname,$strSQL);
	$objResult = mysql_fetch_array($objQuery);
	if($objResult)
	{
		$arr["Status"] = "1";
		$arr["topicID"] = $objResult["topicID"];
		$arr["Message"] = "Insert Successfully!";
		
		echo json_encode($arr);
		exit();
	}
	else
	{
		$arr["Status"] = "0";
		$arr["Message"] = $strSQL;

		echo json_encode($arr);
		exit();
	}

	
	
	mysql_close();
	
?>