ช่วยด้วยครับผม ผมสั่ง Print ผ่าน PHP Printer Function ปริ้นแบบออโต้ผ่านหมดแล้ว แต่ภาษาไทยไม่ออกเลยครับ

<?php
require_once("../config/connect.php");
echo $_GET[id];

$sql = "SELECT * FROM tbl_order o 
LEFT JOIN tbl_table tl ON o.tblID = tl.tblID
WHERE o.randCode='$_GET[id]' ";
$query = mysql_query($sql);
$rs = mysql_fetch_array($query);

$strSQL = "SELECT * FROM tbl_order o 
LEFT JOIN tbl_order_list ol ON o.orderID =  ol.orderID
LEFT JOIN tbl_product p ON p.proID =  ol.proID
LEFT JOIN tbl_cupsize s ON s.sizeID =  ol.sizeID
LEFT JOIN tbl_coffeequality q ON q.quaID =  ol.quaID
LEFT JOIN tbl_pdstyle pd ON pd.styleID =  ol.styleID
LEFT JOIN tbl_coffeelevel clv ON clv.cLvID =  ol.cLvID
LEFT JOIN tbl_sugarlevel slv ON slv.sLvID =  ol.sLvID
WHERE o.orderID='$rs[orderID]' ";

$strQuery = mysql_query($strSQL);
$text = utf8_encode("CoffeeHol Receipt : $rs[orderID]") ;
$text = utf8_decode($text) ;
$handle = printer_open("Receipt");
printer_start_doc($handle, "ID_Work-$rs[orderID]");
printer_start_page($handle);
$font = printer_create_font("Arial", 20, 15, PRINTER_FW_MEDIUM, false, false, false, 0);
printer_select_font($handle, $font);
printer_draw_text($handle, $text, 0, 0);
printer_delete_font($font);
$font = printer_create_font("Arial", 17, 12, PRINTER_FW_THIN, false, false, false, 0);
printer_select_font($handle, $font);
printer_draw_text($handle, "-------------------------------------", 0, 25);
$i = 1 ;
$j = 50;
while($objArray = mysql_fetch_array($strQuery)){
	//echo "ชื่อ $objArray[proName]  : จำนวน $objArray[listUnit] ราคา $objArray[costTotal]";<br>
	printer_draw_text($handle, "$i.$objArray[proName]", 0, $j);
	$j = $j+25;
	printer_draw_text($handle, "Quantity = $objArray[listUnit] : Price $objArray[costTotal] Baht", 25, $j);
	$i++ ;
	$j = $j+25;
	$totalP = floatval($objArray[paid])-floatval($objArray[cchange]);
	$paid = $objArray[paid] ;
	$cchange = $objArray[cchange] ;
	$tableName = $objArray[tblName] ;
}
printer_draw_text($handle, "-------------------------------------", 0, $j);
$j = $j+25;
printer_delete_font($font);

$font = printer_create_font("Arial", 20, 15, PRINTER_FW_MEDIUM, false, false, false, 0);
printer_select_font($handle, $font);
//$totalP = floatval($objArray[paid])-floatval($objArray[cchange]);

$totalP = number_format($totalP,2,".",",");
$paid = number_format($paid,2,".",",");
$cchange = number_format($cchange,2,".",",");

printer_draw_text($handle, "-------- Calculate ---------", 0, $j);
$j = $j+50;
printer_draw_text($handle,"Total Price : $totalP", 0, $j);
$j = $j+25;
printer_draw_text($handle,"Cost Paid : $paid", 0, $j);
$j = $j+25;
printer_draw_text($handle,"Cost Change : $cchange", 0, $j);
$j = $j+50;
printer_draw_text($handle, "------- Customer Info --------", 0, $j);
$j = $j+50;
printer_draw_text($handle, "Table : $rs[tblName]", 0, $j);
$j = $j+25;
printer_draw_text($handle, "Member : General", 0, $j);
$j = $j+25;
printer_draw_text($handle, "Order Date  :  $rs[orderDate]", 0, $j);
$j = $j+50;
printer_draw_text($handle, "-------- Thank You ---------", 0, $j);
$j = $j+50;
printer_draw_text($handle, " ", 0, $j);
printer_delete_font($font);

printer_end_page($handle);
printer_end_doc($handle);
printer_close($handle);
/*
echo $text = utf8_encode(" CoffeeHol Receipt : $_GET[id]") ;
echo $text = utf8_decode($text) ;
//echo $text = " Test ไทย" ;
$handle = printer_open("Receipt");
printer_start_doc($handle, "My Document");
printer_start_page($handle);
$font = printer_create_font("Arial", 20, 15, PRINTER_FW_MEDIUM, false, false, false, 0);
printer_select_font($handle, $font);
//printer_write($handle, "เทสไทย");  
printer_draw_text($handle, $text, 0, 0);
printer_delete_font($font);
printer_end_page($handle);
printer_end_doc($handle);
printer_close($handle);
?>
<?php 
/*
$handle = printer_open("POS58"); 
printer_write($handle, "Text to print");
printer_write($handle, "เทสไทย");  
*/
?>