ใครรู้บ้าง json_encode เชื่อมต่อกับฐานข้อมูล แล้วสามารถแสดงเป็นภาษาไทยได้

<?
$a = mssql_connect("localhost\sa", "sa", "smice");
$b = mssql_select_db("dbnew");
$sign = trim($_POST['sign']);
$c = "select distinct Register, Brand, Model from cars where Chassis_ID='".$sign."'";
$d = mssql_query($c);
$e = mssql_num_fields($d);
$f = array();
while ($g = mssql_fetch_array($d)) {
$h = array();
for ($i=0; $i<$e; $i++) {
$h[mssql_field_name($d, $i)] = $g[$i];
}
array_push($f, $h);
}
mssql_close($a);echo json_encode($f);
?>

<?
$a = mssql_connect("localhost\sa", "sa", "smice");
$b = mssql_select_db("dbnew");
$sign = trim($_POST['sign']);
$c = "select distinct Register, Brand, Model from cars where Chassis_ID='".$sign."'";
mysql_query("SET NAMES utf8");
$d = mssql_query($c);
$e = mssql_num_fields($d);
$f = array();
while ($g = mssql_fetch_array($d)) {
$h = array();
for ($i=0; $i<$e; $i++) {
$h[mssql_field_name($d, $i)] = $g[$i];
}
array_push($f, $h);
}
mssql_close($a);echo json_encode($f);
?>

$a = mssql_connect("localhost\sa", "sa", "smice");
$b = mssql_select_db("dbnew");
$sign = trim($_POST['sign']);
$c = "select distinct Register, Brand, Model from cars where Chassis_ID='".$sign."'";
mysql_query("SET NAMES utf8");
$d = mssql_query($c);
$e = mssql_num_fields($d);
$f = array();
while ($g = mssql_fetch_array($d)) {
$h = array();
for ($i=0; $i<$e; $i++) {
$h[mssql_field_name($d, $i)] = $g[$i];
}
array_push($f, $h);
}
mssql_close($a);
print_r($f);
echo "<br /><br />";
echo json_encode($f);

function mat ($matches) {
	return mb_convert_encoding(pack('H*',$matches[1]),'UTF-8','UTF-16');
}
function raw_json_encode($input) {
 	return preg_replace_callback( '/\\\\u([0-9a-zA-Z]{4})/', mat , json_encode($input) );
}
echo raw_json_encode( $f );

$a = mssql_connect("localhost\sa", "sa", "smice");
$b = mssql_select_db("dbnew");
$sign = trim($_POST['sign']);
$c = "select distinct Register, Brand, Model from cars where Chassis_ID='".$sign."'";
mysql_query("SET NAMES utf8");
$d = mssql_query($c);
$e = mssql_num_fields($d);
$f = array();
while ($g = mssql_fetch_array($d)) {
$h = array();
for ($i=0; $i<$e; $i++) {
$h[mssql_field_name($d, $i)] = $g[$i];
}
array_push($f, $h);
}
mssql_close($a);
print_r($f);
echo "<br /><br />";
echo json_encode($f);
echo "<br /><br />";
function mat ($matches) {
	return mb_convert_encoding(pack('H*',$matches[1]),'UTF-8','UTF-16');
}
function raw_json_encode($input) {
 	return preg_replace_callback( '/\\\\u([0-9a-zA-Z]{4})/', mat , json_encode($input) );
}
echo raw_json_encode( $f );

header("Content-type:text/xml");
echo '<?xml version="1.0" encoding="windows-874"?>';
$conn = mssql_connect("localhost\sa", "sa", "smice");
mssql_select_db("dbnew");
$cha4 = "11011";
$cha1 =  "select distinct Chassis_ID, Register, Brand, Model from cars where Chassis_ID='".$cha4."' order by Register asc";
$cha2 = mssql_query($cha1);
echo "<data>";
while ($cha3 = mssql_fetch_array($cha2)) {
echo "<user>";
echo "<Chassis_ID>".trim($cha3['Chassis_ID'])."</Chassis_ID>";
echo "<Register>".trim($cha3['Register'])."</Register>";
echo "<Brand>".trim($cha3['Brand'])."</Brand>";
echo "<Model>".trim($cha3['Model'])."</Model>";
echo "</user>";
}
echo "</data>";