Description:
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the code is Ajax Country/Area Drop-down List Example but on oracle not on mysql , the code must appear the area or on my code subcategory drop down list in Arabic but it is appear as stars ,you make encode as windows 1256 and utf-8 and does not appear what the solution,if there is a solution for populate drop down list from another on oracle send to me,thanks for interest

Reproduce code:
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 <?php

    // This is a very simple data provider for the cascading dropdown
    // example. A *real* data provider would most likely connect to
    // a database, use xslt and implement some level of security.
    Header("Content-type: text/xml");
    // get query string params
	//$filter = $_GET['filter'];
    $filter  = 1;
	$xml = '';
    $iscountry = 1;
//   // build xml content for client JavaScript
    $conn = oci_connect("mohammadabed","0599397083","172.16.209.23:1521/XE") or die("couldnot conncet to database");

	$query = "SELECT * from DOC_categories where ID_PERANT_DOC_CATEGORIES = '$filter'";

    $stmt = oci_parse($conn ,$query);
    oci_execute($stmt);
    while ($row = oci_fetch_array ($stmt, OCI_BOTH))
    {
		if ($iscountry == 1)
		{
		$xml = $xml . '<continent name="' . $filter . '">';
		}
        $xml  = $xml . '<country id="' . $iscountry . '">' .   $row[1] . '</country>';
      // $xml= convert_uuencode($xml);
        //echo "the value is ".$row[1];
		$iscountry = $iscountry + 1;
	}
	$xml = $xml . '</continent>';

	if ($iscountry == 1)
	{
        $xml = $xml . '<continent name="none">';
        $xml = $xml . '<country id="0">no element found</country>';
        $xml = $xml . '</continent>';
	}
    // send xml to client
	echo ($xml);

    ?>



Expected result:
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the second drop down list appear in Arabic as in database

Actual result:
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the second drop down list appear in stars or asterisks not as in database