返回json类型（例子）：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script src="../../jquery-1.11.2.min.js"></script>
</head>
<body>
<select id="nation">
</select>
<script type="text/javascript">
$.ajax({
url:"jsonchuli.php",
dataType:"JSON",
success: function(data){
var s="";
/*for(var i=0;i<data.length;i++)
{
str = str+"<option value='"+data[i].Code+"'>"+data[i].Name+"</option>";
}*/
for(var s in data)
{
str = str+"<option value='"+data[s].Code+"'>"+data[s].Name+"</option>";
}
$("#nation").html(str);
}
});
</script>
</body>
</html>
<?php
include("../DBDA.class.php");
$db = new DBDA();
$sql = "select * from nation";
//需要关联数组
//数组内容的编码格式：utf8的
echo json_encode($db->GuanQuery($sql));
返回xmL类型（例子）：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script src="jquery-1.11.2.min.js"></script>
</head>
<body>
<select id="sel">
</select>
<script type="text/javascript">
$.ajax({
url:"xmlchuli.php",
dataType:"XML",
success: function(data){
//alert($(data).find("code").eq(1).text());
alert($(data).find("nation").attr("bs"));
var allcode = $(data).find("code");
var allname = $(data).find("name");
var str ="";
for(var i=0;i<allcode.length;i++)
{
var code = allcode.eq(i).text();
var name = allname.eq(i).text();
str = str +"<option value='"+code+"'>"+name+"</option>";
}
$("#sel").html(str);
}
});
</script>
</body>
</html>
<?php
include("DBDA.class.php");
$db = new DBDA();
$sql = "select * from nation";
$attr = $db->Query($sql);
echo "<nation bs='1'>";
foreach($attr as $k=>$v)
{
echo "<n{$k}><code>{$v[0]}</code><name>{$v[1]}</name></n{$k}>";
}
echo "</nation>";