Php从数据库里读出数据，并生成xml文件

<?php
/*php 生成xml文件*/
//数据库连接
$conn = mysql_connect('localhost','root','adminadmin');
mysql_select_db('bjgmzj');
mysql_query('set names "gb2312"');
//创建文件夹目录
$dir = dirname(__FILE__);
$dir = $dir.'\\'.date('Y-m-d');
if(!file_exists($dir))
{
mkdir($dir,0777);
}
//查询前10条
//$data = array();
$filename='article.xml';
$sql = "select * from king__article order by kid desc limit 10 ";
$query = mysql_query($sql);
$line = array();
while($row= mysql_fetch_array($query))
{

$line[]=$row;
}
$xml ='';
$xml="<?xml version='1.0' encoding='utf-8'?>\n";
$xml.="<books>\n";
foreach($line as $k=>$v)
{ echo '<pre>';
print_r($line);
echo '------';
echo $v;
$xml.='<ktitle>'.$line[$k]['ktitle']."</ktitle>\n";
$xml.='<kpath>'.$line[$k]['kpath']."</kpath>\n";

}
$xml.="</books>\n";
file_put_contents($dir.'\\'.$filename,$xml);

//$xml.=$aa;
//print_r($xml);

echo '生成成功';

?>