PHP to XML Playlist with selective database column values

[shellou]

When somebody click on link on page, he will go to this url..click url: http://sitename.com/test.php?id=254&req=1,4,7,i want that a xml file is created with data of id (254) and values of column no 1,4,7 of database only.I.e. only link No: 1, Link No: 4, Link No:7, of database collected.Thanks in advace is anyone help me solve this issue...\[code\]$fid = $_GET['id'];include("../conf.php");mysql_connect($db_host,$db_user,$db_pass) or die(mysql_error()); mysql_select_db($db_name) or die(mysql_error());$result = mysql_query("SELECT * FROM data WHERE id LIKE '$fid'");while($r=mysql_fetch_array($result)){$id=$r["id"];$link1=$r["link1"];$link2=$r["link2"];$link3=$r["link3"];$link4=$r["link4"];$link5=$r["link5"];$link6=$r["link6"];$link7=$r["link7"];}$st_val = $_GET['req'];$store_del_exp = explode("," ,$st_val);//echo $store_del_exp;$store_del_exp_count=count($store_del_exp);foreach ($store_del_exp as $i){echo " $link$i ";}\[/code\]