Please help me for this for loop, explode code...

I want a result of this script is
$link=http://yahoo.com

but in this if i use
$file=$_GET['file'];
then it is not working
but if i use directly
$file="yahoo1";

then i working ok
so what will be problem...

 
$type=2;
 $tlink=1;
 $aurl="http://yahoo.com|clickhere|yahoo1";

/*and get word is yahoo1*/


if(isset($_GET['file']))
{

            $file=$_GET['file'];



            if ($type==2) {
             $file_url = explode("@", $aurl, $tlink);

             for($i = 0; $i < count($file_url);  $i ++)
                  {

                 $fileurl[$i]= $file_url[$i];
                 $url = explode("|", $fileurl[$i]);


                 if($url[2]==$file){
                   $link=$url[0];}
                 }
                 }



}
echo" $link";

PHP:

 

I have no idea what you're trying to do with this code, but if it doesn't work with $file=$_GET['file'] and it does work with $file="yahoo1" then I'd say that $_GET['file'] doesn't contain "yahoo1"

 

No $_GET['file'] contain yahoo1 i checked by $f=$_GET['file'] and then i make echo"$f"; and then it display yahoo1 .

actually i m doing it for hide a my download link.