Ciao,
come posso modificare il seguente script affinchè sia l'utente a decidere da quale sito leggere i feed, semplicemente inserendo il link del file xml desiderato?

Codice PHP:
<?php
//set_time_limit(0);

//set your RSS link here !!
$file = "http://www.eurosport.fr/z/tennis/rss.xml";

$rss_channel = array();
$currently_writing = "";
$main = "";
$item_counter = 0;
// setup variable you want to display
function startElement($parser, $name, $attrs) {
    global $rss_channel, $currently_writing, $main;
    switch($name) {
        case "RSS":
        case "RDF:RDF":
        case "ITEMS":
            $currently_writing = "";
             break;
        case "CHANNEL":
             $main = "CHANNEL";
             break;
        case "IMAGE":
             $main = "IMAGE";
             $rss_channel["IMAGE"] = array();
             break;
        case "ITEM":
             $main = "ITEMS";
             break;
        default:
             $currently_writing = $name;
             break;
    }
}

function endElement($parser, $name) {
       global $rss_channel, $currently_writing, $item_counter;
       $currently_writing = "";
       if ($name == "ITEM") {
           $item_counter++;
       }
}


                    
function characterData($parser, $data) {
    global $rss_channel, $currently_writing, $main, $item_counter;
    
    $trashArray = array("é", "è", "Ã", "Â", "ô", "à§", "àª", "à¢", "à¹");
    $rightArray = array("é", "è", "à", "", "ô", "ç", "ê", "â", "ù");

    for($jer=0;$jer<sizeof($rightArray);$jer++)
    { $data = str_replace($trashArray[$jer], $rightArray[$jer], $data); }
    
    if ($currently_writing != "") {
        switch($main) {
            case "CHANNEL":
                if (isset($rss_channel[$currently_writing])) {
                    $rss_channel[$currently_writing] .= $data;
                } else {
                    $rss_channel[$currently_writing] = $data;
                }
                break;
            case "IMAGE":
                if (isset($rss_channel[$main][$currently_writing])) {
                    $rss_channel[$main][$currently_writing] .= $data;
                } else {
                    $rss_channel[$main][$currently_writing] = $data;
                }
                break;
            case "ITEMS":
                if (isset($rss_channel[$main][$item_counter][$currently_writing])) {
                    $rss_channel[$main][$item_counter][$currently_writing] .= $data;
                } else {
                    //print ("rss_channel[$main][$item_counter][$currently_writing] = $data
");
                    $rss_channel[$main][$item_counter][$currently_writing] = $data;
                }
                break;
        }
    }
}

$xml_parser = xml_parser_create();
xml_set_element_handler($xml_parser, "startElement", "endElement");
xml_set_character_data_handler($xml_parser, "characterData");

if (!($fp = fopen($file, "r"))) {
    die("could not open XML input");
}

while ($data = fread($fp, 4096)) {
    if (!xml_parse($xml_parser, $data, feof($fp))) {
        die(sprintf("XML error: %s at line %d",
                    xml_error_string(xml_get_error_code($xml_parser)),
                    xml_get_current_line_number($xml_parser)));
    }
}
xml_parser_free($xml_parser);

?>
<html>

<head>

<title>PHP RSS Feed - 4wSearchSripts | We share personnal scripts database ! Software </title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<link rel="stylesheet" href="mm_training.css" type="text/css" />
</head>
<body>


<div style="height:100px; overflow:hidden;">
  <marquee behavior="scroll" direction="up" scrollamount="1" scrolldelay="1" onMouseOver="this.stop()" onMouseOut="this.start()" style="height:86px;width:100%;">
<span class="txtng_bleu"><u><?php echo $rss_channel["TITLE"]; ?></u></span>


<?php
if (isset($rss_channel["ITEMS"])) {
    if (count($rss_channel["ITEMS"]) > 0) { ?><table width="95%" border="0" align="center" cellpadding="4" cellspacing="0" class="txtn_noir"><?php
        //for($i = 0;$i < count($rss_channel["ITEMS"]);$i++) { 
        for($i = 0;$i<3;$i++) { 
            if($rss_channel["ITEMS"][$i]["CATEGORY"]=="Tennis") {
            $combo =  explode("
", html_entity_decode($rss_channel["ITEMS"][$i]["DESCRIPTION"])); 
            $imageArray = explode('"', $combo[0]); 
            ?>            
<tr>
            <td align="left">[url="<?php echo $rss_channel["]" target="_blank"><?php echo $rss_channel["ITEMS"][$i]["TITLE"]; ?>[/url]
              <?php 
            ?></td>
            <td align="left">[img]<?php echo $imageArray[1]; ?>[/img]</td>
            </tr>
            <tr>
              <td colspan="2" align="left"><?php echo $combo[1]; ?></td>
            </tr>
            
            
       <?php }  }?></table>


<?php
    } else {
        ?><b class="txtng_bleu">Aucun article dans ce flux rss.[/b]<?php
    }
}
?></marquee></div>
</body>
</html>

Grazie