Scorrere righe con SimpleXML

[osiryx]

<?xml version="1.0" encoding="utf-8"?>
<images>
<image id="0">
<photo>1.png</photo>
<caption>001</caption>
<tipo>1</tipo>
</image>
<image id="1">
<photo>2.png</photo>
<caption>002</caption>
<tipo>1</tipo>
</image>
<image id="2">
<photo>3.png</photo>
<caption>003</caption>
<tipo>1</tipo>
</image>
<image id="3">
<photo>4.png</photo>
<caption>002</caption>
<tipo>1</tipo>
</image>
<image id="4">
<photo>5.png</photo>
<caption>002</caption>
<tipo>1</tipo>
</image>
</images>

<?php 
$id = $_GET['id'];
    $i = $id;
    $next = $i+1;
    $prev = $i-1;
    
$xml = simplexml_load_file('image.xml');
$totale=count($xml->image); 
foreach ($xml->image as $image) {
    $id = $image {'id'} ;
    if ($i == $id) {
        $photo = $image->photo;
        echo "photo: ".$photo."
";
    }
}
?>
[url="player.php?id=<?php echo $prev; ?>"]indietro[/url]
[url="player.php?id=<?php echo $next; ?>"]avanti[/url]

Così funziona ma penso che si possa fare anche di meglio