Custom XML from Wordpress Gallery to Flash

<?php
/*
 * Custom XML file to be read by Flash SWF
 * Install : wp-content/gallery.xml.php
 * Description : Grabs two custom fields from post 101 and generates a configuration XML file
 * Dependencies : must adjust wp-load.php path in case this file is not inside wp-content/
 * Usage : within Flash, call this XML generator and assign the correct POST_ID: "http://yourdomain.com/wp-content/gallery.xml.php?id=POST_ID"
 * Observations: pay attention to the use of single and double quotes within the $xml variable
 */

require_once "../wp-load.php";
$id = intval($_GET['id']);

function GetGallery($idi){
    $idi = intval($idi);
    $img = array();
    $results = get_children( array(
        'post_parent' => $idi,
        'post_status' => 'inherit',
        'post_type' => 'attachment',
        'post_mime_type' => 'image',
        'order' => 'ASC',
        'orderby' => 'menu_order') );
    foreach ( $results as $imagem )
    {
        $pic=wp_get_attachment_image_src( $imagem->ID, 'medium' );
        $title = $imagem->post_title;
        $txt = $imagem->post_content;
        $img[] = array('href' => $pic[0], 'title' => $title, 'txt' => $txt);
    }
    return $img;
}

$GAL = GetGallery($id);

$xml = '<?xml version="1.0" encoding="UTF-8"?>' . "\n\n";
$xml .= '<gallery>' . "\n\n";

$xml .= '<options>' . "\n\n";
$xml .= '    <name>ONE OF MANY</name>' . "\n\n";
$xml .= '</options>' . "\n\n";

$xml .= '<pictures>' . "\n\n";
foreach($GAL as $jpg) {
    $xml .= '    <pic>' . "\n";
    $xml .= '        <bigimage>' . $jpg['href'] . '</bigimage>' ."\n";
    $xml .= '        <info title="'. $jpg['title'] .'" desc="'. $jpg['txt'] .'" />' . "\n";
    $xml .= '    </pic>' . "\n\n";
}
$xml .= '</pictures>' . "\n\n";
$xml .= '</gallery>';

echo $xml;
?>