Вставка leech в шаблон

<?php
function reset_url($url) {
    $value = str_replace ( "http://", "", $url );
    $value = str_replace ( "www.", "", $value );
    $value = explode ( "/", $value );
    $value = reset ( $value );
    return $value;
}
$url = @rawurldecode ( $_GET['url'] );
$url = @str_replace ( "&amp;", "&", $url );

$_SERVER['HTTP_REFERER'] = reset_url ( $_SERVER['HTTP_REFERER'] );
$_SERVER['HTTP_HOST'] = reset_url ( $_SERVER['HTTP_HOST'] );

if (($_SERVER['HTTP_HOST'] != $_SERVER['HTTP_REFERER']) or $url == "") {
    @header ( 'Location: /index.php' );
    die ( "Access denied!!!<br /><br />Please visit <a href=\"/index.php\">{$_SERVER['HTTP_HOST']}</a>" );
}
@header ( 'Location: ' . $url );
die ( "Link Redirect:<br /><br />Please click <a href=\"{$url}\">here.</a>" );
?>

[xfgiven_link] [url=/engine/xgo.php?url=[xfvalue_link]]Скачать книгу "{title}"[/url][/xfgiven_link]