هل يوجد طريقة لإضافة canonical لصفحات المنتدى

<?php
if (isset($PowerBB->_SERVER['HTTPS']) &&
($PowerBB->_SERVER['HTTPS'] == 'on' || $PowerBB->_SERVER['HTTPS'] == 1) ||
isset($PowerBB->_SERVER['HTTP_X_FORWARDED_PROTO']) &&
$PowerBB->_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') {
$protocol = 'https://';
}
else {
$protocol = 'http://';
}
$url=$protocol.$PowerBB->_SERVER['HTTP_HOST'].$PowerBB->_SERVER['REQUEST_URI'];
?>
<link rel="alternate" hreflang="ar" href="<?php echo $url; ?>" />
<link rel="canonical" href="<?php echo $url; ?>" />

RewriteEngine On
RewriteCond %{HTTPS} !=on  [OR]
RewriteCond %{HTTP_HOST} ^www\. [NC]
RewriteCond %{HTTP_HOST} ^(?:www\.)?(.+)$ [NC]
RewriteRule ^ https://%1%{REQUEST_URI} [L,NE,R=301]