header("Content-Type: application/xml; charset=utf-8");

echo '<?xml version="1.0" encoding="UTF-8"?>';
echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">';

// HOME
echo '<url>
<loc>'.$SITE_URL.'</loc>
<changefreq>daily</changefreq>
<priority>1.0</priority>
</url>';

// CATEGORIES
$res = mysqli_query($conn, "SELECT slug FROM categories WHERE status='active'");
while($row = mysqli_fetch_assoc($res)){
    echo '<url>
    <loc>'.$SITE_URL.$row['slug'].'</loc>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
    </url>';
}

echo '</urlset>';