session(). 
.guest {
body {
background-color: green;
}
}
.user {
body {
background-color: yellow;
}
}<html class="<?= $isGuest ? 'guest' : 'user'; ?>">
...
</html>
...
add_filter( 'ul_ol_hook', 'ul_ol_func' );<?php echo apply_filters('ul_ol_hook', $tblock_textarea); ?>
