This will remove the field if the person has already made any comment on the current post.
add_filter('acf/prepare_field/name=YOUR_FIELS_NAME', 'remove_if_previous_comments');
function remove_if_previous_comments($field) {
if (!is_user_logged_in()) {
return $field;
}
global $post;
$user = get_current_user_id();
$args = array(
'author__in' => array($user),
'post_id' => $post->ID,
'count' => true
);
$count = get_comments($args);
if ($count) {
$field = false;
}
return $field;
}
unfortunately you cannot remove the field depending on if the comment is a reply to another comment or not. WP only has one comment form and it’s just moved around when replying to other comments.
