function he_wall_delete_user($user_id)
{
    if ($user_id == false) {
        return false;
    }
    $sql = he_database::placeholder('DELETE FROM `se_he_wall_comment` WHERE `author_id`=?', $user_id);
    he_database::query($sql);
    $sql = he_database::placeholder('DELETE FROM `se_he_hidden_action` WHERE `user_id`=?', $user_id);
    he_database::query($sql);
    $sql = he_database::placeholder('DELETE FROM `se_he_wall_like` WHERE `user_id`=?', $user_id);
    he_database::query($sql);
    he_wall::delete_user_uploads($user_id);
}