A quick way to redirect logged off users of wordpress, when in site development. used it to redirect to a static webpage, on the same server but only a landing page for informing that is in construction

redirect_logged_off_users.php

<?php
/* send logged off users to maintenance - comment to disable*/
/* sometimes reg users sessions expire, need to comment temporarily*/
function maintenance_redirect(){
    if( !is_user_logged_in() ){
        wp_redirect( site_url( 'em-construcao.html' ), 302 );
        exit();
    }
}
add_action( 'init', 'maintenance_redirect' );
?>