Change admin bar to default:off

Question

While I quite like the admin bar I actually want it to be OFF by default instead of ON ( I don't want to disable it altogether because I want users to be able to turn it on if they want - but but I don't want to have to manually turn it off for every user ) Is there a way to implement this.

Answer 1

add_action("user_register", "set_user_admin_bar_false_by_default", 10, 1);
function set_user_admin_bar_false_by_default($user_id) {
    update_user_meta( $user_id, 'show_admin_bar_front', 'false' );
    update_user_meta( $user_id, 'show_admin_bar_admin', 'false' );
}

Place in theme functions file or you can make into a plugin.

Once user registers it will go and set the users admin bar prefs to false. The user can then, once logged in, set this to true.

Answer 2

function wpse29210_admin_bar_toogle()
{
    add_filter( 'show_admin_bar', '__return_false' );

    $user = get_userdata( $GLOBALS['current_user'] )->data->ID;

    if ( ! is_admin() && $user->show_admin_bar_front )
        add_filter( 'show_admin_bar', '__return_true' );

    if ( is_admin() && $user->show_admin_bar_admin )
        add_filter( 'show_admin_bar', '__return_true' );

    return;
}
add_action( 'init', 'wpse29210_admin_bar_toogle' );