zbl72

OK – Thanks for your tips. I’ve googled a bit more and I’ve managed to display a more precise array structure using get_var and print_r against my $du. Finally my working function looks like this:

function data_urodzenia_function() {
    global $current_user;
	$user_id = get_current_user_id();
	$key = (string) '_lp_custom_register';
        $du_array = get_user_meta( $user_id, $key, true );
        $du = $du_array[5839468];
    return ($du);