Implementing a mobile money USSD menu with branded SMS app

index.php

<?php
$menu = new Menu();
    if($text == "" && $isUserRegistered == true){
         //user is registered and string is is empty
        echo "CON " . $menu->mainMenuRegistered("<Add a name here>");
    }else if($text == "" && $isUserRegistered== false){
         //user is unregistered and string is is empty
         $menu->mainMenuUnRegistered();
    }else if($isUserRegistered== false){
        //user is unregistered and string is not empty
        $textArray = explode("*", $text);
        switch($textArray[0]){
            case 1: 
                $menu->registerMenu($textArray, $phoneNumber);
            break;
            default:
                echo "END Invalid choice. Please try again";
        }
    }else{
        //user is registered and string is not empty
        $textArray = explode("*", $text);
        switch($textArray[0]){
            case 1: 
                $menu->sendMoneyMenu($textArray,$sessionId);
            break;
            case 2: 
                $menu->withdrawMoneyMenu($textArray);
            break;
            case 3:
                $menu->checkBalanceMenu($textArray);
                break;
            default:
                echo "END Inavalid menu\n";
        }
    }
?>