function verifyLogin()
{
    $email = $_POST["email"];
    $password = $_POST["password"];
    $checked = $_POST["remember"];
    // Check the info in the database
    $result = loginAction($email, $password);
    if ($result["statusTxt"] == "SUCCESS") {
        // Starting the session
        session_start();
        $_SESSION["email"] = $email;
        $_SESSION["fName"] = $result["data"]["fName"];
        $_SESSION["lName"] = $result["data"]["lName"];
        // Setting the cookies
        if ($checked == "true") {
            setcookie("emailCookie", $email, time() + 3600 * 24 * 30);
            setcookie("passwordCookie", $password, time() + 3600 * 24 * 30);
        }
        // Retun data to the front-end
        $finalResponse = array("firstName" => $result["data"]["fName"], "lastName" => $result["data"]["lName"]);
        echo json_encode($finalResponse);
    } else {
        header('HTTP/1.1 406, User not found');
        die(json_encode($result));
    }
}
<?php

header('Content-type: application/json');
require_once __DIR__ . '/dataLayer.php';
$action = $_POST['action'];
switch ($action) {
    case 'LOGIN':
        loginAction();
        break;
    case 'COOKIES':
        verifyCookies();
        break;
    case 'REGISTER':
        registerAction();
        break;
    case 'FRIENDS':
        getFriends();
        break;
    case 'ADDFRIEND':
        addFriend();
        break;
    case 'USERS':
        getUsers();
        break;
    case 'PROFILE':
        getProfile();
        break;
    case 'ENDSESS':
        endSession();
        break;
    case 'SAVET':