controller.php

<?php
/**
 * Created by PhpStorm.
 * User: Nemanja
 * Date: 26.2.2017
 * Time: 11:23
 */

/*
 * Including library
 * Note: You will use autoload
 */
include('library/GrammCase.php');

session_start();
/*
 * Default prepared array
 */
$results = [];

/*
 * List of names for testing
 */
$names = [
    'Nemanja',
    'Marko',
    'Djordje',
    'Dragoslav',
    'Zoran',
    'Miodrag',
    'Novak',
    'Petar',
    'Petra',
    'Nikola',
    'Igor',
    'Vladislav',
    'Neven',
    'Nevena',
    'Ignjat',
    'Zlatomir',
    'Buda',
];

/*
 * Catch POST and store in SESSION global variable
 */
if(isset($_POST['add'])){
    $word = $_POST['word'];

    $_SESSION[$word] = $word;
}

/*
 * Merge saved names with default names array
 */
$names = array_merge($names, $_SESSION);


/*
 * Prepare array for view
 */
foreach ($names as $key => $name) {
    $grammCase = new GrammCase($name);

    $wordGenitive     = $grammCase->genitive();
    $wordDative       = $grammCase->dative();
    $wordAccusative   = $grammCase->accusative();
    $wordVocative     = $grammCase->vocative();
    $wordInstrumental = $grammCase->instrumental();
    $wordLocative     = $grammCase->locative();

    $results[$key]['nominative']   = $name;
    $results[$key]['genitive']     = $wordGenitive;
    $results[$key]['dative']       = $wordDative;
    $results[$key]['accusative']   = $wordAccusative;
    $results[$key]['vocative']     = $wordVocative;
    $results[$key]['instrumental'] = $wordInstrumental;
    $results[$key]['locative']     = $wordLocative;
}