Untitled

<?php
    require_once 'database.php';
    $campuses = getCampuses();
?>
<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <script src="functions.js"></script>
    </head>
    <body>
        <header></header>
        <nav></nav>
        <article>
            <h1>Adatbázis kezelés</h1>
            <section>
                <h2>PHP alapokon</h2>
                <form action="" method="POST">
                    <label for="campus_id">Telephely:</label>
                    <select name="campus_id" onchange="campusChange()">
                        <option value="">Válassz!</option>
                        <?php foreach ($campuses as $c) : ?>
                        <option value="<?=$c['id'] ?>">
                                <?=$c['name']?>
                        </option>
                        <?php endforeach; ?>
                    </select>

                    <?php if(array_key_exists('campus_id', $_POST)) : ?>
                    <label for="building_id">Épület:</label>
                    <select name="building_id">
                        <option value="">Válassz!</option>
                    </select>
                    <?php endif; ?>
                    <input type="submit" value="Tovább"/>
                </form>
            </section>
        </article>
        <footer></footer>
    </body>
</html>