gymrooster_php/templates/dashboard.html.php

<?php require __DIR__ . '/../php/dashboard.php' ?>
Welkom <?=$docent['naam']?>
<h1>Gymrooster voor <?=date("D d M Y", strtotime($date))?></h1>
<a href="/dashboard?date=<?=date("Y-m-d", strtotime("-1 day", strtotime($date)))?>">Dag eerder</a>
<a href="/dashboard?date=<?=date("Y-m-d", strtotime("+1 day", strtotime($date)))?>">Dag later</a>

<form action="update?date=<?=$date?>&docent=<?=$docent['id']?>" method="post">
  <textarea name="opmerking" placeholder="Opmerkingen"><?=$rooster['opmerking']?></textarea><br>
  <select name="locatie">
  <?php if ($rooster['locatie'] === "1"): ?>
    <option value="1">Binnen</option>
    <option value="2">Buiten</option>
  <?php else: ?>
    <option value="2">Buiten</option>
    <option value="1">Binnen</option>
  <?php endif; ?>
  </select><br>
  <input type="submit" value="Verzenden">
</form>