Licznik dni do wydarzenia

{
  "events": [
    {
      "id": 1,
      "name": "Egzamin INF.03",
      "date": "2026-06-15",
      "category": "nauka",
      "created_at": "2026-02-13 10:30:00"
    },
    {
      "id": 2,
      "name": "Wakacje",
      "date": "2026-06-28",
      "category": "osobiste",
      "created_at": "2026-02-13 10:35:00"
    },
    {
      "id": 3,
      "name": "Urodziny mamy",
      "date": "2026-03-20",
      "category": "rodzina",
      "created_at": "2026-02-13 10:40:00"
    }
  ]
}

<?php
$eventDate = new DateTime('2026-06-15');
$today = new DateTime('today');

$diff = $today->diff($eventDate);
$days = (int)$diff->format('%r%a'); // %r daje znak + lub -

if ($days > 0) {
    echo "Za $days dni";
} elseif ($days < 0) {
    echo "Minęło " . abs($days) . " dni temu";
} else {
    echo "Dzisiaj!";
}
?>

<?php
$date = $_POST['date'] ?? '';
$eventDate = DateTime::createFromFormat('Y-m-d', $date);

if (!$eventDate) {
    $errors[] = 'Nieprawidłowy format daty';
} elseif ($eventDate < new DateTime('today')) {
    $errors[] = 'Data nie może być z przeszłości';
}
?>

<?php
$events = json_decode(file_get_contents('events.json'), true)['events'];

usort($events, function($a, $b) {
    return strtotime($a['date']) - strtotime($b['date']);
});
?>

<?php
function getUrgencyClass($days) {
    if ($days < 0) return 'past';      // szary
    if ($days <= 7) return 'urgent';   // czerwony
    if ($days <= 30) return 'soon';    // żółty
    return 'normal';                    // zielony
}
?>
<style>
.past { color: #888; text-decoration: line-through; }
.urgent { color: #dc3545; font-weight: bold; }
.soon { color: #ffc107; }
.normal { color: #28a745; }
</style>