LABORATORIUM 4: PHP — Dynamiczne strony

ZADANIA:

  1. Dodaj nowy produkt do tablicy $products
  2. Dodaj filtrowanie po cenie: ?max_price=1000
  3. Stwórz podstronę szczegółów: details.php?id=1
  4. Dodaj plik header.php i footer.php (include)
  5. Dodaj sortowanie: ?sort=price_asc lub ?sort=price_desc

```html 1, ‘name’ => ‘Laptop ThinkPad X1’, ‘price’ => 5499.99, ‘category’ => ‘elektronika’, ‘in_stock’ => 15], [‘id’ => 2, ‘name’ => ‘Monitor Dell 27” 4K’, ‘price’ => 1899.00, ‘category’ => ‘elektronika’, ‘in_stock’ => 8], [‘id’ => 3, ‘name’ => ‘Słuchawki Sony WH-1000XM5’, ‘price’ => 1499.00, ‘category’ => ‘audio’, ‘in_stock’ => 23], [‘id’ => 4, ‘name’ => ‘Klawiatura Keychron Q1’, ‘price’ => 849.00, ‘category’ => ‘peryferia’, ‘in_stock’ => 12], [‘id’ => 5, ‘name’ => ‘Myszka Logitech MX Master’, ‘price’ => 449.00, ‘category’ => ‘peryferia’, ‘in_stock’ => 30], [‘id’ => 6, ‘name’ => ‘Webcam Elgato Facecam’, ‘price’ => 699.00, ‘category’ => ‘peryferia’, ‘in_stock’ => 0], ];

// ─── FILTROWANIE po kategorii z URL ─── // Użytkownik wchodzi na: ?category=elektronika $selected_category = $_GET[‘category’] ?? ‘all’;

if ($selected_category !== ‘all’) { \(filtered = array_filter(\)products, function(\(p) use (\)selected_category) { return $p[‘category’] === $selected_category; }); } else { $filtered = $products; }

// ─── WYCIĄGNIJ unikalne kategorie (do filtrów) ─── \(categories = array_unique(array_column(\)products, ‘category’));

// ─── OBLICZENIA ─── \(total_products = count(\)products); \(total_value = array_sum(array_column(\)products, ‘price’)); \(out_of_stock = count(array_filter(\)products, fn($p) => $p[‘in_stock’] === 0));

// ─── DYNAMICZNE POWITANIE ─── \(hour = (int) date('H'); if (\)hour < 12) { \(greeting = 'Dzień dobry'; } elseif (\)hour < 18) { $greeting = ‘Dobre popołudnie’; } else { $greeting = ‘Dobry wieczór’; } ?> <!DOCTYPE html> Sklep — Lab 4 (PHP) 
<!-- ===== NAGŁÓWEK Z DYNAMICZNYM POWITANIEM ===== -->
<header class="text-center mb-4">
    <h1 class="display-6 fw-bold text-primary">🛒 CorpoShop</h1>
    <!-- PHP generuje tekst na podstawie godziny serwera -->
    <p class="text-muted"><?= $greeting ?>! Jest <?= date('H:i') ?>, <?= date('d.m.Y') ?></p>
</header>

<!-- ===== STATYSTYKI (obliczone w PHP) ===== -->
<div class="row g-3 mb-4">
    <div class="col-md-4">
        <div class="card border-0 shadow-sm text-center p-3">
            <span class="fs-3 fw-bold text-primary"><?= $total_products ?></span>
            <small class="text-muted">Produktów w ofercie</small>
        </div>
    </div>
    <div class="col-md-4">
        <div class="card border-0 shadow-sm text-center p-3">
            <span class="fs-3 fw-bold text-success"><?= number_format($total_value, 2, ',', ' ') ?> zł</span>
            <small class="text-muted">Łączna wartość</small>
        </div>
    </div>
    <div class="col-md-4">
        <div class="card border-0 shadow-sm text-center p-3">
            <span class="fs-3 fw-bold text-danger"><?= $out_of_stock ?></span>
            <small class="text-muted">Brak w magazynie</small>
        </div>
    </div>
</div>

<!-- ===== FILTRY KATEGORII (linki z $_GET) ===== -->
<div class="mb-4">
    <span class="text-muted me-2">Filtruj:</span>
    <a href="?category=all" 
       class="btn btn-sm <?= $selected_category === 'all' ? 'btn-primary' : 'btn-outline-primary' ?>">
        Wszystkie
    </a>
    <?php foreach ($categories as $cat): ?>
        <a href="?category=<?= urlencode($cat) ?>" 
           class="btn btn-sm <?= $selected_category === $cat ? 'btn-primary' : 'btn-outline-primary' ?>">
            <?= htmlspecialchars(ucfirst($cat)) ?>
        </a>
    <?php endforeach; ?>
</div>

<!-- ===== LISTA PRODUKTÓW (pętla PHP) ===== -->
<div class="row g-3">
    <?php if (empty($filtered)): ?>
        <div class="col-12">
            <div class="alert alert-info">Brak produktów w kategorii "<?= htmlspecialchars($selected_category) ?>"</div>
        </div>
    <?php else: ?>
        <?php foreach ($filtered as $product): ?>
            <div class="col-md-6 col-lg-4">
                <div class="card border-0 shadow-sm h-100 <?= $product['in_stock'] === 0 ? 'out-of-stock' : '' ?>">
                    <div class="card-body d-flex flex-column">
                        <!-- Kategoria jako badge -->
                        <span class="badge bg-primary bg-opacity-10 text-primary align-self-start mb-2">
                            <?= htmlspecialchars($product['category']) ?>
                        </span>

                        <h5 class="card-title"><?= htmlspecialchars($product['name']) ?></h5>
                        
                        <p class="fs-4 fw-bold text-primary mb-2">
                            <?= number_format($product['price'], 2, ',', ' ') ?> zł
                        </p>

                        <!-- Warunek: w magazynie czy nie? -->
                        <?php if ($product['in_stock'] > 0): ?>
                            <span class="badge bg-success badge-stock mb-3">
                                ✅ W magazynie (<?= $product['in_stock'] ?> szt.)
                            </span>
                        <?php else: ?>
                            <span class="badge bg-danger badge-stock mb-3">
                                ❌ Brak w magazynie
                            </span>
                        <?php endif; ?>

                        <button class="btn btn-primary mt-auto" 
                                <?= $product['in_stock'] === 0 ? 'disabled' : '' ?>>
                            <?= $product['in_stock'] > 0 ? 'Dodaj do koszyka' : 'Niedostępny' ?>
                        </button>
                    </div>
                </div>
            </div>
        <?php endforeach; ?>
    <?php endif; ?>
</div>

<!-- ===== INFORMACJE O PHP ===== -->
<div class="card border-0 shadow-sm mt-5 p-4">
    <h5 class="text-muted mb-3">🔧 Informacje diagnostyczne (PHP)</h5>
    <table class="table table-sm table-bordered mb-0">
        <tr><td class="fw-bold" style="width:200px">Wersja PHP</td><td><?= phpversion() ?></td></tr>
        <tr><td class="fw-bold">Serwer</td><td><?= htmlspecialchars($_SERVER['SERVER_SOFTWARE'] ?? 'N/A') ?></td></tr>
        <tr><td class="fw-bold">Metoda HTTP</td><td><?= $_SERVER['REQUEST_METHOD'] ?></td></tr>
        <tr><td class="fw-bold">Request URI</td><td><?= htmlspecialchars($_SERVER['REQUEST_URI']) ?></td></tr>
        <tr><td class="fw-bold">$_GET</td><td><code><?= htmlspecialchars(json_encode($_GET)) ?></code></td></tr>
    </table>
</div>