Web Geliştirmenin Kalbi ve Senin Teknolojik Enerji Kaynağın

<?php // PHP kodları burada çalışır echo "Merhaba Dünya!"; $isim = "Ahmet"; echo "Hoş geldin, " . $isim; ?>

<?php
$servername = "localhost";
$username = "kullanici_adi";
$password = "sifre";
$dbname = "veritabani_adi";

// Bağlantı oluştur
$conn = new mysqli($servername, $username, $password, $dbname);

// Bağlantıyı kontrol et
if ($conn->connect_error) {
die("Bağlantı hatası: " . $conn->connect_error);
}

// Veri çekme örneği
$sql = "SELECT id, username, email FROM users WHERE active=1";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
while($row = $result->fetch_assoc()) {
echo "ID: " . $row["id"]. " - Kullanıcı: " . $row["username"]. " - Email: " . $row["email"]. "
";
}
} else {
echo "Sonuç bulunamadı";
}

$conn->close();
?>

<?php
try {
$pdo = new PDO("mysql:host=localhost;dbname=veritabani_adi", "kullanici_adi", "sifre");
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

text
// Güvenli veri çekme
$stmt = $pdo->prepare("SELECT * FROM users WHERE id = :id");
$stmt->execute(['id' => $user_id]);
$user = $stmt->fetch();
} catch(PDOException $e) {
echo "Hata: " . $e->getMessage();
}
?>

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
$ad = htmlspecialchars(trim($_POST['ad']));
$email = filter_var($_POST['email'], FILTER_VALIDATE_EMAIL);
$mesaj = htmlspecialchars(trim($_POST['mesaj']));

text
if ($ad && $email && $mesaj) {
    // Veritabanına kaydet veya email gönder
    echo "Form başarıyla gönderildi!";
} else {
    echo "Lütfen tüm alanları doğru doldurun!";
}
}
?>

<?php
session_start();

// Giriş kontrolü
if (isset($_POST['login'])) {
$username = $_POST['username'];
$password = $_POST['password'];

text
// Veritabanı kontrolü
$user = $db->query("SELECT * FROM users WHERE username = ?", [$username])->fetch();

if ($user && password_verify($password, $user['password'])) {
    $_SESSION['user_id'] = $user['id'];
    $_SESSION['username'] = $user['username'];
    header("Location: dashboard.php");
    exit;
} else {
    $error = "Kullanıcı adı veya şifre hatalı!";
}
}
?>

<?php
// CSRF Token üretimi
function generateCSRFToken() {
if (empty($_SESSION['csrf_token'])) {
$_SESSION['csrf_token'] = bin2hex(random_bytes(32));
}
return $_SESSION['csrf_token'];
}

// API Token üretimi
function generateAPIToken($userId) {
$payload = [
'user_id' => $userId,
'created' => time(),
'expires' => time() + (60 * 60 * 24) // 24 saat
];

text
return base64_encode(json_encode($payload)) . '.' . 
       hash_hmac('sha256', base64_encode(json_encode($payload)), 'gizli_anahtar');
}
?>

<?php
session_start();

// Oturum değişkenleri
$_SESSION['kullanici_id'] = 123;
$_SESSION['login_time'] = time();

// Cookie işlemleri
setcookie('kullanici_tercihi', 'dark_mode', time() + (86400 * 30), "/"); // 30 gün

// Güvenli oturum kontrolü
function checkSession() {
if (!isset($_SESSION['user_id']) ||
(time() - $_SESSION['login_time']) > 3600) { // 1 saat
header("Location: login.php");
exit;
}
}
?>

<?php
if (isset($[I]FILES['resim'])) {
$hedefKlasor = "uploads/";
$dosyaAdi = uniqid() . "[/I]" . basename($_FILES["resim"]["name"]);
$hedefYol = $hedefKlasor . $dosyaAdi;

text
// Dosya tipi kontrolü
$izinliTipler = ['jpg', 'jpeg', 'png', 'gif'];
$dosyaUzantisi = strtolower(pathinfo($hedefYol, PATHINFO_EXTENSION));

if (in_array($dosyaUzantisi, $izinliTipler)) {
    if (move_uploaded_file($_FILES["resim"]["tmp_name"], $hedefYol)) {
        echo "Dosya başarıyla yüklendi!";
        
        // Resmi optimize et
        compressImage($hedefYol, $hedefYol, 75);
    }
}
}

function compressImage($kaynak, $hedef, $kalite) {
$info = getimagesize($kaynak);

text
if ($info['mime'] == 'image/jpeg') {
    $image = imagecreatefromjpeg($kaynak);
    imagejpeg($image, $hedef, $kalite);
} elseif ($info['mime'] == 'image/png') {
    $image = imagecreatefrompng($kaynak);
    imagepng($image, $hedef, 9);
}

imagedestroy($image);
}
?>

<?php
// PayTR Entegrasyon Örneği
class PayTRIntegration {
private $merchant_id;
private $merchant_key;
private $merchant_salt;

text
public function __construct($id, $key, $salt) {
    $this->merchant_id = $id;
    $this->merchant_key = $key;
    $this->merchant_salt = $salt;
}

public function createPayment($orderData) {
    $hash = base64_encode(
        hash_hmac('sha256', 
            $this->merchant_id . $orderData['user_ip'] . $orderData['email'] . 
            $orderData['payment_amount'] . $orderData['merchant_oid'] . 
            $orderData['user_name'] . $this->merchant_salt, 
            $this->merchant_key, true
        )
    );
    
    // API isteği gönder
    $response = $this->callAPI($hash, $orderData);
    return $response;
}

private function callAPI($hash, $data) {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, "https://www.paytr.com/odeme/api/get-token");
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        'Content-Type: application/x-www-form-urlencoded'
    ]);
    
    $result = curl_exec($ch);
    curl_close($ch);
    
    return json_decode($result, true);
}
}
?>

<?php
// Routes/web.php
Route::get('/urunler', 'ProductController@index');
Route::post('/urun-ekle', 'ProductController@store');

// App/Http/Controllers/ProductController.php
class ProductController extends Controller {
public function index() {
$urunler = Product::with('category')->where('active', true)->get();
return view('products.index', compact('urunler'));
}

text
public function store(Request $request) {
    $request->validate([
        'name' => 'required|string|max:255',
        'price' => 'required|numeric'
    ]);
    
    Product::create($request->all());
    return redirect()->route('urunler')->with('success', 'Ürün eklendi!');
}
}
?>

<?php
class User extends CI_Controller {
public function __construct() {
parent::__construct();
$this->load->model('User_model');
$this->load->library('session');
}

text
public function profile($user_id) {
    $data['user'] = $this->User_model->get_user($user_id);
    $this->load->view('user_profile', $data);
}
}
?>

<?php
// Basit MVC benzeri yapı
class Router {
public function route($url) {
$parts = explode('/', $url);
$controller = $parts[0] ?: 'home';
$action = $parts[1] ?? 'index';

text
$controllerClass = ucfirst($controller) . 'Controller';
    
    if (class_exists($controllerClass)) {
        $controllerInstance = new $controllerClass();
        if (method_exists($controllerInstance, $action)) {
            $controllerInstance->$action();
        }
    }
}
}

class HomeController {
public function index() {
$db = new Database();
$products = $db->query("SELECT * FROM products WHERE active=1");
require 'views/home.php';
}
}
?>

<?php
// Union Types
class User {
public function find(int|string $id): User|false {
// id integer veya string olabilir
// dönüş User veya false olabilir
}
}

// Match Expression
$status = match($httpCode) {
200, 201 => 'success',
404 => 'not found',
500 => 'server error',
default => 'unknown'
};

// Named Parameters
function createUser(string $name, string $email, int $age = 0) {
// ...
}

createUser(name: "Ahmet", email: "ahmet@example.com");

// Attributes (Annotation'lar)
#[Route('/api/users')]
class UserController {
#[GET('/{id}')]
public function getUser(int $id) {
// ...
}
}

// Constructor Property Promotion
class User {
public function __construct(
public string $name,
public string $email,
private DateTime $createdAt = new DateTime()
) {}
}
?>

<?php
class ShoppingCart {
private $items = [];

text
public function addItem($productId, $quantity = 1) {
    if (isset($this->items[$productId])) {
        $this->items[$productId]['quantity'] += $quantity;
    } else {
        $this->items[$productId] = [
            'product_id' => $productId,
            'quantity' => $quantity,
            'added_at' => time()
        ];
    }
    
    $_SESSION['cart'] = $this->items;
}

public function getTotal() {
    $total = 0;
    foreach ($this->items as $item) {
        $product = $this->getProduct($item['product_id']);
        $total += $product['price'] * $item['quantity'];
    }
    return $total;
}
}
?>

<?php
class AdminDashboard {
public function getStats() {
return [
'total_users' => $this->getTotalUsers(),
'today_orders' => $this->getTodayOrders(),
'monthly_revenue' => $this->getMonthlyRevenue(),
'pending_reviews' => $this->getPendingReviews()
];
}

text
public function getRecentActivities() {
    return $this->db->query("
        SELECT activity_type, description, created_at 
        FROM admin_activities 
        ORDER BY created_at DESC 
        LIMIT 10
    ")->fetchAll();
}
}
?>