Код IT Загрузка примера кода…

PHP main.php 
<?php
require_once 'config.php';

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $email = trim($_POST['email'] ?? '');
    $password = $_POST['password'] ?? '';
    $password_confirm = $_POST['password_confirm'] ?? '';

    if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
        $error = 'Некорректный формат email';
    } elseif (strlen($password) < 8) {
        $error = 'Пароль должен содержать не менее 8 символов';
    } elseif ($password !== $password_confirm) {
        $error = 'Пароли не совпадают';
    } else {
        $stmt = $pdo->prepare("SELECT id FROM users WHERE email = ?");
        $stmt->execute([$email]);
        
        if ($stmt->fetch()) {
            $error = 'Пользователь с таким email уже существует';
        } else {
            $password_hash = password_hash($password, PASSWORD_DEFAULT);
            $stmt = $pdo->prepare("INSERT INTO users (email, password_hash) VALUES (?, ?)");
            $stmt->execute([$email, $password_hash]);
            
            $_SESSION['user_id'] = $pdo->lastInsertId();
            header('Location: index.php');
            exit;
        }
    }
}
?>
<!DOCTYPE html>
<html lang="ru">
<head>
    <meta charset="utf-8">
    <title>Регистрация</title>
    <style>
        body { font-family: Arial, sans-serif; max-width: 400px; margin: 50px auto; padding: 20px; }
        .form-group { margin-bottom: 15px; }
        label { display: block; margin-bottom: 5px; }
        input { width: 100%; padding: 8px; box-sizing: border-box; }
        button { width: 100%; padding: 10px; background: #007bff; color: white; border: none; cursor: pointer; }
        .error { color: #dc3545; margin-bottom: 15px; }
    </style>
</head>
<body>
    <h1>Регистрация</h1>
    
    <?php if (isset($error)): ?>
        <div class="error"><?php echo htmlspecialchars($error); ?></div>
    <?php endif; ?>
    
    <form method="post">
        <div class="form-group">
            <label for="email">Email</label>
            <input type="email" id="email" name="email" required>
        </div>
        <div class="form-group">
            <label for="password">Пароль</label>
            <input type="password" id="password" name="password" required>
        </div>
        <div class="form-group">
            <label for="password_confirm">Подтверждение пароля</label>
            <input type="password" id="password_confirm" name="password_confirm" required>
        </div>
        <button type="submit">Зарегистрироваться</button>
    </form>
    
    <a href="login.php" style="display: block; text-align: center; margin-top: 20px; color: #007bff; text-decoration: none;">
        Уже есть аккаунт? Войти
    </a>
</body>
</html>
<?php
require_once 'config.php';

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $email = trim($_POST['email'] ?? '');
    $password = $_POST['password'] ?? '';
    $password_confirm = $_POST['password_confirm'] ?? '';

    if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
        $error = 'Некорректный формат email';
    } elseif (strlen($password) < 8) {
        $error = 'Пароль должен содержать не менее 8 символов';
    } elseif ($password !== $password_confirm) {
        $error = 'Пароли не совпадают';
    } else {
        $stmt = $pdo->prepare("SELECT id FROM users WHERE email = ?");
        $stmt->execute([$email]);
        
        if ($stmt->fetch()) {
            $error = 'Пользователь с таким email уже существует';
        } else {
            $password_hash = password_hash($password, PASSWORD_DEFAULT);
            $stmt = $pdo->prepare("INSERT INTO users (email, password_hash) VALUES (?, ?)");
            $stmt->execute([$email, $password_hash]);
            
            $_SESSION['user_id'] = $pdo->lastInsertId();
            header('Location: index.php');
            exit;
        }
    }
}
?>
<!DOCTYPE html>
<html lang="ru">
<head>
    <meta charset="utf-8">
    <title>Регистрация</title>
    <style>
        body { font-family: Arial, sans-serif; max-width: 400px; margin: 50px auto; padding: 20px; }
        .form-group { margin-bottom: 15px; }
        label { display: block; margin-bottom: 5px; }
        input { width: 100%; padding: 8px; box-sizing: border-box; }
        button { width: 100%; padding: 10px; background: #007bff; color: white; border: none; cursor: pointer; }
        .error { color: #dc3545; margin-bottom: 15px; }
    </style>
</head>
<body>
    <h1>Регистрация</h1>
    
    <?php if (isset($error)): ?>
        <div class="error"><?php echo htmlspecialchars($error); ?></div>
    <?php endif; ?>
    
    <form method="post">
        <div class="form-group">
            <label for="email">Email</label>
            <input type="email" id="email" name="email" required>
        </div>
        <div class="form-group">
            <label for="password">Пароль</label>
            <input type="password" id="password" name="password" required>
        </div>
        <div class="form-group">
            <label for="password_confirm">Подтверждение пароля</label>
            <input type="password" id="password_confirm" name="password_confirm" required>
        </div>
        <button type="submit">Зарегистрироваться</button>
    </form>
    
    <a href="login.php" style="display: block; text-align: center; margin-top: 20px; color: #007bff; text-decoration: none;">
        Уже есть аккаунт? Войти
    </a>
</body>
</html>