在php中，where语句可以在仓库模式中以这样的方式编写吗？

<?php

interface UserRepositoryInterface {
    public function findById(int $id): ?User;
    public function findByEmail(string $email): ?User;
}

class UserRepository implements UserRepositoryInterface {
    private $db;

    public function __construct(PDO $db) {
        $this->db = $db;
    }

    public function findById(int $id): ?User {
        $stmt = $this->db->prepare("SELECT * FROM users WHERE id = :id");
        $stmt->execute([':id' => $id]);
        $userData = $stmt->fetch(PDO::FETCH_ASSOC);

        return $userData ? new User($userData) : null;
    }

    public function findByEmail(string $email): ?User {
        $stmt = $this->db->prepare("SELECT * FROM users WHERE email = :email");
        $stmt->execute([':email' => $email]);
        $userData = $stmt->fetch(PDO::FETCH_ASSOC);

        return $userData ? new User($userData) : null;
    }
}

class User {
    private $id;
    private $name;
    private $email;

    public function __construct(array $data) {
        $this->id = $data['id'];
        $this->name = $data['name'];
        $this->email = $data['email'];
    }

    // Getters and setters
}

// 使用示例
$db = new PDO('mysql:host=localhost;dbname=test', 'username', 'password');
$userRepository = new UserRepository($db);

$user = $userRepository->findById(1);
if ($user) {
    echo "User found: " . $user->getName();
} else {
    echo "User not found";
}