仅在您真正需要时才实现功能，而不是在您认为将来可能需要它们时实现。
// Over-engineered solution anticipating future needs
class UserService {
private $database;
private $cache;
private $logger;
private $notifications;
private $analytics;
public function __construct(
DatabaseInterface $database,
CacheInterface $cache,
LoggerInterface $logger,
NotificationService $notifications,
AnalyticsService $analytics
) {
$this->database = $database;
$this->cache = $cache;
$this->logger = $logger;
$this->notifications = $notifications;
$this->analytics = $analytics;
}
public function createUser($data) {
$this->logger->info('Creating user');
$user = $this->database->insert('users', $data);
$this->cache->set('user_' . $user->id, $user);
$this->notifications->sendWelcomeEmail($user);
$this->analytics->trackUserCreation($user);
return $user;
}
}
class UserService {
private $database;
public function __construct(DatabaseInterface $database) {
$this->database = $database;
}
public function createUser($data) {
return $this->database->insert('users', $data);
}
}
// Bad: Implementing unused features
class Product {
private $name;
private $price;
private $stock;
private $weight; // Not needed yet
private $dimensions; // Not needed yet
private $shippingZones; // Not needed yet
private $taxCategories; // Not needed yet
private $customFields; // Not needed yet
public function calculateShipping($address) {
// Complex shipping calculation that isn't required
}
public function calculateTax($country) {
// Complex tax calculation that isn't required
}
}
// Good: Implementing what's needed now
class Product {
private $name;
private $price;
private $stock;
public function __construct(string $name, float $price, int $stock) {
$this->name = $name;
$this->price = $price;
$this->stock = $stock;
}
}
以上是YAGNI（你不需要它）的详细内容。更多信息请关注PHP中文网其他相关文章！
