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<?php declare(strict_types=1); class User { protected const STATUS_ACTIVE = 'active'; protected const STATUS_INACTIVE = 'inactive'; public function __construct(protected string $username, protected string $status = self::STATUS_ACTIVE) { } protected function setStatus(string $status): void { assert( in_array($status, [self::STATUS_ACTIVE, self::STATUS_INACTIVE]), sprintf('Le status %s n\'est pas valide. Les status possibles sont : %s', $status, implode(', ', [self::STATUS_ACTIVE, self::STATUS_INACTIVE])) ); $this->status = $status; } protected function getStatus(): string { return $this->status; } } class Admin extends User { public const STATUS_LOCKED = 'locked'; // la méthode est entièrement ré-écrite ici :) seule la signature reste inchangée public function setStatus(string $status): void { assert( in_array($status, [self::STATUS_ACTIVE, self::STATUS_INACTIVE, self::STATUS_LOCKED]), sprintf('Le status %s n\'est pas valide. Les status possibles sont : %s', $status, implode(', ', [self::STATUS_ACTIVE, self::STATUS_INACTIVE, self::STATUS_LOCKED])) ); $this->status = $status; } // la méthode utilise celle de la classe parente, et ajoute un comportement :) public function getStatus(): string { return strtoupper(parent::getStatus()); } } $admin = new Admin('Paddington'); $admin->setStatus(Admin::STATUS_LOCKED); echo $admin->getStatus();

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