public function getUser()
{
if ($this->_user === false) {
$this->_user = User::findByUsername($this->username);
}
return $this->_user;
}public static function findByUsername($username)
{
foreach (self::$users as $user) {
if (strcasecmp($user['username'], $username) === 0) {
return new static($user);
}
}
return null;
}trait Singleton {
static private $instance = null;
...
static public function getInstance() {
return
self::$instance===null
? self::$instance = new static()//new self()
: self::$instance;
}
}