php - Checking for class instance within another class -

i have created user class has information user. also, have extended class class called loggedinuser.

the point of loggedinuser able tell if user authenticated , logged in checking existence of loggedinuser object this:

class user {  //properties }  class loggedinuser extends user {  //some additional token stuff }  $isloggedin = new loggedinuser();  class router {  public function gotoroute() {   if($isloggedin) {    // perform action   }  } } 

as far can tell, $isloggedin not accessible class, should pass constructor? or there better way of this?

in opinion have 2 options. can pass loggedinuser router::__construct(). or can create loggedinuser in router::__construct()

1st option:

$loggedinuser = new loggedinuser(); $router = new router($loggedinuser); 

2nd option

$router = new router();  // in router class file __construct() {     $this->yourproperty = new loggedinuser(); } 

i 1st option. called dependency injection