oop中php的$ this范围是多少？

Question

what is scope of $this in php,can we declare out side function , in class

class Blogs extends Controller

{

     public  $articlesmodel = $this->loadmodel('articlesmodel');
     public function index()
     {      
          if(!isset($_SESSION['user']['login_id'])){
            header("location:".URL);
           }
     }
}

Answer 1

For Blogs class it would be on the class boundaries. But you are extending Controller class also. So with $this you can access all the public & protected members of Controller class.

In the above code - $this->loadmodel('articlesmodel'); is accessing the method of Controller class(if Controller class is not extending any other class that contains the method).

Update

You cannot have expressions or function calls in the variable declarations.For the error do -

class Blogs extends Controller

{
     public $articlesmodel;
     function __construct()
     {
        $this->articlesmodel = $this->loadmodel('articlesmodel');
     }
     public function index()
     {      
          if(!isset($_SESSION['user']['login_id'])){
            header("location:".URL);
           }
     }
}