Simple Question - Best way to check for login status

[eluser]PoetaWD[/eluser]
Hello All,

I am very new to PHP and programming...

I am developing a application where to enter a page the system checks if the user is logged in or not...

My question is not regarding that...

The question I have is about how is the best way of doing it...

Is it safe to do like this:

Code:

function check_login
{
   if(!$this->dx_auth->is_logged_in())
   {
      redirect('welcome');
   }
}

function index
{
   $this->check_login();
  
   //... THE REST OF MY CODE

}

The way I AM DOING IS THIS,

Code:

function index
{
   if(!$this->dx_auth->is_logged_in())
   {
      //... THE REST OF MY CODE
   }
   else
   {
      redirect('welcome');
   }
}

I am sure this way is safe... All I want to know, to cleanup my code is if that other way is also safe.... or users can prevent not to be redirected....

Thanks in advance

Gabriel