Question

I tried this but couldn’t get it to work:

class Profile extends CI_Controller {

   public function index() {
      $foo = 'bar';
   }

   public function form_submit() {
      echo $this->index()->foo;
   }

}

I know I can make a variable accessible to all the methods in a class by declaring it outside all the methods at class level and declaring it as public. But here I need to declare the variable inside one of the methods.

Answer 1

If you are declaring it inside the method, you are out of luck unless you return the value.

class Profile {

    public function index() {
      $foo = 'bar';
      return $foo;
    }

    public function form_submit() {
      echo $this->index();
    }
}

A perhaps better alternative would be to declare it as an object variable (what you describe as “at class level”) but declare it private.

class Profile {

   private $foo;

   public function index() {
      $this->foo = 'bar';
   }

   public function form_submit() {
      echo $this->foo;
   }

}