Question

I have this code:

class A
{
 public $db
}

class B
{
 public $cssA 

 public function __construct()
 {
  $this->cssA = new A();
 }
}

The question is, how can I call a method in class B from class A?

Answer 1

You can’t as there is no reference to the object of class B.

class A {
   public $db;

   private $b;

   public function __construct(B $b) {
       $this->b = $b;
   }
}

class B {
   private $a;

   public function __construct() {
       $this->a = new A($this);
   }
}

Methods of object of class B can be now accessed through $this->b->doSomething() within object of class A.