PHP class question

[Peter van der Does <pvanderdoes@xxxxxxxxx>]

I have the following situation.

I wrote some software and split it up into functionality:

class core {
  function go{
  }
}

class A extends core {
  // PHP4 constructor
  function A {
    $this->go();
  }

}

class B extends core {
}

In core I define functions and variables that are to be used
through out my program and to address those functions/variables I just
use $this-> .

Now I ran into a situation where class A needs to be extended with
another class. This is not my choice, it's part of a framework I have
to use.

Currently I solved this by doing this:

class A extends framework_class {
  $var core;

  // PHP4 constructor
  function A {
    $this->core = new core();
    $this->core->go();
  }
}

The question I have, is this a good solution, is it the only solution
or are there different ways to tackle this?
As you might see it needs to run in PHP4.

-- 
Peter van der Does

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