title: Use a Class instance as an property of Another Class
body: <p>I would like to create a class with an instance of another class used as a property.  Something like this:</p>
  <pre><code>class person
  {
      var $name;
      var $address;
  }
  
  class business
  {
      var $owner = new person();
      var $type;
  }
  </code></pre>
  <p>This, of course, does not work, and I have tried a few variations.  Everything I have found in Google searches only references nested class definitions (<code>class a { class b{  } }</code>).</p>
  <p>Is it possible to put a class instance in another class?  If not, is there a reasonable work-around?</p>