Re: [PHP] OOP, Classes, Sharing Code

[Red Wingate]

Look correct from my point of view...
class Portfolio {
   var $portfolioID ;
   var $albums = array () ;
   function Portfolio ( $newID ) {
      $this->portfolioID = $newID ;
   }
   function addAlbum ( $album ) {
      $this->albums[] = $album ;
   }
   function getAlbum () {
      return current ( $this->album ) ;
   }
   ....
}
some knowlege on the iterator pattern is required though.... But you 
could even use a stack ( which i prefer )

class main {
   var $stack = NULL ;
   function create ( $ID ) {
      $this->stack = new stack ( $ID , $this->stack );
   }
   function remove ( $ID ) {
      $this->stack = $this->stack->remove();
   }
   function getID () {
      return $this->stack->getID();
   }
}
class stack {
   var $ID ;
   var $prev = NULL ;
   function stack ( $ID , $prev ) {
      $this->ID = $ID ;
      $this->prev = $prev ;
   }
   function getID () {
      return $this->ID ;
   }
   function remove () {
      return $this->prev ;
   }
}
$foo = new main();
$foo->create( 100 );
$foo->create( 200 );
echo $foo->getID();    // 200
$foo->remove();
$foo->create( 300 );
echo $foo->getID();    // 300
$foo->remove();
echo $foo->getID();    // 100
$foo->remove();
unset ( $foo );
[...]
from what you wrote it seems that only the type of display is similar in
both classes. I don't think this is enough to extend them from the same base
class because the class properties and update/insert/load methods will be
different in each.
You have more of a 'is part of' relationship here. So I'd suggest something
like this (simplified):
class Portfolio {
    var $portfolioID;
    var $albums = array();
}
class Album {
    var $albumID;
    var $portfolioID;
    var $photos = array();
}
class Photo {
    var $photoID;
    var $albumID;
    var $name;
}
[...]
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