1 <?php
 2 
 3 class Sea{}
 4 class EarthSea extends Sea{}
 5 class MarsSea extends Sea{}
 6 
 7 class Plains{}
 8 class EarthPlains{}
 9 class MarsPlains{}
10 
11 class Forest{}
12 class EarthForest{}
13 class MarsForest{}
14 
15 
16 
17 class TerrainFactory{
18     private $sea;
19     private $forest;
20     private $plains;
21     
22     function __construct(Sea $sea,Plains $plains,Forest $forest){
23         $this->sea = $sea;
24         $this->plains = $plains;
25         $this->forest = $forest;
26     }
27     
28     function getSea(){
29         return clone $this->sea;
30     }
31     function getPlains(){
32         return clone $this->plains;
33     }
34     function getForest(){
35         return clone $this->forest;
36     }
37 }
38 
39 
40 $factory = new TerrainFactory(new EarthSea,new EarthPlains, new EarthForest);
41 print_r($factory->getSea());
42 print_r($factory->getPlains());
43 print_r($factory->getForest());
44 
45 $mars_factory = new TerrainFactory(new MarsSea,new MarsPlains, new MarsForest);
46 print_r($mars_factory->getSea());
47 print_r($mars_factory->getPlains());
48 print_r($mars_factory->getForest());