1. <?php
    2. class ProductsA {
    3. }
    4. class ProductsB {    
    5. }
    6. //工厂模式
    7. class ProductsFactory {
    8.     public function create($num) {
    9.         switch($num) {
    10.             case 1:
    11.                 return new ProductsA;
    12.             case 2:
    13.                 return new ProductsB;
    14.             default:
    15.                 return null;
    16.         }
    17.     }
    18. }
    19. //测试
    20. $factory=new ProductsFactory();
    21. $obj1=$factory->create(1);
    22. $obj2=$factory->create(2);
    23. var_dump($obj1,$obj2); //object(ProductsA)#2 (0) { } object(ProductsB)#3 (0) { }