PHP设计模式之工厂模式

<?php// 设计模式之工厂模式class Factory{ ?static public function fac ($id) ?{ ???switch ($id) { ?????case 1: ???????return new A();
 ?????case 2: ???????return new B();
 ?????case 3: ???????return new C();
 ?????default: ???????return new D(); ???} ?}} ?/** ??* 创建一个接口 ??*/ ?interFace FetchName ?{ ???public function getname(); ?} ?class A implements FetchName ?{ ???private $name = "A"; ???public function getname () ???{ ?????return $this->name; ???} ?} ?class B implements FetchName ?{ ???private $name = "B"; ???public function getname () ???{ ?????return $this->name; ???} ?} ?class C implements FetchName ?{ ???private $name = "C"; ???public function getname () ???{ ?????return $this->name; ???} ?} ?class D implements FetchName ?{ ???private $name = "D"; ???public function getname () ???{ ?????return $this->name; ???} ?}$obj = Factory::fac(5);echo $obj->getname();