PHP设计模式之组合模式定义与应用示例_php技巧_

_name = $name; } public function add($component) { $this->_items[] = $component; } public function remove($component) { $key = array_search($component, $this->_items); if ($key !== false) unset($this->_items[$key]); } public function display() { echo "-- " . $this->_name . " --------- \r\n "; foreach ($this->_items as $item) { $item->display(); } } } class Item extends MenuComponent { private $_name = null; private $_url = null; public function __construct($name, $url) { $this->_name = $name; $this->_url = $url; } public function display() { echo $this->_name . "#" . $this->_url . " \r\n "; } } class Client { private $_menu = null; public function __construct($menu) { $this->_menu = $menu; } public function setMenu($menu) { $this->_menu = $menu; } public function displayMenu() { $this->_menu->display(); } } // 实例一下 // 人 $item3 = new Item("baidu", "www.baidu.com"); $item4 = new Item("google", "www.google.com"); $item1 = new Item("163", "www.163.com"); $item2 = new Item("sina", "www.sina.com"); // 班级 $subMenu1 = new Menu("sub menu1"); $subMenu1->add($item1); $subMenu1->add($item2); $subMenu2 = new Menu("sub menu2"); $subMenu2->add($item3); $subMenu2->add($item4); $subMenu3 = new Menu("sub menu3"); $subMenu3->add($item3); $subMenu3->add($item4); // 所有班级 $allMenu = new Menu("All Menu"); $allMenu->add($subMenu1); $allMenu->add($subMenu2); $allMenu->add($subMenu3); // 打印所有班级 $objClient = new Client($allMenu); $objClient->displayMenu(); // 打印第2 班级 $objClient->setMenu($subMenu2); $objClient->displayMenu(); ?>