本文实例讲述了PHP设计模式之组合模式定义与应用。分享给大家供大家参考，具体如下：
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<?php/** * 组合模式 * * 将对象组合成树形结构以表示"部分-整体"的层次结构,使得客户对单个对象和复合对象的使用具有一致性 */abstract class MenuComponent{ public function add($component) { } public function remove($component) { } public function getName() { } public function getUrl() { } public function display() { }}class Menu extends MenuComponent{ private $_items = array(); private $_name = null; public function __construct($name) { $this->_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();?> |
运行结果：
-- All Menu ---------
-- sub menu1 ---------
163#www.163.com
sina#www.sina.com
-- sub menu2 ---------
baidu#www.baidu.com
google#www.google.com
-- sub menu3 ---------
baidu#www.baidu.com
google#www.google.com
-- sub menu2 ---------
baidu#www.baidu.com
google#www.google.com
希望本文所述对大家PHP程序设计有所帮助。
原文链接：https://blog.csdn.net/qq_22640823/article/details/103595212
