PHP设计模式之组合模式定义与应用示例

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：

<?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)  {    $中考英语作文万能句子this->_items[] = $component;  }  public function remove($component)  {    $key = array_arch($component, $this->_items);    if ($key !== fal) unt($this->_items[$key]);  }  public function display()  {    echo "-- " . $this->_name . " --------- \r\n ";    foreach ($this->_items as $item) {      $item->displ家乡的小路ay();    }  }}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 = $menu;  }  public function tmenu(手机杀毒软件安全管家$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$objclient->tmenu($submenu2);$objclient->displaymenu();?>

运行结果：

屈原列传原文及翻译

— all menu ———
— sub menu1 ———
163#www.163.com
sina#www.sina.com
— sub menu2 ———
baidu#www.baidu.com
google#www.google.com
— sub menu3 —&高考补习学校#8212;—
baidu#www.baidu.com
google#www.google.com
— sub menu2 ———
baidu#www.baidu.com
google#www.google.com