<?php /* * 中介者模式：用一个中介对象来封装一系列的对象交互,使各对象不需要显式地相互引用从而使其耦合松散,而且可以独立地改变它们之间的交互 *//* * 以一个同学qq群为例说明，qq作为中介者，同学作为相互交互的对象 *///抽象中介者，利用中介发送消息abstract class Mediator{	abstract function send($message,$user);}//抽象同事类，利用中介发送消息abstract class Colleague{	private $mediator;		public function __construct($mediator){		$this->mediator = $mediator;	}		public function send($message){		$this->mediator->send($message,$this);	}		abstract function notify($message);}//具体的同事类a b c d eclass StuA extends Colleague{	public function notify($message){		echo ‘Stu A says: ‘.$message;		echo "<br/>";	}}class StuB extends Colleague{	public function notify($message){		echo ‘Stu B says: ‘.$message;		echo "<br/>";	}}class StuC extends Colleague{	public function notify($message){		echo ‘Stu C says: ‘.$message;		echo "<br/>";	}}class StuD extends Colleague{	public function notify($message){		echo ‘Stu D says: ‘.$message;		echo "<br/>";	}}class StuE extends Colleague{	public function notify($message){		echo ‘Stu E says: ‘.$message;		echo "<br/>";	}}//具体的中介者class QQ extends Mediator{	public $users = array();		public function setUsers($user){//把对象添加进来		$this->users[] = $user;	}		public function send($message, $user){//推送消息		for($i=0;$i<count($this->users);$i++){			if($user == $this->users[$i]){				$this->users[$i]->notify($message);			}		}	}}class Client{	public static function main(){		//流程：先建立中介者		$qq = new QQ();		//实例化交互对象		$stu_a = new StuA($qq);		$stu_b = new StuB($qq);		$stu_c = new StuC($qq);		$stu_d = new StuD($qq);		$stu_e = new StuE($qq);		//把对象加入中介者		$qq->setUsers($stu_b);		$qq->setUsers($stu_a);		$qq->setUsers($stu_c);		$qq->setUsers($stu_d);		$qq->setUsers($stu_e);				//交流		$stu_a->send(‘昨天点名了吗，各位大神‘);		$stu_c->send(‘难道你没去‘);		$stu_a->send(‘是啊‘);		$stu_b->send(‘恭喜你中奖了‘);		$stu_d->send(‘恭喜你中奖了‘);		$stu_e->send(‘恭喜你中奖了‘);		$stu_a->send(‘我去‘);	}}Client::main();?>