模板模式

<?php

/**
 * 模板方法模式又叫模板模式，该模式在一个方法中定义一个算法的骨架，而将一些步骤延迟到子类中。
 * 模板方法使得子类可以在不改变算法结构的情况下，重新定义算法中的某些步骤。
 * 
 * 由于模板定义了子类的行为，所以是行为型模式
 */

abstract class Game
{
    abstract public function initialize();
    abstract public function start();
    abstract public function end();


    final public function play()
    {
        $this->initialize();
        $this->start();
        $this->end();
    }
}


class BasketBall extends Game
{
    public function initialize()
    {
        echo "<br/>BasketBall initialize";
    }

    public function start()
    {
        echo "<br/>BasketBall start";
    }

    public function end()
    {
        echo "<br/>BasketBall end";
    }
}

class FootBall extends Game
{
    public function initialize()
    {
        echo "<br/>FootBall initialize";
    }

    public function start()
    {
        echo "<br/>FootBall start";
    }

    public function end()
    {
        echo "<br/>FootBall end";
    }
}


$b = new BasketBall();
$b->play();

$f = new FootBall();
$f->play();