PHP面向对象设计模式

PHP面向对象设计模式

1.版本一

<?php

/**
 * Created by Victor
 * User: Victor
 * Date: 2018/3/16
 * Time: 9:54
 */
abstract class Lesson
{
    protected $duration;
    const FIXED = 1;
    const TIMED = 2;
    private $_costtype;

    function __construct($duration, $costtype = 1)
    {
        $this->_costtype = $costtype;
        $this->duration  = $duration;
    }

    public function cost()
    {
        switch ($this->_costtype) {
            case self::FIXED:
                return 5 * $this->duration;
                break;
            case self::TIMED:
                return 30;