<?php
class ColorPen {
//彩笔颜色，默认黑色
function __construct($color = '黑色') {
$this->color = $color;
}
/**
* 生成彩笔
*/
public function create() {
echo "我得到一个{$this->color}的笔\n";
}
/**
* 设置彩笔颜色
* @param $color 彩笔颜色
*/
public function setColor($color) {
$this->color = $color;
}
/**
* 获取当前彩笔颜色
*/
public function getColor() {
return $this->color;
}
}
$pen = new ColorPen(); //初始化没有提供颜色，默认黑色
$color = $pen->getColor();
echo "当前颜色：{$color} \n";
$pen->setColor("红色");
$color = $pen->getColor();
echo "设置后颜色：{$color} \n";
$penRed = new ColorPen("红色");
$penGreen = new ColorPen("绿色");
$penBlue = new ColorPen("蓝色");
echo $penRed->create();
echo $penGreen->create();
echo $penBlue->create();
