switch ($type) {
case "normal":
//正常收费
$this->cs = new CashNormal();
break;
case "return":
//满300反100
$this->cs = new CashReturn("300", "100");
break;
case "rebate":
//打八折
$this->cs = new CashRebate('0.8');
break;
}
}
//获取最终结算后的金额
public function getResult($srcMoney)
{
return $this->cs->acceptCash($srcMoney);
}
}
//终端用户调用测试
$cash = new CashContext('return');
echo $cash->getResult('500') . "\n";
//以上满300减100，结果是400
$cash = new CashContext('rebate');
echo $cash->getResult('500') . "\n";
//以上打8折,结果是400
$cash = new CashContext('normal');
echo $cash->getResult('500') . "\n";
//以上正常收款,结果是500
//通过构造方法传入具体的策略
public function __construct($cashSuper)
{
$this->cashSuper = $cashSuper;
}
public function getResult($money)
{
return $this->cashSuper->acceptCash($money);
}
}
////////////////////////////////////////////////////////////////
//客户端代码
$money = 625;
//商品总额
//$str='正常收费';//界面中的下拉框
//$str='打折收费';//界面中的下拉框
$str = '返利收费';
//界面中的下拉框
switch ($str) {
case '正常收费':
$contextObj = new CashContext(new CashNormal());
break;
case '打折收费':
$contextObj = new CashContext(new CashRebate(0.8));
break;
case '返利收费':
$contextObj = new CashContext(new CashReturn(500, 10));
break;
}
$payMoney = $contextObj->getResult($money);
var_dump($payMoney);
<?php
$cashContext = new CashContext($_POST['type']);
$result = $cashContext->ContextResult($_POST['price']);
echo $result;
class CashContext
{
private $cs;
public function CashContext($type)
{
switch ($type) {
case 'nomal':
$this->cs = new CashNomal();
break;
case 'rebate':
$this->cs = new CashRebate(0.8);
break;
case 'return':
$this->cs = new CashReturn(300, 100);
break;
}
}
public function ContextResult($money)
{
return $this->cs->acceptCash($money);
}
}
abstract class CashSuper
{
protected abstract function acceptCash($money);
}