php设计模式重构篇

第一种 单一责任原则

class product
{
    public function productInfo()
    {
        echo "查看商品详细信息".PHP_EOL;
    }
}

class seckill
{
    public function seckillInfo()
    {
        echo "查看秒杀商品详细信息".PHP_EOL;
    }
}

class client
{
    public function run()
    {
        $product = new product();
        $seckill = new seckill();
        $product->productInfo();
        $seckill->seckillInfo();
    }
}

$client = new client();
$client->run();

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laravel框架的服务容器与服务容器的注册   =>   严格遵守了 单一原则
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开闭原则

interface SetStr
{
    public function boot();
}

class Num implements SetStr
{
    public function boot()
    {
        return rand(0,10000);
    }
}

class English implements SetStr
{
    public function boot()
    {
        $length = 4;
        $arr = ['a','b','c','d','e','f','g'];
        $indexs = array_rand($arr,$length);
        $str = '';
        foreach ($indexs as $index){
            $str .= $arr[$index];
        }
        return $str;
    }
}

class client
{
    public function run()
    {
        $num = new Num();
        return $num->boot();
    }
}

$client = new client();
echo $client->run();
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开闭原则可以有效的应对需求的变化
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开闭原则可以指导或者引领我们设计且灵活的系统
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