php 设计模式之 代理

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1. 代理模式

为其它对象提供一种代理以控制对这个对象的访问

2. 实列

interface SendMessage
{
    public function Send();
}

class RealSendMessage implements SendMessage
{
    public function Send()
    {
        echo '短信发送中...', PHP_EOL;
    }
}

class ProxySendMessage implements SendMessage {   // 代理类
    private $realSendMessage;

    public function __construct($realSendMessage)
    {
        $this->realSendMessage = $realSendMessage;
    }

    public function Send()
    {
        echo '短信开始发送', PHP_EOL;
        $this->realSendMessage->Send();
        echo '短信结束发送', PHP_EOL;
    }
}

$sendMessage = new ProxySendMessage(new RealSendMessage());
$sendMessage->Send();