设计模式-Proxy(代理模式)

代理模式-控制对象访问
定义：代理模式为另一个对象提供一个替身或占位符以控制对这个对象的访问。

<?php
interface Bank{
    public function loan($ID,$num); //贷款
    public function deposit($ID,$num); //存款
}

class ICBCBank implements Bank{
    public function loan($ID,$num){
        return "{$ID} Loan {$num} \r\n";
    }
    public function deposit($ID,$num){
        return "{$ID} Deposit {$num} \r\n";
    }
}

class ProxyBank implements Bank{
    public $proxyBank;
    public $name;
    public function __construct($name){
        $this->name = $name;
        $this->proxyBank = new ICBCBank();
    }
    public function loan($ID,$num){
        $back = $this->proxyBank->loan($ID, $num);
        echo $this->name.'---'.$back;
    }
    public function deposit($ID,$num){
        $back = $this->proxyBank->deposit($ID, $num);
        echo $this->name.'---'.$back;
    }
}

$wangbatuoziBank = new ProxyBank('WangBaTuoZiBank');
$wangbatuoziBank->loan(123456, 10000);
$wangbatuoziBank->deposit(243456, 6000000);