Proxy Pattern Example

example.php

<?php

interface MyAPI
{
    public function getThing();
}

class MyApiImplentation implements MyAPI
{
    public function getThing()
    {
        return 'some remote call';
    }
}

class MyApiCache implements MyAPI
{
    private $cache;
    private $api;

    public function __construct($cache, MyAPI $api)
    {
        $this->cache = $cache;
        $this->api = $api;
    }

    public function getThing()
    {
        if ($cache->hasItem() == false)
        {
            $info = $this->api->getThing();
            $this->cache->store($info);
        }

        return $this->cache->getItem();
    }
}


$api = new MyAPIImplementation();
$cache = new SomeCacheSystem();

$real_api_to_use = new MyApiCache($cache, $api);

http://jmather.com/2012/12/15/about-the-proxy-pattern/