Adapter pattern real life example

AdapterPattern.php

<?php

interface SocialInterface
{
    public function getFriends();
    public function getPosts();
}

class Facebook implements SocialInterface
{
    public function getFriends()
    {
        var_dump("get all facebook friends");
    }

    public function getPosts()
    {
        var_dump("get all facebook posts");
    }
}

class Twitter
{
    public function getFollowers()
    {
        var_dump("get Twitter followers");
    }

    public function getTweets()
    {
        var_dump("get all twitter tweets");
    }
}

class TwitterAdapter implements SocialInterface
{
    /**
     * @var Twitter
     */
    protected $twitter;

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

    public function getFriends()
    {
        $this->twitter->getFollowers();
    }

    public function getPosts()
    {
        $this->twitter->getTweets();
    }
}

class LinkedIn
{
    public function getConnections()
    {
        var_dump("get all linkedin connections");
    }

    public function getFeeds()
    {
        var_dump("get all linkedin feeds");
    }
}

class LinkedInAdapter implements SocialInterface
{
    /**
     * @var LinkedIn
     */
    protected $linkedIn;

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

    public function getFriends()
    {
        $this->linkedIn->getConnections();
    }

    public function getPosts()
    {
        $this->linkedIn->getFeeds();
    }
}

class Person
{
    public function social( SocialInterface $social )
    {
        $social->getPosts();
        $social->getFriends();
    }
}

$person = new Person();
$person->social(new Facebook());
$person->social(new TwitterAdapter(new Twitter()));
$person->social(new LinkedInAdapter(new LinkedIn()));