Script follower exchange (Generator) [closed]

I have the following code in php done by abraham in case it would be this system :

<?php
require_once './modules/Config.php';
require_once './libs/OAuth.php';
require_once './libs/twitteroauth.php';

// 1. to handle logout request
if(isset($_GET['logout'])){
  //unset the session
  session_unset();
  // redirect to same page to remove url paramters
  $redirect = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'];
    header('Location: ' . filter_var($redirect, FILTER_SANITIZE_URL));
}


// 2. if user session not enabled get the login url
if(!isset($_SESSION['data']) && !isset($_GET['oauth_token'])) {
  // create a new twitter connection object
  $connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET);
  // get the token from connection object
  $request_token = $connection->getRequestToken(OAUTH_CALLBACK); 
  // if request_token exists then get the token and secret and store in the session
  if($request_token){
    $token = $request_token['oauth_token'];
    $_SESSION['request_token'] = $token ;
    $_SESSION['request_token_secret'] = $request_token['oauth_token_secret'];
    // get the login url from getauthorizeurl method
    $login_url = $connection->getAuthorizeURL($token);
  }
}

// 3. if its a callback url
if(isset($_GET['oauth_token'])){
  // create a new twitter connection object with request token
  $connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET, $_SESSION['request_token'], $_SESSION['request_token_secret']);
  // get the access token from getAccesToken method
  $access_token = $connection->getAccessToken($_REQUEST['oauth_verifier']);
  if($access_token){  
    // create another connection object with access token
    $connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET, $access_token['oauth_token'], $access_token['oauth_token_secret']);
    // set the parameters array with attributes include_entities false
    $params =array('include_entities'=>'false');
    // get the data
    $data = $connection->get('account/verify_credentials',$params);
    if($data){
      // store the data in the session
      $_SESSION['data']=$data;
      // redirect to same page to remove url parameters
      //$redirect = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'];
      //header('Location: ' . filter_var($redirect, FILTER_SANITIZE_URL));
      header('Location:' . URL_BASE . '/dashboard');
    }
  }
}
?>

You're logging in straight away, I've been able to recover some information from my profile, etc., I wonder if I can use this code to do a follower exchange system? If so, what should I study?