Show Twitter friend's last post datetime

friends.php

<?php

require_once(dirname(__file__) . "/twitteroauth/twitteroauth.php");
date_default_timezone_set('Asia/Tokyo');
define('TWITTER_CONSUMER_KEY', '***');
define('TWITTER_CONSUMER_SECRET', '***');
define('TWITTER_ACCESS_TOKEN', '***');
define('TWITTER_ACCESS_TOKEN_SECRET', '***');

// https://dev.twitter.com/rest/reference/get/friends/list
function requestFriendsList($twitterObject, $cursor) {
  $params = array(
    'screen_name' => 'rakuishi07',
    'count' => '200',
    'include_user_entities' => 'false',
    'cursor' => (is_null($cursor)) ? '-1' : $cursor,
  );
  return $twitterObject->OAuthRequest('https://api.twitter.com/1.1/friends/list.json', 'GET', $params);
}

function getTwitterFriends() {

  echo "Loading...\n";
  $twitterObject = new TwitterOAuth(TWITTER_CONSUMER_KEY, TWITTER_CONSUMER_SECRET, TWITTER_ACCESS_TOKEN, TWITTER_ACCESS_TOKEN_SECRET);

  $cursor = -1;
  $friends = array();
  do {
    $request = requestFriendsList($twitterObject, $cursor);
    $json = json_decode($request);
    $cursor = $json->next_cursor;
    $users = $json->users;
    foreach ($users as $user) {
      $date = DateTime::createFromFormat('D M j H:i:s P Y', $user->status->created_at);
      $friends[] = array(
        'screen_name' => $user->screen_name,
        'created_at' => $date->getTimestamp(),
      );
    }
    echo count($friends) . "\n";

  } while (!is_null($cursor) && $cursor != 0);

  $keys = array();
  foreach ($friends as $key => $value){
    $keys[$key] = $value['created_at'];
  }
  array_multisort($keys , SORT_ASC , $friends);

  $now = time();
  foreach ($friends as $friend) {
    $day = ($now - $friend['created_at']) / 86400;
    echo $friend['screen_name'] . ' ' . $day . "\n";
  }
}

getTwitterFriends();