Quick script to get all of the followers for Twitter users.

followers.php

<?php
// Require the TwitterOAuth library. http://github.com/abraham/twitteroauth
require_once('twitteroauth/twitteroauth.php');
$connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET, ACCESS_TOKEN, ACCESS_SECRET);

// Empty array that will be used to store followers.
$profiles = array();
// Get the ids of all followers.
$ids = $connection->get('followers/ids');
// Chunk the ids in to arrays of 100.
$ids_arrays = array_chunk($ids, 100);

// Loop through each array of 100 ids.
foreach($ids_arrays as $implode) {
  // Perform a lookup for each chunk of 100 ids.
  $results = $connection->get('users/lookup', array('user_id' => implode(',', $implode)));
  // Loop through each profile result.
  foreach($results as $profile) {
    // Use screen_name as key for $profiles array.
    $profiles[$profile->screen_name] = $profile;
  }
}

// Array of user objects.
var_dump($profiles);

Can this will come to 'rate limit exceeded' error of twitter api or not ?