This code snippet shows all interactions with the Twitter API, I have added comments below to highlight each time the API is used in more detail.

<?php
.......
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$app->setName('Maker Tools');

use Abraham\TwitterOAuth\TwitterOAuth;

define('CONSUMER_KEY', 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx');
define('CONSUMER_SECRET', 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx');
define('OAUTH_CALLBACK', 'http://makertools.xyz/twitter.auth.callback.php?callback');

$client_id = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';
$client_secret = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';


$app->get('/', function () use ($app) {
    .............
    .............
    //return list of all upvotes   
    if(!isset($_GET['action'])){
        $postid = $_GET['post_id'];
        $name = $_GET['name'];
        $thandles = json_encode($twitterHandles);
        $app->render('makeaction.twig', 
        array('title' => 'Select Action', 
            'postid' => $postid, 
            'name' => $name, 
            'thandles' => $thandles,
            'twitterhandles' => $twitterHandles
            ) 
        );
    }
            
    $tweeters = json_encode($twitterHandles);
                
    if(isset($action))
    {
        $action = $action;
        $ids = array();
        $names = array();
        $peoples = json_decode($tweeters);
        foreach($peoples as $people)
        {
            $ids[] = $people->id;
            $names[] = $people->name;
        }
        //LIVE
        $handles = $names;
                
        $connection = new TwitterOAuth(
            CONSUMER_KEY, 
            CONSUMER_SECRET,
            $access_token['oauth_token'],
            $access_token['oauth_token_secret']
        );
            
        if($action == 'list')
        {
            //Check list type
            $list_mode = $type;
            if($list_mode != 'public' && $list_mode != 'private'){
                $list_mode = 'public';
            }
            //Create new list
            $query = array('name' => 'Product Upvote List', 'mode' => $list_mode, 'description' => 'Upvoted '.$name.' on product hunt');
            $list = $connection->post('/lists/create', $query);        
            $slug = $list->slug;
            $owner = $list->user->screen_name;
                          
            //Total handles
            $total_handles = count($handles);
            $number_loop = ceil(($total_handles/100)); 
            
            //Check if more than 100 upvoters
            if($number_loop > 1){
                    
                for ($x = 0; $x < $number_loop; $x++) {

                    $offset = 100*(int)$x;
                    $use_array = array_slice($handles, $offset, 100, true);

                    //Update list
                    $query = array('screen_name' => implode(',',$use_array), 'slug' => $slug, 'owner_screen_name' => $owner); 
                    $listmem = $connection->post('lists/members/create_all', $query);

                } 
            }else{
                        
                //Can only use 100 at a time must add loop to make this work
                $query = array('screen_name' => implode(',',$handles), 'slug' => $slug, 'owner_screen_name' => $owner); 
                $listmem = $connection->post('lists/members/create_all', $query);
            }
                    
            $response = 'Your list has been created';
                    
        }
                
        $app->render('actioncomplete.twig', array('name' => $twittername, 'title' => 'Complete', 'response' => $response ) );
    }       
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