Twitter Lists to RSS Feeds

composer.json

{
    "name": "barooney/twitter-list-rss",
    "authors": [
        {
            "name": "Daniel Baron",
            "email": "daniel@barooney.com"
        }
    ],
    "require": {
        "j7mbo/twitter-api-php": "^1.0",
        "suin/php-rss-writer": "^1.3"
    }
}

list.php

<?php

require_once('../vendor/autoload.php');

use Suin\RSSWriter\Channel;
use Suin\RSSWriter\Feed;
use Suin\RSSWriter\Item;

$list = $_GET['list'];

$list = str_replace('https://twitter.com/', '', $list);
preg_match('/^(.+?)\/lists\/(.+?)$/i', $list, $matches);
if(3 !== count($matches)) {
	return "This is not a valid Twitter List URL!";
}

$user = $matches[1];
$list = $matches[2];

$twitter = new TwitterAPIExchange([
	'consumer_key'              => 'YOUR_TWITTER_CONSUMER_KEY',
	'consumer_secret'           => 'YOUR_TWITTER_CONSUMER_SECRET',
	'oauth_access_token'        => 'YOUR_TWITTER_ACCESS_TOKEN',
	'oauth_access_token_secret' => 'YOUR_TWITTER_TOKEN_SECRET',
]);

$info = json_decode( 
	$twitter
		->setGetfield( '?slug=' . $list . '&owner_screen_name=' . $user )
		->buildOauth( 'https://api.twitter.com/1.1/lists/list.json', 'GET' )
		->performRequest()
)[0];

$statuses = json_decode( 
	$twitter
		->setGetfield( '?slug=' . $list . '&owner_screen_name=' . $user )
		->buildOauth( 'https://api.twitter.com/1.1/lists/statuses.json', 'GET' )
		->performRequest()
);

$feed = new Feed();

$channel = new Channel();
$channel
	->title($info->name)
	->description($info->description)
	->url('http://twitter.com' . $info->uri)
	->appendTo($feed);

// RSS item
foreach ($statuses as $status) {
	$status_url = 'https://twitter.com/statuses/' . $status->id_str;
	$item = new Item();
	$item
		->title('Tweet by ' . $status->user->name . ' (@' . $status->user->screen_name . ')')
		->description($status->text)
		->guid($status_url)
		->url($status_url)
		->appendTo($channel);
}

header('Content-Type: application/rss+xml');
$feed_str = '' . $feed;
$feed_str = str_replace('<channel>', '<channel><atom:link href="' . $_SERVER['REQUEST_URI'] . '" rel="self" type="application/rss+xml" />', $feed_str);
echo $feed_str;