Show Twitter Feed on my website - php

Question

Up until a few weeks ago the below code worked great to grab my last three tweets and display them on my website. now it's not working. I've looked through Twitter's messages boards to see if something changed to no avail.
Does anyone know how to effectively display your latest tweets on a website using php?
my original code is here. Like I said, this worked up until a few weeks ago:
$twitterUsername = "myUsername";
$amountToShow = 3;
$twitterRssFeedUrl = 'https://api.twitter.com/1/statuses/user_timeline.rss?screen_name='.$twitterUsername.'&count='.$amountToShow;
$twitterPosts = false;
$xml = #simplexml_load_file($twitterRssFeedUrl);
if(is_object($xml)){
foreach($xml->channel->item as $twit){
if(is_array($twitterPosts) && count($twitterPosts)==$amountToShow){
break;
}
$d['title'] = stripslashes(htmlentities($twit->title,ENT_QUOTES,'UTF-8'));
$description = stripslashes(htmlentities($twit->description,ENT_QUOTES,'UTF-8'));
if(strtolower(substr($description,0,strlen($twitterUsername))) == strtolower($twitterUsername)){
$description = substr($description,strlen($twitterUsername)+1);
}
$d['description'] = $description;
$d['pubdate'] = strtotime($twit->pubDate);
$d['guid'] = stripslashes(htmlentities($twit->guid,ENT_QUOTES,'UTF-8'));
$d['link'] = stripslashes(htmlentities($twit->link,ENT_QUOTES,'UTF-8'));
$twitterPosts[]=$d;
}
}else{
die('Can`t fetch the feed you requested');
}
and then it turns up in the html like so:
<dl class="twitter">
<dt>Twitter Feed</dt>
<?php
if(is_array($twitterPosts)){
echo '';
foreach($twitterPosts as $post){
$data = hyperlinks($post['description']);
$data = twitter_users($data);
echo '<dd>'.$data.'. ';
echo 'Posted '.time2str(date($post['pubdate'])).'</dd>';
}
echo '';
}else{
echo 'No Twitter posts have been made';//Error message
}
?>
<dd>

Answer 1

Twitter API 1.0 that you're using has been switched off, as of a few weeks ago.
Read up on the API 1.1 here: https://dev.twitter.com/docs/api
There are tonnes of PHP libraries for working with the new API, including mine.

Answer 2

The Twitter REST API v1 is no longer active. Please migrate to API v1.1. https://dev.twitter.com/docs/api/1.1/overview.