Try the library:
http://dev.twitter.com/pages/libraries#php
Or, if for some reason they seem redundant, load the feed via cURL and simplexml_load_string. Manipulate if necessary.
This will show your last tweet:
<?php
$ch = curl_init("http://twitter.com/statuses/user_timeline/{yourtwitterfeed}.rss");
curl_setopt($ch,CURLOPT_HEADER,0);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
$data = simplexml_load_string(curl_exec($ch));
curl_close($ch);
echo $data->channel->item[0]->title;
EDIT: Ha. simplexml_load_file ( "{url }" ) cURL. , .