How to display your latest tweets in your WordPress site without a plugin

include-tweets.php

<?php
// How to display your latest tweets in your WordPress site without a plugin
// Source: http://dinolatoga.com/2010/07/31/how-to-display-your-latest-tweets-in-your-wordpress-blog-without-a-plugin/

include_once(ABSPATH . WPINC . '/feed.php');

//configuration
$username = "EricRasch"; // Just insert the username of the Twitter account you want to display
$feed = "http://twitter.com/statuses/user_timeline/$username.rss"; // Changed the code from dinolatoga.com to actually use the username variable
$num = 2; // Set the number of Tweets you want to display

// this is a function which will convert text links to clickable links
function makeClickableLinks($text) {
$text = eregi_replace('(((f|ht){1}tp://)[-a-zA-Z0-9@:%_\+.~#?&//=]+)','<a href="\\1">\\1</a>', $text);
$text = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_\+.~#?&//=]+)','\\1<a href="http://\\2">\\2</a>', $text);
return $text;
}

$rss = fetch_feed($feed);
if (!is_wp_error( $rss ) ) :
     $maxitems = $rss->get_item_quantity($num);
     $rss_items = $rss->get_items(0, $maxitems);
endif;
?>

<ul>
     <?php if ($maxitems == 0) echo '<li>No items.</li>';
     else
     foreach ( $rss_items as $item ) : ?>
     <li>
     <?php
          $tweet = str_replace($username.':','',$item->get_title()); // replaces the username which is displayed on the feed
          $tweet = makeClickableLinks($tweet); // converts text links to clickable links
          $tweet = preg_replace('#@([\\d\\w]+)#', '<a href="http://twitter.com/$1">$0</a>', $tweet); // converts hashtags to clickable links
          $tweet = preg_replace('/#([\\d\\w]+)/', '<a href="http://twitter.com/search?q=%23$1">$0</a>', $tweet); // converts @username to links
          echo $tweet . " <small><a href='".$item->get_permalink()."'>" . human_time_diff($item->get_date('U'), current_time('timestamp')) . " ago</a></small>";
     ?>
     </li>
     <?php endforeach; ?>
</ul>