Here are two simple functions to display Twitter feeds on your website using PHP. The twitter_feed() function pulls the feed from Twitter RSS and returns it as a variable. This function also stores the feed in a database where it can be called in cases where the Twitter RSS feed is unavailable.

//Twitter Feed
function twitter_feed($username, $rss) {
  $hostname_connection = "db_hostname";
  $database_connection = "db_database";
  $username_connection = "db_username";
  $password_connection = "db_password";
  $connection = mysql_pconnect($hostname_connection, $username_connection, $password_connection) or die(mysql_error());
  
  $twitter_feed = '<table width="100%" border="0" cellspacing="0" cellpadding="0"><tr><td class="content_twitter" valign="baseline"><a href="http://twitter.com/'.$username.'" target="_blank"><img src="twitter-follow-me.png" alt="Twitter" border="0" align="right"></a>';
  
  $feedURL = $rss;
  $doc = new DOMDocument();
  if($doc->load($feedURL)) {
    $arrFeeds = array();
    foreach ($doc->getElementsByTagName('item') as $node) {
      $itemRSS = array ( 
        'title' => $node->getElementsByTagName('title')->item(0)->nodeValue,
        'pubDate' => $node->getElementsByTagName('pubDate')->item(0)->nodeValue
      );
      array_push($arrFeeds, $itemRSS);
    }
    
    $limit = 5;
    for($x=0; $x<$limit; $x++) {
      $title = str_replace('bavotasan: ', '', $arrFeeds[$x]['title']);
      $string = ereg_replace("[[:alpha:]]+://[^<>[:space:]]+[[:alnum:]/]","<a class=\"twitter_link\" href=\"\\0\" target=\"_blank\">\\0</a>", $title); 
      $pattern = '/[#|@][^\s]*/';
      preg_match_all($pattern, $string, $matches);    
      
      foreach($matches[0] as $keyword) {
        $keyword = str_replace(")", "", $keyword);
        $link = str_replace("#", "%23", $keyword);
        $link = str_replace("@", "", $keyword);
        if(strstr($keyword, "@")) {
          $search = '<a href="http://twitter.com/'.$link.'" target="_blank">'.$keyword.'</a>';
        }
        else {
          $link = urlencode($link);
          $search = '<a href="http://twitter.com/#search?q='.$link.'" target="_blank">'.$keyword.'</a>';
        }
        $string = str_replace($keyword, $search, $string);
      }
      $length = strlen($string);
      $string = substr($string, 15, $length);
      $twitter_feed .= '<a href="http://twitter.com/'.$username.'" target="_blank">@'.$username.'</a>: '.$string.'<div class="twitter_time">'.twitter_time($arrFeeds[$x]['pubDate']).' via Twitter</div><br />';
    }
    
    $twitter_feed .= '</td></tr><tr><td align="right"><a href="http://twitter.com/'.$username.'" target="_blank">..::Follow Us!</a></td></tr></table>';
    
    $updateSQL = sprintf('UPDATE twitter SET details="'.$twitter_feed.'" WHERE account="'.$username.'"');

    mysql_select_db($database_connection, $connection);
    mysql_query($updateSQL, $connection) or die(mysql_error());
  }
  
  else {
    mysql_select_db($database_connection, $connection);
    $query_twitter = sprintf('SELECT * FROM twitter WHERE account = "'.$username.'"');
    $twitter = mysql_query($query_twitter, $connection) or die(mysql_error());
    $row_twitter = mysql_fetch_assoc($twitter);
    $totalRows_twitter = mysql_num_rows($twitter);
    
    $twitter_feed = $row_twitter['details'];
  }
  
  return $twitter_feed;
}

The twitter_time() function takes the RSS time and converts it to human readable current server time.

//Twitter Time
function twitter_time($rss_time) {
  $time = date('Hm', strtotime($rss_time));
  $date = date('m/d/Y', strtotime($rss_time));
  
  if($date == system_date()) {
    if(system_time() - $time < 60) {
      $time_result = system_time() - $time;
      if($time_result <= 1) {$time_display = 'about a minute ago';}
      else {$time_display = $time_result.' minutes ago';}
    }
    else {
      $time_result = round(((system_time() - $time) / 60), 0);
      if($time_result == 1) {$time_display = 'about '.$time_result.' hour ago';}
      else {$time_display = 'about '.$time_result.' hours ago';}
    }
  }
  else {
    $time_result = date_difference($date, system_date());
    if($time_result == 1) {$time_display = $time_result.' day ago';}
    else {$time_display = $time_result.' days ago';}

    if($time_result > 7) {
      $date_explode = explode('/', $date);
      if($date_explode[2] == date('Y')) {
        $time = date('g:i A', strtotime($time));
        $date = date('M jS', mktime('00', '00', '00', $date_explode[0], $date_explode[1], $date_explode[2]));
        $time_display = $time.' '.$date;
      }
      else {
        $time = date('g:i A', strtotime($time));
        $date = date('M jS, Y', mktime('00', '00', '00', $date_explode[0], $date_explode[1], $date_explode[2]));
        $time_display = $time.' '.$date;
      }
    }
  }
  
  return $time_display;
}

Usage:

echo twitter_feed('your Twitter username', 'the URL to your Twitter RSS feed page');