-date_default_timezone_set('UTC');
-
-class Tweeper {
-
-  private static $USER_AGENT = "Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20130405 Firefox/22.0";
-
-  public function __construct($stylesheet, $generate_enclosure = FALSE) {
-    $stylesheet_contents = $this->get_contents($stylesheet);
-
-    $xslDoc = new DOMDocument();
-    $xslDoc->loadXML($stylesheet_contents);
-
-    $this->xsltProcessor = new XSLTProcessor();
-    $this->xsltProcessor->registerPHPFunctions();
-    $this->xsltProcessor->setParameter('', 'generateEnclosure', $generate_enclosure);
-    $this->xsltProcessor->importStylesheet($xslDoc);
-  }
-
-  public static function epoch_to_gmdate($timestamp)
-  {
-    return gmdate('D, d M Y H:i:s', $timestamp) . ' GMT';
-  }
-
-  public static function str_to_gmdate($date)
-  {
-    $timestamp = strtotime($date);
-    return Tweeper::epoch_to_gmdate($timestamp);
-  }
-
-  private static function get_contents($url)
-  {
-    $ch = curl_init($url);
-    curl_setopt_array($ch, array(
-      CURLOPT_HEADER => FALSE,
-      CURLOPT_FOLLOWLOCATION => TRUE,  // follow http redirects to get the real URL
-      CURLOPT_RETURNTRANSFER => TRUE,
-      CURLOPT_SSL_VERIFYHOST => FALSE,
-      CURLOPT_SSL_VERIFYPEER => FALSE,
-      CURLOPT_HTTPHEADER => array('Accept-language: en'),
-      CURLOPT_USERAGENT => Tweeper::$USER_AGENT,
-    ));
-    $contents = curl_exec($ch);
-    curl_close($ch);
-
-    return $contents;
-  }
-
-  private static function get_info($url)
-  {
-    $ch = curl_init($url);
-    curl_setopt_array($ch, array(
-      CURLOPT_HEADER => TRUE,
-      CURLOPT_NOBODY => TRUE,
-      CURLOPT_FOLLOWLOCATION => TRUE,  // follow http redirects to get the real URL
-      CURLOPT_RETURNTRANSFER => TRUE,
-      CURLOPT_SSL_VERIFYHOST => FALSE,
-      CURLOPT_SSL_VERIFYPEER => FALSE,
-      CURLOPT_USERAGENT => Tweeper::$USER_AGENT,
-    ));
-    curl_exec($ch);
-    $url_info = curl_getinfo($ch);
-    curl_close($ch);