/**
  * Retrieves a message, removes it from the session and prints it - will not print if no content
  *
  * The message will be printed in a `p` tag if it does not contain
  * any block level HTML, otherwise it will be printed in a `div` tag.
  *
  * @param  mixed  $name       The name or array of names of the message(s) to show, or `'*'` to show all
  * @param  string $recipient  The intended recipient
  * @param  string $css_class  Overrides using the `$name` as the CSS class when displaying the message - only used if a single `$name` is specified
  * @return boolean  If one or more messages was shown
  */
 public static function show($name, $recipient = NULL, $css_class = NULL)
 {
     if ($recipient === NULL) {
         $recipient = '{default}';
     }
     // Find all messages if * is specified
     if (is_string($name) && $name == '*') {
         fSession::open();
         $prefix = __CLASS__ . '::' . $recipient . '::';
         $keys = array_keys($_SESSION);
         $name = array();
         foreach ($keys as $key) {
             if (strpos($key, $prefix) === 0) {
                 $name[] = substr($key, strlen($prefix));
             }
         }
     }
     // Handle showing multiple messages
     if (is_array($name)) {
         $shown = FALSE;
         $names = $name;
         foreach ($names as $name) {
             $class = trim(self::$class . ' ' . $name);
             $class = $css_class === NULL ? $class : $css_class;
             $shown = fHTML::show(self::retrieve($name, $recipient), $class, TRUE) || $shown;
         }
         return $shown;
     }
     $class = self::$class . ' ' . $name;
     $class = $css_class === NULL ? $class : $css_class;
     // Handle a single message
     return fHTML::show(self::retrieve($name, $recipient), $class, TRUE);
 }