Multiple excerpt lengths in wordpress

 class Excerpt {

   // Default length (by WordPress)
   public static $length = 55;

   // So you can call: my_excerpt('short');
   public static $types = array(
       'short' => 25,
       'regular' => 55,
       'long' => 100
     );

   /**
    * Sets the length for the excerpt,
    * then it adds the WP filter
    * And automatically calls the_excerpt();
    *
    * @param string $new_length 
    * @return void
    * @author Baylor Rae'
    */
   public static function length($new_length = 55) {
     Excerpt::$length = $new_length;

     add_filter('excerpt_length', 'Excerpt::new_length');
     add_filter('excerpt_more', 'Excerpt::new_excerpt_more');

     Excerpt::output();
   }

   // Tells WP the new length
   public static function new_length() {
     if( isset(Excerpt::$types[Excerpt::$length]) )
       return Excerpt::$types[Excerpt::$length];
     else
       return Excerpt::$length;
   }

   public static function new_excerpt_more( $more ) {
      return '...';
   }

   // Echoes out the excerpt
   public static function output() {
     the_excerpt();
   }

 }

 // An alias to the class
 function my_excerpt($length = 55) {
   Excerpt::length($length);
 }