function wp_trim_excerpt($text) {
   if ( '' == $text ) {
      $text = get_the_content('');
 
      $text = strip_shortcodes( $text );
 
      $text = apply_filters('the_content', $text);
      $text = str_replace(']]>', ']]>', $text);
      $text = strip_tags($text);
      $excerpt_length = apply_filters('excerpt_length', 55);
      $words = explode(' ', $text, $excerpt_length + 1);
      if (count($words) > $excerpt_length) {
         array_pop($words);
         array_push($words, '[Read More]');
         $text = implode(' ', $words);
      }
   }
   return $text;
}