php - How to limit a post feed? -

i have php class grabs post rss feed this:

1-post title 2-post image 3-post description 4-post links original

the problem post description long, need limit description few words.

include_once(abspath . wpinc . '/feed.php');     $rss = fetch_feed(' rss url ');      if (!is_wp_error( $rss ) ) :     $maxitems = 1;     $rss_items = $rss->get_items(0, $maxitems);     endif;     ?>     <?php if ($maxitems == 0) echo 'no items';     else     foreach ( $rss_items $item ) : ?>     <div id="deals">     <b><a href="<?php echo clean($item->get_permalink()); ?>" rel="nofollow" target="_blank"><?php echo $item->get_title(); ?></a></b>     <?php echo hapus(clean($item->get_content())); ?>     <p style="text-align:center;bottom:0;"><a title="order <?php echo $item->get_title(); ?>" href="<?php echo clean($item->get_permalink()); ?>" rel="nofollow" target="_blank"><img src="<?php bloginfo('template_url');?>/images/check.jpg" alt="<?php echo $item->get_title(); ?>" /></a></p>     </div>     <div class="clear"></div>     <?php endforeach; ?>     function clean($result) {  $result = trim($result); return $result; } function hapus($result){ $result = str_replace('<tbody>', '',$result); $result = str_replace('<tr>', '',$result); $result = str_replace('<td>', '<p>',$result); $result = str_replace('</td>', '</p>',$result); $result = str_replace('</tr>', '',$result); $result = str_replace('</tbody>', '',$result); $result = str_replace('<strike>', '',$result); $result = str_replace('</strike>', '',$result); $result = str_replace('<table>', '',$result); $result = str_replace('</table>', '',$result); $result = str_replace('</p></p>', '</p>',$result);  $result = trim($result);  return $result; }