XML : something wrong with simplexmlelement content

there something is wrong with line 4 how can i fix?

function feedocimpress($feed_url) {

  $content = file_get_contents($feed_url);  $x = new SimpleXmlElement($content);    foreach($x->channel->item as $entry) {      echo '<p><strong><a href="'.$entry->link.'" title="'.$entry->title.'">' . $entry->title . '</a></strong><br /><small><em>' . $entry->pubDate.'</em></small></p>';  }    

}