XML : How to read a XML API with PHP

I am learning PHP and need to know how to get the elements in following XML API into an Array. I tried with simplexml_load_file() function. But it gave me an error.

Here are my code.

  <?php  $xml=simplexml_load_file("http://static.cricinfo.com/rss/livescores.xml");    foreach($xml->getElementsByTagName('item') as $match)  {      echo $match->getAttribute('title'), "\n";  }    ?>