title: load only part of an xml file with php
body: <p>I know I can use simplexml_load_file to load an xml file. The problem is, the xml file is HUGE, so it takes a while to load. The XML file is long, but is broken down into categories. I'm wondering if I can load just a portion of the file, based on the category. What I'd like to do is search the file before loading it completely, find the category that applies, and load only the nodes from that category. Somehow I don't think this can be done using just PHP... but I thought I'd ask. </p>
  
  <p>Here is the feed,
  <a href="http://www.sandiego.org/san-diego/xml-feeds/what-to-do-feed.aspx" rel="nofollow">http://www.sandiego.org/san-diego/xml-feeds/what-to-do-feed.aspx</a>
   and I'm trying to only pull an <code>&lt;item&gt;</code> node of its <code>&lt;category&gt;</code> is Fishing</p>