title: How do you make strings "XML safe"?
body: <p>I am responding to an AJAX call by sending it an XML document through PHP echos.  In order to form this XML document, I loop through the records of a database.  The problem is that the database includes records that have '&lt;' symbols in them.  So naturally, the browser throws an error at that particular spot.  How can this be fixed?</p>