Hello. I need to display the id attribute of CD from the following XML file. I display correctly everything except the id. Any help would be appreciate.

display code

<?php
$doc = new DOMDocument();
$doc->load( 'insert.xml' );

$CATEGORIES = $doc->getElementsByTagName( "CD" );   

foreach( $CATEGORIES as $CD )
{
  $TITLES = $CD->getElementsByTagName( "TITLE" );
  $TITLE = $TITLES->item(0)->nodeValue;

  $BANDS= $CD->getElementsByTagName( "BAND" );
  $BAND= $BANDS->item(0)->nodeValue;

  $YEARS = $CD->getElementsByTagName( "YEAR" );
  $YEAR = $YEARS->item(0)->nodeValue;

  echo "<b>$TITLE - $BAND - $YEAR\n</b><br>";
  }
?>

XML

<?xml version="1.0" encoding="utf-8"?>
<MY_CD>
<CATEGORIES>

<CD id="3231">
<TITLE>NEVER MIND THE BOLLOCKS</TITLE>
<BAND>SEX PISTOLS</BAND>
<YEAR>1977</YEAR>       
</CD>   

<CD id="2453">              
<TITLE>NEVERMIND</TITLE>
<BAND>NIRVANA</BAND>
<YEAR>1991</YEAR>   
</CD>

</CATEGORIES>
</MY_CD>