Query errors in DOMXPath

Question

I'm trying to parse a xml file using DOMXPath class in PHP but I get some errors when I do queries. My XML have something like this

XML

<?xml version="1.0" encoding="UTF-8"?>
<news><new><title><!CDATA[bla bla bla]]></title><content><!CDATA[<p>bla bla bla</p>]]></content></new></news>

DOMXPath

$xml = new DOMDocument();
$xml->load( $filename );
$xpath = new DOMXPath( $xml );

$news = $xpath->query('//news');

The $news length is always 0, and news tag exists in xml file.

What am I doing wrong?

Best regards,

Ismael.

Answer 1

Check this :

I have modified some of your code :

<?php
    $doc = new DOMDocument;

    // We don't want to bother with white spaces
    $doc->preserveWhiteSpace = false;

    $doc->Load('book.xml');

    $xpath = new DOMXPath($doc);
    // We starts from the root element
    $query = '//news';

    $news = $xpath->query($query);
    print_r($news); 

?>

I am getting length value 1

book.xml

<?xml version="1.0" encoding="UTF-8"?>
<news><new><title>adsds</title><content>asdsa</content></new></news>

Answer 2

Note that you're querying the root tag ("news"), which is somewhat useless since there's only one root tag per XML file. Actually, you query is the same as query('/news'), which lengths will always be "1".

For your problem, note that your CDATA is malformed. It's <![CDATA[blah blah blah]]>, not <!CDATA[bla bla bla]] (missing bracket before CDATA).

This works

<?xml version="1.0" encoding="UTF-8"?>
<news>
  <new><title><![CDATA[<p>bla bla bla</p>]]></title><content><![CDATA[<p>bla bla bla</p>]]></content></new>
  <new><title><![CDATA[<p>bla bla bla</p>]]></title><content><![CDATA[<p>bla bla bla</p>]]></content></new>
  <new><title><![CDATA[<p>bla bla bla</p>]]></title><content><![CDATA[<p>bla bla bla</p>]]></content></new>
</news>

PHP script

<?php
$xml = new DOMDocument();
$xml->load('./test.xml');
$xpath = new DOMXPath( $xml );

$news = $xpath->query('//new');

var_dump($news->length);

Perfectly returns "3".