php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #80680 DOMNode::getNodePath() returns XPath that is invalid for DOMXPath::query()
Submitted: 2021-01-28 11:30 UTC Modified: 2021-02-08 17:10 UTC
From: andrey at email dot dp dot ua Assigned: cmb (profile)
Status: Not a bug Package: DOM XML related
PHP Version: Irrelevant OS: Debian Linux
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: andrey at email dot dp dot ua
New email:
PHP Version: OS:

 

 [2021-01-28 11:30 UTC] andrey at email dot dp dot ua 
Description:
------------
DOMNode::getNodePath() for DOMDocumentType node returns XPath value that is not valid for DOMXPath::query()

Test script:
---------------
<?php


$html = <<<EOF
<?xml version="1.0" encoding="UTF-8"?>
<!doctype html>
<html></html>
EOF;

$dom = new \DOMDocument();

$dom->loadHTML($html);
$xpath = new \DOMXPath($dom);

foreach ($dom->childNodes as $cur_child_node)
{
    if (!$cur_child_node instanceof DOMDocumentType)
    {
        continue;
    }

    $DOMDocumentType_xpath = $cur_child_node->getNodePath();

    echo "\$DOMDocumentType_xpath = ".$DOMDocumentType_xpath."\n";

    $nodelist = $xpath->query($DOMDocumentType_xpath);

    var_dump($nodelist);
}

Expected result:
----------------
$DOMDocumentType_xpath = /?

object(DOMNodeList)#7 (1) {
  ["length"]=>
  int(1)
}

Actual result:
--------------
$DOMDocumentType_xpath = /?

PHP Warning:  DOMXPath::query(): Invalid expression in test_xpath.php on line 30

bool(false)

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2021-01-28 14:07 UTC] cmb@php.net
-Status: Open +Status: Suspended -Assigned To: +Assigned To: cmb
 [2021-01-28 14:07 UTC] cmb@php.net 
This looks like an upstream (i.e. libxml2) issue.
xmlGetNodePath() returns the broken xpath /?, while, to my
knowledge, a DTD shouldn't be addressable with any xpath query,
i.e. xmlGetNodePath() should return NULL in this case.

I've written to the xml mailing list[1], and suspend this ticket
for the time being.

[1] <https://mail.gnome.org/archives/xml/2021-January/msg00012.html>
 [2021-02-08 17:10 UTC] cmb@php.net
-Status: Suspended +Status: Not a bug
 [2021-02-08 17:10 UTC] cmb@php.net 
Indeed, that has been recognized as issue in libxml2[1], so it's
not a bug in PHP.

[1] <https://mail.gnome.org/archives/xml/2021-February/msg00000.html>
 
PHP Copyright © 2001-2025 The PHP Group
All rights reserved. 		Last updated: Thu Jan 16 13:01:29 2025 UTC