Bug #81351 [NEW]: xml_parse errors, but has no error code, when xmlns isn't a FQDN

From: Date: Wed, 11 Aug 2021 19:04:56 +0000
Subject: Bug #81351 [NEW]: xml_parse errors, but has no error code, when xmlns isn't a FQDN
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-235777@lists.php.net to get a copy of this message 
From:             dave dot lampert at rpm6 dot com
Operating system: Windows
PHP version:      8.0.9
Package:          *XML functions
Bug Type:         Bug
Bug description:xml_parse errors, but has no error code, when xmlns isn't a FQDN

Description:
------------
---
From manual page: https://php.net/function.xml-parse
---
If xml_parse tries to parse XML containing <X xmlns="something">, it
sees that "something" doesn't start with "http://" or "https://", so
xml_parse returns 0; however, xml_get_error_code also returns 0 ("No
error"). This only happens when parsing in fragments near that bad XML
namespace.

Test script:
---------------
<?php
class XMLProcessor
{
    public function test()
    {
        $bad_xmlns = true;
        $parser = xml_parser_create_ns('UTF-8');
        xml_set_object($parser, $this);
        $success = xml_parse($parser, '<?xml version="1.0"
encoding="utf-8"?><soap:Envelope
xmlns:soap="http://www.w3.org/2003/05/soap-envelope"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><X
xmlns="'.($bad_xmlns ? '' : 'http://').'example.org"><', false);
        $code = xml_get_error_code($parser);
        $error = xml_error_string($code);
        echo "xml_parse returned $success, xml_get_error_code = $code,
xml_error_string = $error\r\n";
        $success = xml_parse($parser, 'Y>', false);
        $code = xml_get_error_code($parser);
        $error = xml_error_string($code);
        echo "xml_parse returned $success, xml_get_error_code = $code,
xml_error_string = $error\r\n";
    }
}
(new XMLProcessor())->test();

Expected result:
----------------
xml_parse returned 1, xml_get_error_code = 0, xml_error_string = No
error
xml_parse returned 0, xml_get_error_code = {some number),
xml_error_string = {some description}

Actual result:
--------------
xml_parse returned 1, xml_get_error_code = 0, xml_error_string = No
error
xml_parse returned 0, xml_get_error_code = 0, xml_error_string = No
error

-- 
Edit bug report at https://bugs.php.net/bug.php?id=81351&edit=1
-- 
Fix committed:                    https://bugs.php.net/fix.php?id=81351&r=fixed
Fixed in release:                 https://bugs.php.net/fix.php?id=81351&r=alreadyfixed
Need backtrace:                   https://bugs.php.net/fix.php?id=81351&r=needtrace
Need Reproduce Script:            https://bugs.php.net/fix.php?id=81351&r=needscript
Try newer version:                https://bugs.php.net/fix.php?id=81351&r=oldversion
Not developer issue:              https://bugs.php.net/fix.php?id=81351&r=support
Expected behavior:                https://bugs.php.net/fix.php?id=81351&r=notwrong
Not enough info:                  https://bugs.php.net/fix.php?id=81351&r=notenoughinfo
Submitted twice:                  https://bugs.php.net/fix.php?id=81351&r=submittedtwice
register_globals:                 https://bugs.php.net/fix.php?id=81351&r=globals
PHP version support discontinued: https://bugs.php.net/fix.php?id=81351&r=phptooold
Daylight Savings:                 https://bugs.php.net/fix.php?id=81351&r=dst
IIS Stability:                    https://bugs.php.net/fix.php?id=81351&r=isapi
Install GNU Sed:                  https://bugs.php.net/fix.php?id=81351&r=gnused
Floating point limitations:       https://bugs.php.net/fix.php?id=81351&r=float
No Zend Extensions:               https://bugs.php.net/fix.php?id=81351&r=nozend
MySQL Configuration Error:        https://bugs.php.net/fix.php?id=81351&r=mysqlcfg

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