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Request #68325 LIBXML_PARSEHUGE cannot be set for xml_parser_create
Submitted: 2014-10-29 17:13 UTC Modified: 2023-10-22 14:45 UTC
Votes:28
Avg. Score:4.5 ± 0.8
Reproduced:25 of 25 (100.0%)
Same Version:4 (16.0%)
Same OS:6 (24.0%)
From: pdx at pdx dot hu Assigned: nielsdos (profile)
Status: Closed Package: XML related
PHP Version: 5.4.34 OS: CentOS
Private report: No CVE-ID: None
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 [2014-10-29 17:13 UTC] pdx at pdx dot hu 
Description:
------------
---
From manual page: http://www.php.net/function.xml-parser-set-option
---

Short story: since LibXML>2.7.6 larger xml chunks must be explicitly allowed by setting LIBXML_PARSEHUGE for libxml. There is no option to do that with xml_parser_set_option. And believe me, xml_parser indeed chokes on most of what I throw at it.

Please see this discussion at http://stackoverflow.com/questions/25042325/sax-parser-php-no-memory-at-line-x .

The version is actually 5.4.33 (the latest available 5.4 branch on Remi's CentOS packages), but from the documentation it's clear that it hasn't been dealt with yet.

Also, bug#65604 https://bugs.php.net/bug.php?id=65604&edit=2 deals with the same source of problem, but there has been no fix as of yet.

Test script:
---------------
not necessary.

Expected result:
----------------
correct XML parsing as before.

Actual result:
--------------
XML error: No memory at line XX (various).

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 [2018-04-02 00:12 UTC] cmb@php.net 
FWIW: it is possible to parse large XML documents in chunks; a
respective example has been added to the manual[1].  With this
technique, processing psd7003.xml[2] worked without problems.

[1] <http://svn.php.net/viewvc?view=revision&revision=344608>
[2] <http://aiweb.cs.washington.edu/research/projects/xmltk/xmldata/www/repository.html#pir>
 [2023-10-22 14:45 UTC] nielsdos@php.net
-Status: Open +Status: Closed -Assigned To: +Assigned To: nielsdos
 [2023-10-22 14:45 UTC] nielsdos@php.net 
The fix for this bug has been committed.
If you are still experiencing this bug, try to check out latest source from https://github.com/php/php-src and re-test.
Thank you for the report, and for helping us make PHP better.

Implemented for 8.4-dev
 
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