[gravitypdf-bot]

GitHub's ubuntu-latest is now ubuntu-26.04, which ships libxml2 2.15. Since 2.14, libxml2's HTML tokenizer follows HTML5:

• <?php ... ?> is read as a bogus comment (<!--?php ... ?-->), not a processing instruction
• loadHTML() no longer reports parse errors, even for invalid bytes or undefined entities

That broke 18 Issue65Test tests and DOMQueryTest::testFailedParseHTMLElement (27 failures, 1 error). Neither can apply on the new parser: there is no processing instruction to normalise, and no error to turn into a ParseException.

Changes

• TestCase::libxmlParsesHtmlAsHtml5() probes the parser once and caches the result. It doesn't read LIBXML_VERSION, because that is the libxml PHP was built against, not necessarily the one it runs with. requireLegacyHtmlParser() skips on it.
• The six issue Processing instructions gain an extra "?" when an HTML-parsed document is serialized with html()/innerHTML() #65 tests that work on any libxml move to Issue65ParserIndependentTest, so Issue65Test skips once in set_up().
• A new test checks that the comment libxml 2.14+ produces round trips unchanged.
• The PHP 8.3 coverage job runs on ubuntu-24.04, so CI still runs the issue Processing instructions gain an extra "?" when an HTML-parsed document is serialized with html()/innerHTML() #65 fix and Codecov still sees it. The old include: - php: '8.3' added a key the matrix doesn't have, which applied report: true to every job; coverage now runs on 8.3 only.
• actions/checkout v6 → v7 and codecov/codecov-action v5 → v7. checkout v7 only changes pull_request_target/workflow_run, which aren't used here. The codecov directory and token inputs are unchanged.
• The CHANGELOG notes the user-visible libxml2 2.14+ behaviour of htmlqp().

Testing

• libxml2 2.15.2 (ubuntu:26.04 container): 395 tests, 30 skipped, 0 failures
• libxml2 2.9.13 (local): 395 tests, 3 skipped, as before
• composer run lint and composer run lint:min-php are clean

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.84%. Comparing base (745a4e2) to head (7ffe1aa).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #90      +/-   ##
============================================
- Coverage     90.18%   89.84%   -0.35%     
+ Complexity     1433     1430       -3     
============================================
  Files            26       26              
  Lines          3219     3189      -30     
============================================
- Hits           2903     2865      -38     
- Misses          316      324       +8     

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