Call to undefined method mathTagHook()

[Subilan]

With Math enabled, if I save the page with $$ section in <markdown>, the page will be like this:

[cc9dd1222bfb599d83029366] /index.php?title=%E6%96%87%E6%9C%AC%E6%A0%B7%E5%BC%8F%E7%A4%BA%E4%BE%8B&action=submit Error: Call to undefined method MediaWiki\Extension\Math\Hooks::mathTagHook()

Backtrace:

from /home/wwwroot/wiki/extensions/WikiMarkdown/includes/WikiMarkdown.php(155)
#0 [internal function]: WikiMarkdown::{closure}()
#1 /home/wwwroot/wiki/extensions/WikiMarkdown/includes/WikiMarkdown.php(157): preg_replace_callback()
#2 /home/wwwroot/wiki/includes/parser/Parser.php(3979): WikiMarkdown::parserHook()
#3 /home/wwwroot/wiki/includes/parser/PPFrame_Hash.php(353): Parser->extensionSubstitution()
#4 /home/wwwroot/wiki/includes/parser/Parser.php(2932): PPFrame_Hash->expand()
#5 /home/wwwroot/wiki/includes/parser/Parser.php(1579): Parser->replaceVariables()
#6 /home/wwwroot/wiki/includes/parser/Parser.php(697): Parser->internalParse()
#7 /home/wwwroot/wiki/includes/content/WikitextContentHandler.php(294): Parser->parse()
#8 /home/wwwroot/wiki/includes/content/ContentHandler.php(1705): WikitextContentHandler->fillParserOutput()
#9 /home/wwwroot/wiki/includes/content/Renderer/ContentRenderer.php(47): ContentHandler->getParserOutput()
#10 /home/wwwroot/wiki/includes/EditPage.php(4254): MediaWiki\Content\Renderer\ContentRenderer->getParserOutput()
#11 /home/wwwroot/wiki/includes/EditPage.php(4157): EditPage->doPreviewParse()
#12 /home/wwwroot/wiki/includes/EditPage.php(2926): EditPage->getPreviewText()
#13 /home/wwwroot/wiki/includes/EditPage.php(728): EditPage->showEditForm()
#14 /home/wwwroot/wiki/includes/actions/EditAction.php(71): EditPage->edit()
#15 /home/wwwroot/wiki/includes/actions/SubmitAction.php(38): EditAction->show()
#16 /home/wwwroot/wiki/includes/MediaWiki.php(543): SubmitAction->show()
#17 /home/wwwroot/wiki/includes/MediaWiki.php(321): MediaWiki->performAction()
#18 /home/wwwroot/wiki/includes/MediaWiki.php(912): MediaWiki->performRequest()
#19 /home/wwwroot/wiki/includes/MediaWiki.php(563): MediaWiki->main()
#20 /home/wwwroot/wiki/index.php(53): MediaWiki->run()
#21 /home/wwwroot/wiki/index.php(46): wfIndexMain()
#22 {main}

Is it caused by some version mismatch? I'm currently using

• MediaWiki 1.38.4
• PHP 7.4.30
• WikiMarkdown 1.1.3 (642e707) 2022-08-15
• Math 3.0.0
• SyntaxHighlight 2.0 (it works fine with markdown)
• benjaminhoegh/parsedown-extended 1.1.2
• erusev/parsedown 1.8.0b7
• erusev/parsedown-extra 0.8.1

[kuenzign]

Can you confirm that using the Math extension normally (not within markdown) works properly?

[kuenzign]

Additionally, I've tested this extension with Math 3.0.0 (4e8cc52) on MediaWiki 1.35.8 (latest LTS release) and there is no issue. It looks like the Math extension has had some refactoring, which would make certain versions incompatible (much like what you are seeing). Please try using the 4e8cc52 version of Math and see if that works for you. Once the next LTS release of MediaWiki is stable (1.39), I'll look into making changes to support whatever version of Math comes with that version.

[Subilan]

I'll look into making changes to support whatever version of Math comes with that version.

OK, I get it.

Can you confirm that using the Math extension normally (not within markdown) works properly?

It works normally without markdown. I'll disable math section in markdown for a simple fix as this is actually not a big issue for me though XD

Thanks for your help!

[kuenzign]

You might also be able to apply a simple hack to your version of WikiMarkdown by changing lines 130, 138, 146, and 155 to have MediaWiki\Extension\Math\HookHandlers instead of MediaWiki\Extension\Math\Hooks. I won't make this change here yet since that will break 1.35 compatibility and I mainly support MediaWiki LTS releases, but I'll likely need to make that change when MediaWiki 1.39 is released.

[Subilan]

Pretty cool solution, I'll try it later. Thanks!

[Podolyakofs]

to fix #6
in 1.41 construct function changes to

public function __construct(
--
   RendererFactory $rendererFactory,
   UserOptionsLookup $userOptionsLookup,
   HookContainer $hookContainer
   ) {
   $this->rendererFactory = $rendererFactory;
   $this->userOptionsLookup = $userOptionsLookup;
   $this->hookRunner = new HookRunner( $hookContainer );
   }

so need some fix to 3 arg in

	$hookHandler = new \MediaWiki\Extension\Math\HookHandlers\ParserHooksHandler(
				MediaWiki\MediaWikiServices::getInstance()->getService( 'Math.RendererFactory' ),
				MediaWiki\MediaWikiServices::getInstance()->getService( 'UserOptionsLookup' )
			);

[dcbradley]

This is probably not the right way to do it, but it works in 1.39:

--- includes/WikiMarkdown.php.orig	2026-05-07 10:54:43.085226414 -0500
+++ includes/WikiMarkdown.php	2026-05-07 13:57:49.234098701 -0500
@@ -127,7 +127,12 @@ class WikiMarkdown {
 				'/(?<!\\\\)\\\\\[(.*)(?<!\\\\)\\\\\]/isU',
 				function ( $matches ) use ( &$parser ) {
 					$args = array('display' => 'block');
-					return MediaWiki\Extension\Math\Hooks::mathTagHook( html_entity_decode( $matches[1] ), $args, $parser );
+					$params = array();
+					$params['name'] = 'math';
+					$params['inner'] = html_entity_decode( $matches[1] );
+					$params['attributes'] = $args;
+					$frame = $parser->getPreprocessor()->newFrame();
+					return $parser->extensionSubstitution($params,$frame);
 				},
 				$out
 			);
@@ -135,7 +140,12 @@ class WikiMarkdown {
 				'/(?<!\\\\)\$\$(.*)(?<!\\\\)\$\$/isU',
 				function ( $matches ) use ( &$parser ) {
 					$args = array('display' => 'block');
-					return MediaWiki\Extension\Math\Hooks::mathTagHook( html_entity_decode( $matches[1] ), $args, $parser );
+					$params = array();
+					$params['name'] = 'math';
+					$params['inner'] = html_entity_decode( $matches[1] );
+					$params['attributes'] = $args;
+					$frame = $parser->getPreprocessor()->newFrame();
+					return $parser->extensionSubstitution($params,$frame);
 				},
 				$out
 			);
@@ -143,7 +153,12 @@ class WikiMarkdown {
 				'/(?<!\\\\)\\\\\((.*)(?<!\\\\)\\\\\)/isU',
 				function ( $matches ) use ( &$parser ) {
 					$args = array('display' => 'inline');
-					return MediaWiki\Extension\Math\Hooks::mathTagHook( html_entity_decode( $matches[1] ), $args, $parser );
+					$params = array();
+					$params['name'] = 'math';
+					$params['inner'] = html_entity_decode( $matches[1] );
+					$params['attributes'] = $args;
+					$frame = $parser->getPreprocessor()->newFrame();
+					return $parser->extensionSubstitution($params,$frame);
 				},
 				$out
 			);
@@ -152,7 +167,12 @@ class WikiMarkdown {
 					'/(?<!\\\\)\$(.*)(?<!\\\\)\$/isU',
 					function ( $matches ) use ( &$parser ) {
 						$args = array('display' => 'inline');
-						return MediaWiki\Extension\Math\Hooks::mathTagHook( html_entity_decode( $matches[1] ), $args, $parser );
+						$params = array();
+						$params['name'] = 'math';
+						$params['inner'] = html_entity_decode( $matches[1] );
+						$params['attributes'] = $args;
+						$frame = $parser->getPreprocessor()->newFrame();
+						return $parser->extensionSubstitution($params,$frame);
 					},
 					$out
 				);