Provides a parser function to generate diagrams and flowcharts with the help of the mermaid script language

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1.0.1 2018-02-13 12:15 UTC


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This extension provides the #mermaid parser function to support the generation of diagrams and flowcharts with the help of the mermaid script language. Supported diagram forms include:

  • Flowchart
  • Sequence diagram
  • Gantt diagram


  • PHP 5.6 or later
  • MediaWiki 1.27 or later


The recommended way to install Mermaid is by using Composer with an entry in MediaWiki's "composer.json" file or preferably "composer.local.json" file.

	"require": {
		"mediawiki/mermaid": "~1.0"
  1. From your MediaWiki installation directory, execute composer require mediawiki/mermaid:~1.0
  2. Add wfLoadExtension( 'Mermaid' ); to the "LocalSettings.php" file
  3. Navigate to Special:Version on your wiki and verify that the package have been successfully installed.


The #mermaid parser function allows to add mermaid typed content to a wiki article. For example, copying examples is as easy as:

participant Alice
participant Bob
  Alice->John: Hello John, how are you?
  loop Healthcheck
       John->John: Fight against hypochondria
  Note right of John: Rational thoughts <br/>prevail...
    John-->Alice: Great!
    John->Bob: How about you?
    Bob-->John: Jolly good!


Contribution and support

If you want to contribute work to the project please subscribe to the developers mailing list and have a look at the contribution guideline.


This extension provides unit and integration tests that are run by a continues integration platform but can also be executed using composer phpunit from the extension base directory.


GNU General Public License, version 2 or later.