Development:Modules
From MoodleDocs
Activity modules reside in the 'mod' directory. Each module is in a separate subdirectory and consists of the following mandatory elements (plus extra scripts unique to each module):
- mod_form.php - a form to set up or update an instance of this module
- version.php - defines some meta-info
- icon.gif - a 16x16 icon for the module
- db/install.xml - defines the structure of db tables for all database types. Is used during module installation
- db/upgrade.php - defines changes in the structure of db tables. Is used during module upgrade
- db/access.php - defines module capabilities
- index.php - a page to list all instances in a course
- view.php - a page to view a particular instance
- lib.php - any/all functions defined by the module should be in here. If the modulename is called widget, then the required functions include:
- widget_install() - will be called during the installation of the module
- widget_add_instance() - code to add a new instance of widget
- widget_update_instance() - code to update an existing instance
- widget_delete_instance() - code to delete an instance
- widget_user_outline() - given an instance, return a summary of a user's contribution
- widget_user_complete() - given an instance, print details of a user's contribution
- Other functions available but not required are:
- widget_delete_course() - code to clean up anything that would be leftover after all instances are deleted
- widget_process_options() - code to pre-process the form data from module settings
- widget_reset_course_form() and widget_delete_userdata() - used to implement Reset course feature.
- To avoid possible conflict, any module functions should be named starting with widget_ and any constants you define should start with WIDGET_
- backuplib.php and restorelib.php (optional)
- settings.php - (optional) a form definition to set up or update global settings of this module
- lang/en_utf8/widget.php - (optional) Lastly, each module will have some language files that contain strings for that module.
IMPORTANT: When creating a new module, the new name of the module must not contain numbers or other special characters!
You need a db table with the same name as your module. This table must have at least three fields: id, course and name.
You should also make sure that your activity module provides appropriate support for groups and metacourses.
See also
- Tracker issue [https://tracker.moodle.org/browse/CONTRIB-52 CONTRIB-52 Improvements to make NEWMODULE really useful] - including download link for new module template supporting roles, formslib etc. (unfinished)
- http://download.moodle.org/plugins16/mod/NEWMODULE.zip - new module template for versions of Moodle prior to 1.7. Please follow the README instructions inside the zip.
- Using Moodle Activity modules forum
- Using Moodle forum discussions: A new resource type: where do I put the language strings?, New Module Template Code for Moodle 1.7, Third-party module backup