hook_uninstall

Remove any information that the module sets.

The information that the module should remove includes:

• variables that the module has set using variable_set() or system_settings_form()
• modifications to existing tables

The module should not remove its entry from the {system} table. Database tables defined by hook_schema() will be removed automatically.

The uninstall hook must be implemented in the module's .install file. It will fire when the module gets uninstalled but before the module's database tables are removed, allowing your module to query its own tables during this routine.

When hook_uninstall() is called, your module will already be disabled, so its .module file will not be automatically included. If you need to call API functions from your .module file in this hook, use drupal_load() to make them available. (Keep this usage to a minimum, though, especially when calling API functions that invoke hooks, or API functions from modules listed as dependencies, since these may not be available or work as expected when the module is disabled.)

See also

hook_install()

hook_schema()

hook_disable()

hook_modules_uninstalled()

Related topics

Hooks

Allow modules to interact with the Drupal core.

22 functions implement hook_uninstall()

1 invocation of hook_uninstall()

File

modules/system/system.api.php, line 3433

Hooks provided by Drupal core and the System module.

Code

function hook_uninstall() {
  variable_del('upload_file_types');
}