1 install.inc backdrop_uninstall_modules($module_list = array(), $uninstall_dependents = TRUE)

Uninstalls a given list of disabled modules.


array $module_list: The modules to uninstall. It is the caller's responsibility to ensure that all modules in this list have already been disabled before this function is called.

bool $uninstall_dependents: (optional) If TRUE, the function will check that all modules which depend on the passed-in module list either are already uninstalled or contained in the list, and it will ensure that the modules are uninstalled in the correct order. This incurs a significant performance cost, so use FALSE if you know $module_list is already complete and in the correct order. Defaults to TRUE.

Return value

bool Returns TRUE if the operation succeeds or FALSE if it aborts due to an unsafe condition, namely, $uninstall_dependents is TRUE and a module in $module_list has dependents which are not already uninstalled and not also included in $module_list).

See also




core/includes/install.inc, line 1006
API functions for installing modules and themes.


function backdrop_uninstall_modules($module_list = array(), $uninstall_dependents = TRUE) {
  if ($uninstall_dependents) {
    // Get all module data so we can find dependents and sort.
    $module_data = system_rebuild_module_data();
    // Create an associative array with weights as values.
    $module_list = array_flip(array_values($module_list));

    $profile = backdrop_get_profile();
    foreach (array_keys($module_list) as $module) {
      if (!isset($module_data[$module]) || backdrop_get_installed_schema_version($module) == SCHEMA_UNINSTALLED) {
        // This module doesn't exist or is already uninstalled. Skip it.
      $module_list[$module] = $module_data[$module]->sort;

      // If the module has any dependents which are not already uninstalled and
      // not included in the passed-in list, abort. It is not safe to uninstall
      // them automatically because uninstalling a module is a destructive
      // operation.
      foreach (array_keys($module_data[$module]->required_by) as $dependent) {
        if (!isset($module_list[$dependent]) && backdrop_get_installed_schema_version($dependent) != SCHEMA_UNINSTALLED && $dependent != $profile) {
          return FALSE;

    // Sort the module list by pre-calculated weights.
    $module_list = array_keys($module_list);

  foreach ($module_list as $module) {
    // Uninstall the module.
    module_invoke($module, 'uninstall');

    watchdog('system', '%module module uninstalled.', array('%module' => $module), WATCHDOG_INFO);
    backdrop_set_installed_schema_version($module, SCHEMA_UNINSTALLED);

  if (!empty($module_list)) {
    // Let other modules react.
    module_invoke_all('modules_uninstalled', $module_list);

  return TRUE;