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 1011
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;