In Drupal 7, you can use module_exists() to check whether a module is enabled (as well as whether it exists).

For example,

if (module_exists('devel')) {

How can you check whether a module is enabled in Drupal 8?


2 Answers 2


Just like Clive mention....

injecting the module_handlerservice would be preferable to using \Drupal (assuming it's an option in current context)

Here is an example of checking if a module is enabled using a service (without injecting it).

$moduleHandler = \Drupal::service('module_handler');
if ($moduleHandler->moduleExists('devel')) {
  // Code Here
  • 3
    \Drupal::moduleHandler ends up just making an equivalent call to get the "module_handler" service anyway (see the moduleHandler doco). The key word in Clives comment was injecting, i.e. passing the service to a constructor.
    – George
    Commented Apr 12, 2018 at 1:10
  • Even though this is not an injection, this code is probably the best you can have if running in a hook_update_nnn() function in your module's .install file, as there's no way of injecting services in a functional context. Commented Nov 16, 2020 at 7:11
  • This is exactly the same as the code shown from the other answer, which is preferable when the Drupal class has an helper method. If a hook is only using a service, I would not use injection; in the case the services are more than one, it's possible to write code that uses injection, via a class.
    – apaderno
    Commented Nov 16, 2020 at 14:30

Like this:

  if (\Drupal::moduleHandler()->moduleExists('devel')) {
  • 3
    It's worth nothing that injecting the module_handler service would be preferable to using \Drupal (assuming it's an option in current context)
    – Clive
    Commented Jan 28, 2016 at 9:15
  • @Clive why is that preferable?
    – ryrye
    Commented Jan 8, 2020 at 19:13
  • 2
    @ryrye Because you can mock injections in tests, see drupal.org/docs/8/api/services-and-dependency-injection/… Commented Apr 30, 2020 at 9:26

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