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?
asked Jan 28, 2016 at 9:09
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2 Answers
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
}
answered Oct 9, 2016 at 9:05
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3
\Drupal::moduleHandlerends 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.– GeorgeApr 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. Nov 16, 2020 at 7:11
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This is exactly the same as the code shown from the other answer, which is preferable when the
Drupalclass 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 ♦Nov 16, 2020 at 14:30
Like this:
if (\Drupal::moduleHandler()->moduleExists('devel')) {
answered Jan 28, 2016 at 9:09
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3It's worth nothing that injecting the
module_handlerservice would be preferable to using\Drupal(assuming it's an option in current context)– Clive ♦Jan 28, 2016 at 9:15 -
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2@ryrye Because you can mock injections in tests, see drupal.org/docs/8/api/services-and-dependency-injection/… Apr 30, 2020 at 9:26