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Adding custom permissions in Drupal 7

{ Posted 2nd July 2013 }

It is really easy to add a custom permission in Drupal 7, you only need to run one convientently titled hook: hook_permission(). Simply add this to your custom module.

/*** Implementation of hook_permission().*/function YOURMODULE_permission() {  // Add a custom permission.  return array(    'My great custom permission' => array(      'title' => t('Title of my great custom permission'),    ),  );}

This will add the permission to the permissions page (admin/people/permissions) and you can grant it to whichever roles you like. To test if a user has the permission you just need to call the user_access() function.

if (user_access('My great custom permission')) {  // Do some cool stuff here.}