27. Drupal Core templating Localization SEO Input formats Content management User management Url aliases Reports
28. Modules templating Localization SEO Input formats Content management User management Url aliases Reports Forum Private Messages User profile WYSIWYG Editor E commerce Event Calendar Image gallery Custom
29. Hook System Module_invoke_all(‘perm’) User Module Blog module function user_perm () { return array(‘access user profiles’); } function blog_perm () { return array('edit own blog'); } $permission = array(‘ access user profiles ’, ‘ edit own blog ’, . . . . );