Drupal 7 hook menu validating argument from url
To avoid duplicating code that converts this ID into it's corresponding object, Drupal support autoloading for "named" wildcards.When a named wildcard is used, Drupal will check for a function with the same name as the wildcard, suffixed by is necessary to make the simple example above viewable at all, but it's hardly ideal, as it allows no control what so ever.Enable the module, and go to /hello on your website. In the example below, this means the 0 will be turned into 'hello', as that's the first, and only, part of the URL. Often a URL argument will be the ID-number of something, such as an entity. If an integer is used as an argument it will represent a part of the URL, starting from 0, incremented once for each slash (/). In particular, you may want to read about permissions, as the page above will be viewable by . Below follows various more advanced topics regarding hook_menu.
In Drupal 7, it seems to be enough to clear all caches (you may have to run cron as well). I won’t get into the complexities of the routing system.