Can someone explain “access arguments” in Drupal?

Question

Can someone explain \"access arguments\" in Drupal? Trust me I have tried Googling it but I am just not getting a clear grasp.

Answer 1

Access arguments are the arguments passed to the function that checks if a user has access to a menu.

Given a menu callback definition as the following

  $items['blog/feed'] = array(
    'title' => 'RSS feed',
    'page callback' => 'blog_feed',
    'access callback' => 'custom_module_blog_access',
    'access arguments' => array('feed'),
    'type' => MENU_CALLBACK,
  );

The function custom_module_blog_access() will be called as custom_module_blog_access('feed'). If the function returns TRUE, then the user will be given access to the menu callback; differently, the user will see the error 403 page (access denied). Normally, the access callback is not defined, and by default Drupal will use user_access().