function user_access in Drupal 6

Same name and namespace in other branches

1. 4 modules/user.module \user_access()
2. 5 modules/user/user.module \user_access()
3. 7 modules/user/user.module \user_access()

Determine whether the user has a given privilege.

Parameters

$string: The permission, such as "administer nodes", being checked for.

$account: (optional) The account to check, if not given use currently logged in user.

$reset: (optional) Resets the user's permissions cache, which will result in a recalculation of the user's permissions. This is necessary to support dynamically added user roles.

Return value

Boolean TRUE if the current user has the requested permission.

All permission checks in Drupal should go through this function. This way, we guarantee consistent behavior, and ensure that the superuser can perform all actions.

115 calls to user_access()

aggregator_block in modules/aggregator/aggregator.module

Implementation of hook_block().

aggregator_categorize_items_validate in modules/aggregator/aggregator.pages.inc

Validate aggregator_categorize_items form submissions.

block_admin_configure in modules/block/block.admin.inc

Menu callback; displays the block configuration form.

blogapi_blogger_edit_post in modules/blogapi/blogapi.module

Blogging API callback. Modifies the specified blog node.

blogapi_blogger_new_post in modules/blogapi/blogapi.module

Blogging API callback. Inserts a new blog post as a node.

... See full list

6 string references to 'user_access'

aggregator_menu in modules/aggregator/aggregator.module

Implementation of hook_menu().

menu_menu in modules/menu/menu.module

Implementation of hook_menu().

statistics_menu in modules/statistics/statistics.module

Implementation of hook_menu().

user_menu in modules/user/user.module

Implementation of hook_menu().

_menu_check_access in includes/menu.inc

Check access to a menu item using the access callback

... See full list

File

modules/user/user.module, line 511

Enables the user registration and login system.

Code

function user_access($string, $account = NULL, $reset = FALSE) {
  global $user;
  static $perm = array();
  if ($reset) {
    $perm = array();
  }
  if (!isset($account)) {
    $account = $user;
  }

  // User #1 has all privileges:
  if ($account->uid == 1) {
    return TRUE;
  }

  // To reduce the number of SQL queries, we cache the user's permissions
  // in a static variable.
  if (!isset($perm[$account->uid])) {
    $result = db_query("SELECT p.perm FROM {role} r INNER JOIN {permission} p ON p.rid = r.rid WHERE r.rid IN (" . db_placeholders($account->roles) . ")", array_keys($account->roles));
    $perms = array();
    while ($row = db_fetch_object($result)) {
      $perms += array_flip(explode(', ', $row->perm));
    }
    $perm[$account->uid] = $perms;
  }
  return isset($perm[$account->uid][$string]);
}