hook_access

Define access restrictions.

This hook allows node modules to limit access to the node types they define.

Parameters

$op: The operation to be performed. Possible values:

• "create"
• "delete"
• "update"
• "view"

$node: The node on which the operation is to be performed, or, if it does not yet exist, the type of node to be created.

Return value

TRUE if the operation may be performed; FALSE if the operation may not be returned; NULL to not override the settings in the node_access table.

The administrative account (user ID #1) always passes any access check, so this hook is not called in that case. If this hook is not defined for a node type, all access checks will fail, so only the administrator will be able to see content of that type. However, users with the "administer nodes" permission may always view and edit content through the administrative interface.

For a detailed usage example, see node_example.module.

Related topics

Node access rights

The node access system determines who can do what to which nodes.

Hooks

Allow modules to interact with the Drupal core.

File

developer/hooks/node.php, line 79

These hooks are defined by node modules, modules that define a new kind of node.

Code

<?php
function hook_access($op, $node) {
  global $user;

  if ($op == 'create') {
    return user_access('create stories');
  }

  if ($op == 'update' || $op == 'delete') {
    if (user_access('edit own stories') && ($user->uid == $node->uid)) {
      return TRUE;
    }
  }
}
?>