Drupal 7 Module Development

}
Chapter 8
'page callback' => 'example_user_page',
'page arguments' => array(1),
'access callback' => 'example_user_access',
'access arguments' => array(1,
'view content creation permissions', 'administer users'),
'type' => MENU_LOCAL_TASK,
);
return $items;
/**
* Access callback that checks multiple permissions.
*/
function example_user_access() {
global $user;
$arguments = func_get_args();
$account = array_shift($arguments);
if ($account->uid != $user->uid) {
return FALSE;
}
foreach ($arguments as $permission) {
if (!user_access($permission)) {
return FALSE;
}
}
return TRUE;
}
In the preceding way, complex access rules may be enforced on menu callbacks.
When writing an access check outside of the menu system, it is tempting
to chain together a series of IF checks to produce the logic required.
Consider moving such statements into a clearly defined access function.
These can improve the readability and portability of your code. If you
want extra style points, consider adding a drupal_alter() function
before returning TRUE or FALSE to allow other modules to rewrite your
standard logic.
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