Same name and namespace in other branches
- 4.6.x modules/user.module \user_access()
- 4.7.x modules/user.module \user_access()
- 6.x modules/user/user.module \user_access()
- 7.x 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.
$account: (optional) The account to check, if not given use currently logged in user.
Return value
boolean TRUE if the current user has the requested permission.
All permission checks in Drupal should go through this function. This way, we guarantee consistent behavior, and ensure that the superuser can perform all actions.
50 calls to user_access()
- aggregator_menu in modules/
aggregator/ aggregator.module - Implementation of hook_menu().
- block_admin_configure in modules/
block/ block.module - Menu callback; displays the block configuration form.
- block_menu in modules/
block/ block.module - Implementation of hook_menu().
- blogapi_menu in modules/
blogapi/ blogapi.module - blog_access in modules/
blog/ blog.module - Implementation of hook_access().
File
- modules/
user/ user.module, line 361 - Enables the user registration and login system.
Code
function user_access($string, $account = NULL) {
global $user;
static $perm = array();
if (is_null($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])) {
$rids = array_keys($account->roles);
$placeholders = implode(',', array_fill(0, count($rids), '%d'));
$result = db_query("SELECT DISTINCT(p.perm) FROM {role} r INNER JOIN {permission} p ON p.rid = r.rid WHERE r.rid IN ({$placeholders})", $rids);
$perm[$account->uid] = '';
while ($row = db_fetch_object($result)) {
$perm[$account->uid] .= "{$row->perm}, ";
}
}
if (isset($perm[$account->uid])) {
return strpos($perm[$account->uid], "{$string}, ") !== FALSE;
}
return FALSE;
}