+ if ($doExpensiveQueries && !wfRunHooks( 'getUserPermissionsErrorsExpensive', array( &$this, &$user, $action, &$result ) ) ) {
+ if ($result != array() && is_array($result) && !is_array($result[0]))
+ $errors[] = $result; # A single array representing an error
+ else if (is_array($result) && is_array($result[0]))
+ $errors = array_merge( $errors, $result ); # A nested array representing multiple errors
+ else if ($result != '' && $result != null && $result !== true && $result !== false)
+ $errors[] = array($result); # A string representing a message-id
+ else if ($result === false )
+ $errors[] = array('badaccess-group0'); # a generic "We don't want them to do that"
+ }