replace or by ||

The or operator does not have the same precedence as ||. This could
lead to unexpected behavior, use || instead.

Author: Tjoosten

application/libraries/REST_Controller.php

@@ -1474,7 +1474,7 @@ protected function _prepare_digest_auth()
 
         // For digest authentication the library function should return already stored md5(username:restrealm:password) for that username @see rest.php::auth_library_function config
         $A1 = $this->_check_login($digest['username'], TRUE);
-        if ( ! array_key_exists('username', $digest) or ! $A1 ) {
+        if ( ! array_key_exists('username', $digest) || ! $A1 ) {
             $this->_force_login($uniqid);
         }