diff --git a/lib/customcheckslib.php b/lib/customcheckslib.php
new file mode 100644
index 0000000000000..38c36f59f398b
--- /dev/null
+++ b/lib/customcheckslib.php
@@ -0,0 +1,49 @@
+<?php  //$Id$
+
+///////////////////////////////////////////////////////////////////////////
+//                                                                       //
+// NOTICE OF COPYRIGHT                                                   //
+//                                                                       //
+// Moodle - Modular Object-Oriented Dynamic Learning Environment         //
+//          http://moodle.com                                            //
+//                                                                       //
+// Copyright (C) 1999 onwards Martin Dougiamas     http://dougiamas.com  //
+//           (C) 2001-3001 Eloy Lafuente (stronk7) http://contiento.com  //
+//                                                                       //
+// This program is free software; you can redistribute it and/or modify  //
+// it under the terms of the GNU General Public License as published by  //
+// the Free Software Foundation; either version 2 of the License, or     //
+// (at your option) any later version.                                   //
+//                                                                       //
+// This program is distributed in the hope that it will be useful,       //
+// but WITHOUT ANY WARRANTY; without even the implied warranty of        //
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         //
+// GNU General Public License for more details:                          //
+//                                                                       //
+//          http://www.gnu.org/copyleft/gpl.html                         //
+//                                                                       //
+///////////////////////////////////////////////////////////////////////////
+
+/// This library contains a collection of functions able to perform
+/// some custom checks executed by environmental tests (automatically
+/// executed on install & upgrade and under petition in the admin block).
+///
+/// Any function in this library must return:
+/// - null: if the test isn't relevant and must not be showed (ignored)
+/// - environment_results object with the status set to:
+///     - true: if passed
+///     - false: if failed
+
+/**
+ * This function will look for some risky PHP settings combinations
+ * in order to inform about.
+ *
+ * @param $result the environment_results object to be modified
+ * @return mixed null if the test is irrelevant or environment_results object with
+ *               status set to true (test passed) or false (test failed)
+ */
+function php_check_register_globals_and_fopen($result) {
+    return null;
+}
+
+?>