diff -r 2398420f48e7 -r 979d99a0b00e install/upgrade.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/install/upgrade.php	Fri Jan 18 10:47:24 2008 -0500
@@ -0,0 +1,75 @@
+<?php
+
+/*
+ * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
+ * Version 1.1.1
+ * Copyright (C) 2006-2007 Dan Fuhry
+ * Installation package
+ * upgrade.php - Upgrade interface
+ *
+ * This program is Free Software; you can redistribute 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 details.
+ */
+
+define('IN_ENANO', 1);
+
+require_once('includes/common.php');
+@ini_set('display_errors', 'on');
+
+$ui = new Enano_Installer_UI('Enano upgrader', false);
+if ( version_compare(PHP_VERSION, '5.0.0', '<') )
+{
+  $ui->__construct('Enano upgrader', false);
+}
+$ui->add_stage('Welcome', true);
+$ui->add_stage('Select version', true);
+$ui->add_stage('Perform upgrade', true);
+$ui->add_stage('Finish', true);
+$stg_php4 = $ui->add_stage('PHP4 compatibility notice', false);
+
+if ( version_compare(PHP_VERSION, '5.0.0', '<') || isset($_GET['debug_warn_php4']) )
+{
+  $ui->set_visible_stage($stg_php4);
+  $ui->step = '';
+  
+  $ui->show_header();
+  
+  // This isn't localized because all localization code is dependent on
+  // PHP 5 (loading lang.php will throw a parser error under PHP4). This
+  // one message probably doesn't need to be localized anyway.
+  
+  ?>
+  <h2 class="heading-error">
+    Your server doesn't have support for PHP 5.
+  </h2>
+  <p>
+    PHP 5 is the latest version of the language on which Enano was built. Its many new features have been available since early 2004, yet
+    many web hosts have not migrated to it because of the work involved. In 2007, Zend Corporation announced that support for the aging
+    PHP 4.x would be discontinued at the end of the year. An initiative called <a href="http://gophp5.org/">GoPHP5</a> was started to
+    encourage web hosts to migrate to PHP 5.
+  </p>
+  <p>
+    Because of the industry's decision to not support PHP 4 any longer, the Enano team decided that it was time to begin using the powerful
+    features of PHP 5 at the expense of PHP 4 compatibility. Therefore, this version of Enano cannot be installed on your server until it
+    is upgraded to at least PHP 5.0.0, and preferably the latest available version.
+    <!-- No, not even removing the check in this installer script will help. As soon as the PHP4 check is passed, the installer shows the
+         language selection page, after which the language code is loaded. The language code and libjson2 will trigger parse errors under
+         PHP <5.0.0. -->
+  </p>
+  <p>
+    If you need to use Enano but can't upgrade your PHP because you're on a shared or reseller hosting service, you can use the
+    <a href="http://enanocms.org/download?series=1.0">1.0.x series of Enano</a> on your site. While the Enano team attempts to make this
+    older series work on PHP 4, official support is not provided for installations of Enano on PHP 4.
+  </p>
+  <?php
+  
+  $ui->show_footer();
+  exit(0);
+}
+
+$ui->show_header();
+$ui->show_footer();
+