case 4:

            $content .= "<div class='admin-message'>\n";

            $content .= "<p>Several changes will be made to the database.</p>\n";

            $content .= "<div class='alert alert-warning'></i>We strongly recommend that you make a <a target='_blank' href='db_backup.php".$aidlink."'>Database Backup</a> before proceeding!</div>\n";

            $content .= "</div>\n";

            $disabled = FALSE; // true to disable.

            $content .= "<input type='hidden' name='stage' value='".($disabled ? 5 : 4)."'>\n";

            $content .= "<input type='submit' name='upgrade_database' value='Upgrade Database' class='button btn btn-primary'><br /><br />\n";

            if (!$disabled && isset($_POST['upgrade_database'])) {

               // @todo: upgrade package shall be rolled out automatically

               include "upgrade/upgrade-7.02-9.00.php";

               dbquery("UPDATE ".DB_SETTINGS." SET settings_value='9.00.00' WHERE settings_name='version'");

               echo "<div class='admin-message'>The database was upgraded.</div>";

               redirect(FUSION_SELF.$aidlink."&amp;upgrade_ok");

            }

            break;

[Fri Dec 25 06:31:53.946919 2015] [:error] [pid 5630] [client 192.168.51.8:51491] PHP Fatal error:  Class 'PHPFusion\\Database\\DatabaseFactory' not found in /var/www/html/includes/core_resources_include.php on line 40, referer: http://dev.amateurwriting.net/administration/index.php?aid=4b9ae0e3fbca1f0f&pagenum=3

Package php-pdo-5.4.16-36.el7_1.x86_64 already installed and latest version

[Fri Dec 25 06:31:53.946919 2015] [:error] [pid 5630] [client 192.168.51.8:51491] PHP Fatal error:  Class 'PHPFusion\\Database\\DatabaseFactory' not found in /var/www/html/includes/core_resources_include.php on line 40, referer: http://dev.amateurwriting.net/administration/in...;pagenum=3

Requirements for this version

- PHP 5.3 or higher

- MySQL 4.1 or higher

Fatal error: Class 'PHPFusion\OutputHandler' not found in /var/www/html/install/setup_includes.php on line 37

$fusion_page_head_tags = &\PHPFusion\OutputHandler::$pageHeadTags;

[root@upgradetest includes]# php -a

Interactive shell

php > echo is_file("/var/www/html/includes/autoloader.php");

1

php > $path = str_replace('\\', DIRECTORY_SEPARATOR, 'PHPFusion\OutputHandler');

php > $fullPath = $baseDir.$path.'.php';

php > echo $fullPath;

/var/www/newinstall/includes/classes/PHPFusion/OutputHandler.php

php > echo is_file($fullPath);

1

So it seems to me that the path is not the issue, as this is what I would expect it to return. It seems more like autoloader is not being called.

<?php

/*-------------------------------------------------------+

| PHP-Fusion Content Management System

| Copyright (C) PHP-Fusion Inc

| https://www.php-fusion.co.uk/

+--------------------------------------------------------*

| Filename: install/index.php

| Author: PHP-Fusion Development Team

+--------------------------------------------------------+

| This program is released as free software under the

| Affero GPL license. You can redistribute it and/or

| modify it under the terms of this license which you

| can read by viewing the included agpl.txt or online

| at www.gnu.org/licenses/agpl.html. Removal of this

| copyright header is strictly prohibited without

| written permission from the original author(s).

+--------------------------------------------------------*/

define("IN_FUSION", TRUE);

use PHPFusion\Database\DatabaseFactory;

use PHPFusion\Authenticate;



ini_set('display_errors', 1);

define('BASEDIR', '../');

require_once 'setup_includes.php';

[root@upgradetest install]# php -a

Interactive shell



php > 

php > define("IN_FUSION", TRUE);

php > 

php > use PHPFusion\Database\DatabaseFactory;

php > 

php > use PHPFusion\Authenticate;

php > ini_set('display_errors', 1);

php > 

php > define('BASEDIR', '../');

php > 

php > require_once 'setup_includes.php';

PHP Notice:  Undefined index: REMOTE_ADDR in /var/www/newinstall/includes/core_constants_include.php on line 44



Notice: Undefined index: REMOTE_ADDR in /var/www/newinstall/includes/core_constants_include.php on line 44

PHP Notice:  Undefined index: REMOTE_ADDR in /var/www/newinstall/includes/core_constants_include.php on line 46



Notice: Undefined index: REMOTE_ADDR in /var/www/newinstall/includes/core_constants_include.php on line 46

php > exit

spl_autoload_register(function ($className) {

   $baseDir = $_SERVER['DOCUMENT_ROOT'].'/includes/classes/';

   $path = str_replace('\\', DIRECTORY_SEPARATOR, $className);

   $fullPath = $baseDir.$path.'.php';

   if (is_readable($fullPath)) {

      require $fullPath;

   }

});

/*

 * Autoloader for compatibility reason

 *

 * It loads only classes from ClassName.class.php in global namespace

 */

spl_autoload_register(function ($className) {

   if (strpos($className, '\\') !== FALSE) {

      return;

   }

   $baseDir = $_SERVER['DOCUMENT_ROOT'].'/includes/classes/';

   $fullPath = $baseDir.$className.'.class.php';

   if (is_readable($fullPath)) {

      require $fullPath;

   }

});