Minor - adding comments.

main/inc/global.inc.php

@@ -117,7 +117,7 @@ if ($alreadyInstalled) {
     }*/
 
     // For backward compatibility.
-    $_configuration['dokeos_version'] = $_configuration['system_version'];
+    $_configuration['dokeos_version'] = isset($_configuration['system_version']) ? $_configuration['system_version'] : null;
     //$_configuration['dokeos_stable'] = $_configuration['system_stable'];
     $userPasswordCrypted = (!empty($_configuration['password_encryption']) ? $_configuration['password_encryption'] : 'sha1');
 }

main/inc/services.php

@@ -209,6 +209,11 @@ class ManagerRegistry extends AbstractManagerRegistry
         unset($this->container[$name]);
     }
 
+    /**
+     * @param string $alias
+     * @return string|void
+     * @throws BadMethodCallException
+     */
     public function getAliasNamespace($alias)
     {
         throw new \BadMethodCallException('Namespace aliases not supported.');

web/index.php

@@ -1,6 +1,9 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+/** Composer autoload */
+require_once __DIR__.'/../vendor/autoload.php';
+
 /**
  * Classic global.inc.php file now returns a Application object
  * Make sure you read the documentation/installation_guide.html to learn how
@@ -9,8 +12,6 @@
 /**
  * Inclusion of main setup script
  */
-require_once __DIR__.'/../vendor/autoload.php';
-
 $app = require_once '../main/inc/global.inc.php';
 
 /**
@@ -33,4 +34,3 @@ $app = require_once '../main/inc/global.inc.php';
 
 /** @var \Silex\Application $app */
 $app->run();
-//$app['http_cache']->run();