Tighten up code: remove $CFG calls, fix attributions, remove some debug

code

htdocs/account/activity/index.json.php

@@ -59,7 +59,7 @@ $limit = param_integer('limit', 10);
 $offset = param_integer('offset', 0);
 
 $userid = $USER->get('id');
-$prefix = get_config('prefix');
+$prefix = get_config('dbprefix');
 
 if ($type == 'all') {
     $count = count_records('notification_internal_activity', 'usr', $userid);

htdocs/account/watchlist/index.php

@@ -159,7 +159,7 @@ function statusChange() {
 
 JAVASCRIPT;
 
-$prefix = get_config('prefix');
+$prefix = get_config('dbprefix');
 $sql = 'SELECT DISTINCT u.* 
         FROM ' . $prefix . 'usr u
         JOIN ' . $prefix . 'view v ON v.owner = u.id 

htdocs/admin/site/networking.php

@@ -18,7 +18,7 @@
  *
  * @package    mahara
  * @subpackage admin
- * @author     Richard Mansfield <richard.mansfield@catalyst.net.nz>
+ * @author     Donal McMullan <richard.mansfield@catalyst.net.nz>
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL
  * @copyright  (C) 2006,2007 Catalyst IT Ltd http://catalyst.net.nz
  *
@@ -30,7 +30,7 @@ define('MENUITEM', 'configsite');
 define('SUBMENUITEM', 'networking');
 
 require(dirname(dirname(dirname(__FILE__))) . '/init.php');
-require($CFG->docroot .'/api/xmlrpc/lib.php');
+require_once(get_config('docroot') . 'api/xmlrpc/lib.php');
 require_once('pieforms/pieform.php');
 require_once('searchlib.php');
 define('TITLE', get_string('networking', 'admin'));

htdocs/admin/users/admins.php

@@ -74,7 +74,7 @@ function adminusers_submit(Pieform $form, $values) {
     execute_sql('UPDATE ' . $table . '
         SET admin = 1
         WHERE id IN (' . join(',', $values['users']) . ')');
-    execute_sql('DELETE FROM ' . get_config('prefix') . 'usr_activity_preference 
+    execute_sql('DELETE FROM ' . get_config('dbprefix') . 'usr_activity_preference 
         WHERE activity IN (SELECT name FROM ' . get_config('dbprefix') . 'activity_type 
             WHERE admin = 1 )
         AND usr NOT IN (' . join(',', $values['users']) . ')');

htdocs/admin/users/uploadcsv.php

@@ -75,14 +75,14 @@ $ALLOWEDKEYS = array(
  * @return array                     Array of auth instance records
  */
 function auth_get_auth_instances() {
-    global $CFG;
     static $cache = array();
 
     if(count($cache) > 0) {
         return $cache;
     }
 
-    // TODO: work out why this won't accept a placeholder - had to use db_quote
+    $dbprefix = get_config('dbprefix');
+
     $sql ='
         SELECT DISTINCT
             i.id,
@@ -90,8 +90,8 @@ function auth_get_auth_instances() {
             institution.displayname,
             i.instancename
         FROM 
-            '.$CFG->dbprefix.'institution,
-            '.$CFG->dbprefix.'auth_instance i
+            '.$dbprefix.'institution,
+            '.$dbprefix.'auth_instance i
         WHERE 
             i.institution = institution.name
         ORDER BY

htdocs/api/xmlrpc/client.php

@@ -25,7 +25,7 @@
  */
 
 defined('INTERNAL') || die();
-require_once($CFG->docroot .'/api/xmlrpc/lib.php');
+require(get_config('docroot') . 'api/xmlrpc/lib.php');
 
 class Client {
 

htdocs/api/xmlrpc/dispatcher.php

@@ -52,7 +52,6 @@ class Dispatcher {
     );
 
     function __construct($payload) {
-        global $CFG;
         $this->payload = $payload;
 
         // xmlrpc_decode_request is defined such that the '$method' string is
@@ -111,8 +110,7 @@ class Dispatcher {
     }
 
     function keyswap($function, $params) {
-        global $CFG;
-        require_once($CFG->docroot .'/include/eLearning/peer.php');
+        require_once(get_config('docroot') . 'include/eLearning/peer.php');
 
         //TODO: Verify params
         (empty($params[0])) ? $wwwroot = null     : $wwwroot     = $params[0];

htdocs/api/xmlrpc/lib.php

@@ -56,7 +56,6 @@ function generate_token() {
 }
 
 function start_jump_session($peer, $instanceid, $wantsurl="") {
-    global $CFG;
     global $USER;
 
     $rpc_negotiation_timeout = 15;
@@ -106,7 +105,7 @@ function start_jump_session($peer, $instanceid, $wantsurl="") {
         }
     }
 
-    $wwwroot = dropslash($CFG->wwwroot);
+    $wwwroot = dropslash(get_config('wwwroot'));
 
     // construct the redirection URL
     $url = "{$peer->wwwroot}{$peer->application->ssolandurl}?token={$sso_session->token}&idp={$wwwroot}&wantsurl={$wantsurl}";
@@ -119,29 +118,26 @@ function api_dummy_method($methodname, $argsarray, $functionname) {
 }
 
 function fetch_user_image($username) {
-    global $REMOTEWWWROOT, $CFG;
+    global $REMOTEWWWROOT;
 
     $institution = get_field('host', 'institution', 'wwwroot', $REMOTEWWWROOT);
 
-    $f = fopen('/tmp/fetchimage.txt','w');
-    fwrite($f, "Starting\n");
-
     if (false == $institution) {
-        fwrite($f, "No ins\n");
         // This should never happen, because if we don't know the host we'll
         // already have exited
         throw new XmlrpcServerException('Unknown error');
     }
 
-    $authinstances       = auth_get_auth_instances_for_institution($institution);
-    $candidates          = array();
+    $dbprefix      = get_config('dbprefix');
+    $authinstances = auth_get_auth_instances_for_institution($institution);
+    $candidates    = array();
 
     $sql = 'SElECT
                 ai.*
             FROM
-                '.$CFG->dbprefix.'auth_instance ai,
-                '.$CFG->dbprefix.'auth_instance ai2,
-                '.$CFG->dbprefix.'auth_instance_config aic
+                '.$dbprefix.'auth_instance ai,
+                '.$dbprefix.'auth_instance ai2,
+                '.$dbprefix.'auth_instance_config aic
             WHERE
                 ai.id = ? AND
                 ai.institution = ? AND
@@ -152,7 +148,6 @@ function fetch_user_image($username) {
                 ai2.authname = \'xmlrpc\'';
 
     foreach ($authinstances as $authinstance) {
-        fwrite($f, "{$authinstance->authname}\n");
         if ($authinstance->authname != 'xmlrpc') {
             $records = get_records_sql_array($sql, array($authinstance->id, $institution));
             if (false == $records) {
@@ -161,7 +156,6 @@ function fetch_user_image($username) {
         }
         try {
             $user = new User;
-            fwrite($f, "{$authinstance->id}, $username\n");
             $user->find_by_instanceid_username($authinstance->id, $username);
             $candidates[$user->id] = $user;
         } catch (Exception $e) {
@@ -171,17 +165,14 @@ function fetch_user_image($username) {
     }
 
     if (count($candidates) != 1) {
-        fwrite($f, "".count($candidates)."\n");
         return false;
     }
 
     $user = array_pop($candidates);
     
-    fwrite($f, "IC: {$user->profileicon}\n");
     $ic = $user->profileicon;
     if (!empty($ic)) {
         $filename = get_config('dataroot') . 'artefact/internal/profileicons/' . ($user->profileicon % 256) . '/'.$user->profileicon;
-        fwrite($f, "FN: $filename\n");
         $return = array();
         try {
             $fi = file_get_contents($filename);
@@ -193,17 +184,16 @@ function fetch_user_image($username) {
 
         require_once('file.php');
         $im = get_dataroot_image_path('artefact/internal/profileicons' , $user->profileicon, '100x100');
-        fwrite($f, "IM: $im\n");
         $fi = file_get_contents($im);
         $return['f2'] = base64_encode($fi);
         return $return;
     } else {
-        fwrite($f, "EMPTY\n");
+        // no icon
     }
 }
 
 function user_authorise($token, $useragent) {
-    global $CFG, $USER;
+    global $USER;
 
     $sso_session = get_record('sso_session', 'token', $token, 'useragent', $useragent);
     if (empty($sso_session)) {
@@ -226,8 +216,8 @@ function user_authorise($token, $useragent) {
         throw new Exception('Unable to get information for the specified user');
     }
 
-    require_once($CFG->docroot .'/artefact/lib.php');
-    require_once($CFG->docroot .'/artefact/internal/lib.php');
+    require(get_config('docroot') . 'artefact/lib.php');
+    require(get_config('docroot') . 'artefact/internal/lib.php');
 
     $element_list = call_static_method('ArtefactTypeProfile', 'get_all_fields');
     $element_required = call_static_method('ArtefactTypeProfile', 'get_mandatory_fields');
@@ -264,7 +254,7 @@ function user_authorise($token, $useragent) {
 
     // Todo: push application name to list of hosts... update Moodle block to display more info, maybe in 'Other' list
     $userdata['myhosts'] = array();
-    $userdata['myhosts'][] = array('name'=> $SITE->shortname, 'url' => $CFG->wwwroot, 'count' => 0);
+    $userdata['myhosts'][] = array('name'=> $SITE->shortname, 'url' => get_config('wwwroot'), 'count' => 0);
 
     return $userdata;
 }
@@ -274,7 +264,6 @@ function user_authorise($token, $useragent) {
  * instances of its canonical auth instance
  */
 function get_service_providers($instance) {
-    global $CFG;
     static $cache = array();
 
     if (defined('INSTALLER')) {
@@ -285,6 +274,8 @@ function get_service_providers($instance) {
         return $cache[$instance];
     }
 
+    $dbprefix = get_config('dbprefix');
+
     $query = '
         SELECT
             h.name,
@@ -292,11 +283,11 @@ function get_service_providers($instance) {
             h.wwwroot,
             aic.instance
         FROM
-            '.$CFG->prefix.'auth_instance_config aic,
-            '.$CFG->prefix.'auth_instance_config aic2,
-            '.$CFG->prefix.'auth_instance_config aic3,
-            '.$CFG->prefix.'host h,
-            '.$CFG->prefix.'application a
+            '.$dbprefix.'auth_instance_config aic,
+            '.$dbprefix.'auth_instance_config aic2,
+            '.$dbprefix.'auth_instance_config aic3,
+            '.$dbprefix.'host h,
+            '.$dbprefix.'application a
         WHERE
             aic.value = ?  AND
             aic.field = \'parent\' AND
@@ -330,7 +321,6 @@ function get_service_providers($instance) {
 }
 
 function get_public_key($uri, $application=null) {
-    global $CFG;
 
     static $keyarray = array();
     if (isset($keyarray[$uri])) {
@@ -347,7 +337,7 @@ function get_public_key($uri, $application=null) {
     if (empty($xmlrpcserverurl)) {
         throw new XmlrpcClientException('Unknown application');
     } 
-    $wwwroot = dropslash($CFG->wwwroot);
+    $wwwroot = dropslash(get_config('wwwroot'));
 
     $rq = xmlrpc_encode_request('system/keyswap', array($wwwroot, $openssl->certificate), array("encoding" => "utf-8"));
     $ch = curl_init($uri . $xmlrpcserverurl);
@@ -446,13 +436,12 @@ function parse_payload($payload) {
 }
 
 function get_peer($wwwroot) {
-    global $CFG;
 
     $wwwroot = (string)$wwwroot;
     static $peers = array();
     if(isset($peers[$wwwroot])) return $peers[$wwwroot];
 
-    require_once($CFG->docroot .'/include/eLearning/peer.php');
+    require_once(get_config('docroot') . 'include/eLearning/peer.php');
     $peer = new Peer();
 
     if(!$peer->findByWwwroot($wwwroot)) {
@@ -464,7 +453,6 @@ function get_peer($wwwroot) {
 }
 
 function xmldsig_envelope_strip(&$xml) {
-    global $CFG;
 
     $signature      = base64_decode($xml->Signature->SignatureValue);
     $payload        = base64_decode($xml->object);
@@ -517,7 +505,6 @@ function xmldsig_envelope_strip(&$xml) {
  * @return string                         An XML-ENC document
  */
 function xmlenc_envelope($message, $remote_certificate) {
-    global $CFG;
 
     // Generate a key resource from the remote_certificate text string
     $publickey = openssl_get_publickey($remote_certificate);
@@ -528,7 +515,7 @@ function xmlenc_envelope($message, $remote_certificate) {
     }
 
     // Initialize vars
-    $wwwroot = dropslash($CFG->wwwroot);
+    $wwwroot = dropslash(get_config('wwwroot'));
     $encryptedstring = '';
     $symmetric_keys = array();
 
@@ -595,9 +582,9 @@ EOF;
  * @return string                         An XML-DSig document
  */
 function xmldsig_envelope($message) {
-    global $CFG;
+
     $openssl = OpenSslRepo::singleton();
-    $wwwroot = dropslash($CFG->wwwroot);
+    $wwwroot = dropslash(get_config('wwwroot'));
     $digest = sha1($message);
 
     $sig = base64_encode($openssl->sign_message($message));
@@ -844,8 +831,7 @@ class OpenSslRepo {
      * @return  string      The signature over that text
      */
     private function generate_keypair() {
-        global $CFG;
-        $host = get_hostname_from_uri($CFG->wwwroot);
+        $host = get_hostname_from_uri(get_config('wwwroot'));
 
         $organization = get_config('sitename');
         $email        = get_config('noreplyaddress');

htdocs/api/xmlrpc/server.php

@@ -46,7 +46,7 @@ require(dirname(__FILE__).'/lib.php');
 // Catch anything that goes wrong in init.php
 ob_start();
     require(dirname(dirname(dirname(__FILE__))).'/init.php');
-    require_once($CFG->docroot .'/api/xmlrpc/dispatcher.php');
+    require_once(get_config('docroot') . 'api/xmlrpc/dispatcher.php');
     $errors = trim(ob_get_contents());
 ob_end_clean();
 

htdocs/auth/imap/lib.php

@@ -25,8 +25,7 @@
  */
 
 defined('INTERNAL') || die();
-global $CFG;
-require_once($CFG->docroot .'/auth/lib.php');
+require_once(get_config('docroot') . 'auth/lib.php');
 
 /**
  * The internal authentication method, which authenticates users against the
@@ -75,7 +74,6 @@ class AuthImap extends Auth {
      */
     public function authenticate_user_account($user, $password) {
         $this->must_be_ready();
-        global $CFG;
 
         if (! function_exists('imap_open')) {
             throw new ConfigException('IMAP is not available in your PHP environment. Check that it is properly installed');

htdocs/auth/internal/lib.php

@@ -25,8 +25,7 @@
  */
 
 defined('INTERNAL') || die();
-global $CFG;
-require_once($CFG->docroot .'/auth/lib.php');
+require_once(get_config('docroot') . 'auth/lib.php');
 
 /**
  * The internal authentication method, which authenticates users against the

htdocs/auth/lib.php

@@ -388,13 +388,14 @@ function auth_setup () {
  * @return array                     Array of auth instance records
  */
 function auth_get_auth_instances_for_institution($institution=null) {
-    global $CFG;
     static $cache = array();
 
     if(null == $institution) {
         return array();
     }
 
+    $dbprefix = get_config('dbprefix');
+
     if (!isset($cache[$institution])) {
         // Get auth instances in order of priority
         // DO NOT CHANGE THE SORT ORDER OF THIS RESULT SET
@@ -410,8 +411,8 @@ function auth_get_auth_instances_for_institution($institution=null) {
                 a.requires_config,
                 a.requires_parent
             FROM 
-                '.$CFG->dbprefix.'auth_instance i,
-                '.$CFG->dbprefix.'auth_installed a
+                '.$dbprefix.'auth_instance i,
+                '.$dbprefix.'auth_installed a
             WHERE 
                 a.name = i.authname AND
                 i.institution = '. db_quote($institution).'
@@ -429,16 +430,26 @@ function auth_get_auth_instances_for_institution($institution=null) {
     return $cache[$institution];
 }
 
+/**
+ * Given a wwwroot, find any auth instances that can come from that host
+ * 
+ * @param   string  wwwroot of the host that is connecting to us
+ * @return  array   array of record objects
+ */
 function auth_get_auth_instances_for_wwwroot($wwwroot) {
-    global $CFG;
+
+    $dbprefix = get_config('dbprefix');
+
+    // TODO: we just need ai.id and ai.authname... rewrite query, or
+    // just drop this function
     $query = "  SELECT
                     ai.*,
                     aic.*,
                     i.*
                 FROM
-                    {$CFG->dbprefix}auth_instance ai, 
-                    {$CFG->dbprefix}auth_instance_config aic,
-                    {$CFG->dbprefix}institution i
+                    {$dbprefix}auth_instance ai, 
+                    {$dbprefix}auth_instance_config aic,
+                    {$dbprefix}institution i
                 WHERE
                     aic.field = 'wwwroot' AND
                     aic.value = ? AND
@@ -456,7 +467,6 @@ function auth_get_auth_instances_for_wwwroot($wwwroot) {
  * @return array                     Array of auth instance records
  */
 function auth_get_auth_instances_for_username($institution, $username) {
-    global $CFG;
     static $cache = array();
 
     if (!isset($cache[$institution][$username])) {
@@ -464,6 +474,8 @@ function auth_get_auth_instances_for_username($institution, $username) {
         // DO NOT CHANGE THE SORT ORDER OF THIS RESULT SET
         // YEAH EINSTEIN - THAT MEANS YOU!!!
 
+        $dbprefix = get_config('dbprefix');
+
         // TODO: work out why this won't accept a placeholder - had to use db_quote
         $sql ='
             SELECT DISTINCT
@@ -474,9 +486,9 @@ function auth_get_auth_instances_for_username($institution, $username) {
                 a.requires_config,
                 a.requires_parent
             FROM 
-                '.$CFG->dbprefix.'auth_instance i,
-                '.$CFG->dbprefix.'auth_installed a,
-                '.$CFG->dbprefix.'usr u
+                '.$dbprefix.'auth_instance i,
+                '.$dbprefix.'auth_installed a,
+                '.$dbprefix.'usr u
             WHERE 
                 a.name = i.authname AND
                 i.institution = ? AND
@@ -504,20 +516,22 @@ function auth_get_auth_instances_for_username($institution, $username) {
  * @return array                     Array of auth instance records
  */
 function auth_get_available_auth_types($institution=null) {
-    global $CFG;
+
     if (!is_null($institution) && (!is_string($institution) || strlen($institution) > 255)) {
         return array();
     }
 
+    $dbprefix = get_config('dbprefix');
+
     // TODO: work out why this won't accept a placeholder - had to use db_quote
     $sql ='
         SELECT DISTINCT
             a.name,
             a.requires_config
         FROM 
-            '.$CFG->dbprefix.'auth_installed a
+            '.$dbprefix.'auth_installed a
         LEFT JOIN 
-            '.$CFG->dbprefix.'auth_instance i
+            '.$dbprefix.'auth_instance i
         ON 
             a.name = i.authname AND
             i.institution = '. db_quote($institution).'

htdocs/auth/user.php

@@ -94,19 +94,20 @@ class User {
      * 
      */
     public function find_by_id($id) {
-        global $CFG;
 
         if (!is_numeric($id) || $id < 0) {
             throw new InvalidArgumentException('parameter must be a positive integer to create a User object');
         }
 
+        $dbprefix = get_config('dbprefix');
+
         $sql = 'SELECT
                     *, 
                     ' . db_format_tsfield('expiry') . ', 
                     ' . db_format_tsfield('lastlogin') . ', 
                     ' . db_format_tsfield('suspendedctime') . '
                 FROM
-                    '.$CFG->dbprefix.'usr
+                    '.$dbprefix.'usr
                 WHERE
                     id = ?';
 
@@ -124,7 +125,6 @@ class User {
      * 
      */
     public function find_by_instanceid_username($instanceid, $username) {
-        global $CFG;
 
         if (!is_numeric($instanceid) || $instanceid < 0) {
             throw new InvalidArgumentException('parameter must be a positive integer to create a User object');
@@ -134,13 +134,15 @@ class User {
             $instanceid = $parentid;
         }
 
+        $dbprefix = get_config('dbprefix');
+
         $sql = 'SELECT
                     *, 
                     ' . db_format_tsfield('expiry') . ', 
                     ' . db_format_tsfield('lastlogin') . ', 
                     ' . db_format_tsfield('suspendedctime') . '
                 FROM
-                    '.$CFG->dbprefix.'usr
+                    '.$dbprefix.'usr
                 WHERE
                     LOWER(username) = ? AND
                     authinstance = ?';

htdocs/auth/xmlrpc/jump.php

@@ -14,9 +14,9 @@
 define('INTERNAL', 1);
 
 require(dirname(dirname(dirname(__FILE__))).'/init.php');
-require_once($CFG->docroot .'/api/xmlrpc/client.php');
-require_once($CFG->docroot .'/auth/xmlrpc/lib.php');
-require_once($CFG->docroot .'/include/eLearning/institution.php');
+require_once(get_config('docroot') .'api/xmlrpc/client.php');
+require_once(get_config('docroot') .'auth/xmlrpc/lib.php');
+require_once(get_config('docroot') .'include/eLearning/institution.php');
 
 $remotewwwroot = param_variable('wr');
 $instanceid    = param_variable('ins');

htdocs/auth/xmlrpc/land.php

@@ -19,9 +19,9 @@ define('XMLRPC', 1);
 
 
 require(dirname(dirname(dirname(__FILE__))).'/init.php');
-require_once($CFG->docroot .'/api/xmlrpc/client.php');
-require_once($CFG->docroot .'/auth/xmlrpc/lib.php');
-require_once($CFG->docroot .'/include/eLearning/institution.php');
+require_once(get_config('docroot') .'api/xmlrpc/client.php');
+require_once(get_config('docroot') .'auth/xmlrpc/lib.php');
+require_once(get_config('docroot') .'include/eLearning/institution.php');
 
 $token         = param_variable('token');
 $remotewwwroot = param_variable('idp');
@@ -48,6 +48,6 @@ foreach($instances as $instance) {
 }
 // confirm the MNET session
 // redirect
-redirect($CFG->wwwroot . $wantsurl);
+redirect(get_config('wwwroot') . $wantsurl);
 
 ?>

htdocs/auth/xmlrpc/lib.php

@@ -25,11 +25,10 @@
  */
 
 defined('INTERNAL') || die();
-global $CFG;
-require_once($CFG->docroot .'/auth/lib.php');
-require_once($CFG->docroot .'/include/eLearning/peer.php');
-require_once($CFG->docroot .'/include/eLearning/applicationset.php');
-require_once($CFG->docroot .'/api/xmlrpc/lib.php');
+require_once(get_config('docroot') . 'auth/lib.php');
+require_once(get_config('docroot') . 'include/eLearning/peer.php');
+require_once(get_config('docroot') . 'include/eLearning/applicationset.php');
+require_once(get_config('docroot') . 'api/xmlrpc/lib.php');
 
 /**
  * The XMLRPC authentication method, which authenticates users against the
@@ -100,7 +99,7 @@ class AuthXmlrpc extends Auth {
      * Grab a delegate object for auth stuff
      */
     public function request_user_authorise($token, $remotewwwroot) {
-        global $CFG, $USER;
+        global $USER;
         $this->must_be_ready();
         $peer = get_peer($remotewwwroot);
 
@@ -258,8 +257,8 @@ class AuthXmlrpc extends Auth {
                         $error =  get_string('profileiconuploadexceedsquota', 'artefact.internal', get_config('wwwroot'));
                     }
 
-                    require_once($CFG->docroot .'/artefact/lib.php');
-                    require_once($CFG->docroot .'/artefact/internal/lib.php');
+                    require_once(get_config('docroot') .'/artefact/lib.php');
+                    require_once(get_config('docroot') .'/artefact/internal/lib.php');
 
                     // Entry in artefact table
                     $artefact = new ArtefactTypeProfileIcon();

htdocs/contacts/communities/view.json.php

@@ -48,7 +48,7 @@ if (!$membership = user_can_access_community($id)) {
 }
 $community = get_record('community', 'id', $id);
 
-$prefix = get_config('prefix');
+$prefix = get_config('dbprefix');
 $dbnow  = db_format_timestamp(time());
 
 switch ($type) {

htdocs/include/eLearning/applicationset.php

@@ -25,8 +25,7 @@
  */
 
 defined('INTERNAL') || die();
-global $CFG;
-require_once($CFG->docroot .'/include/eLearning/application.php');
+require_once(get_config('docroot') . 'include/eLearning/application.php');
 
 class ApplicationSet implements Iterator {
 

htdocs/include/eLearning/hostset.php

@@ -27,8 +27,7 @@
 // TODO : lib
 
 defined('INTERNAL') || die();
-global $CFG;
-require_once($CFG->docroot .'/include/eLearning/peer.php');
+require_once(get_config('docroot') .'include/eLearning/peer.php');
 
 class HostSet implements Iterator {
 
@@ -44,12 +43,13 @@ class HostSet implements Iterator {
     }
 
     function findByInstitution($institution) {
-        global $CFG;
+
+        $dbprefix = get_config('dbprefix');
 
         $sql = 'SELECT