mirror of
https://github.com/moodle/moodle.git
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7104d80dbc
DB to detect such value dinamically. Useful for installations not using the standard installer but manually edited config.php files. Little TODO: modify a bit the initial config tables insets to insert this value, avoiding to call it for each request. Coming soon (although not mandatory for 1.6beta). Tested against both MySQL and PostgreSQL with unicode and non-unicode DBs.
570 lines
20 KiB
PHP
570 lines
20 KiB
PHP
<?php
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/**
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* setup.php - Sets up sessions, connects to databases and so on
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*
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* Normally this is only called by the main config.php file
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* Normally this file does not need to be edited.
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* @author Martin Dougiamas
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* @version $Id$
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* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
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* @package moodlecore
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*/
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////// DOCUMENTATION IN PHPDOC FORMAT FOR MOODLE GLOBALS AND COMMON OBJECT TYPES /////////////
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/**
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* $USER is a global instance of a typical $user record.
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*
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* Items found in the user record:
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* - $USER->emailstop - Does the user want email sent to them?
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* - $USER->email - The user's email address.
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* - $USER->id - The unique integer identified of this user in the 'user' table.
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* - $USER->email - The user's email address.
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* - $USER->firstname - The user's first name.
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* - $USER->lastname - The user's last name.
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* - $USER->username - The user's login username.
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* - $USER->secret - The user's ?.
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* - $USER->lang - The user's language choice.
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*
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* @global object(user) $USER
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*/
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global $USER;
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/**
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* This global variable is read in from the 'config' table.
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*
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* Some typical settings in the $CFG global:
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* - $CFG->wwwroot - Path to moodle index directory in url format.
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* - $CFG->dataroot - Path to moodle index directory on server's filesystem.
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* - $CFG->libroot - Path to moodle's library folder on server's filesystem.
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*
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* @global object(cfg) $CFG
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*/
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global $CFG;
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/**
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* Definition of session type
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* @global object(session) $SESSION
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*/
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global $SESSION;
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/**
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* Definition of course type
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* @global object(course) $COURSE
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*/
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global $COURSE;
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/**
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* Definition of db type
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* @global object(db) $db
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*/
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global $db;
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/**
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* $THEME is a global that defines the site theme.
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*
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* Items found in the theme record:
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* - $THEME->cellheading - Cell colors.
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* - $THEME->cellheading2 - Alternate cell colors.
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*
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* @global object(theme) $THEME
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*/
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global $THEME;
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/**
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* HTTPSPAGEREQUIRED is a global to define if the page being displayed must run under HTTPS.
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*
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* It's primary goal is to allow 100% HTTPS pages when $CFG->loginhttps is enabled. Default to false.
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* It's enabled only by the httpsrequired() function and used in some pages to update some URLs
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*/
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global $HTTPSPAGEREQUIRED;
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/// First try to detect some attacks on older buggy PHP versions
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if (isset($_REQUEST['GLOBALS']) || isset($_COOKIE['GLOBALS']) || isset($_FILES['GLOBALS'])) {
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die('Fatal: Illegal GLOBALS overwrite attempt detected!');
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}
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if (!isset($CFG->wwwroot)) {
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trigger_error('Fatal: $CFG->wwwroot is not configured! Exiting.');
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die;
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}
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/// Set httpswwwroot default value (this variable will replace $CFG->wwwroot
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/// inside some URLs used in HTTPSPAGEREQUIRED pages.
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$CFG->httpswwwroot = $CFG->wwwroot;
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$CFG->libdir = $CFG->dirroot .'/lib';
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require_once($CFG->libdir .'/setuplib.php'); // Functions that MUST be loaded first
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/// Time to start counting
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init_performance_info();
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/// If there are any errors in the standard libraries we want to know!
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error_reporting(E_ALL);
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/// Just say no to link prefetching (Moz prefetching, Google Web Accelerator, others)
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/// http://www.google.com/webmasters/faq.html#prefetchblock
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if (!empty($_SERVER['HTTP_X_moz']) && $_SERVER['HTTP_X_moz'] === 'prefetch'){
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header($_SERVER['SERVER_PROTOCOL'] . ' 404 Prefetch Forbidden');
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trigger_error('Prefetch request forbidden.');
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exit;
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}
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/// Connect to the database using adodb
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require_once($CFG->libdir .'/adodb/adodb.inc.php'); // Database access functions
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$db = &ADONewConnection($CFG->dbtype);
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error_reporting(0); // Hide errors
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if (!isset($CFG->dbpersist) or !empty($CFG->dbpersist)) { // Use persistent connection (default)
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$dbconnected = $db->PConnect($CFG->dbhost,$CFG->dbuser,$CFG->dbpass,$CFG->dbname);
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} else { // Use single connection
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$dbconnected = $db->Connect($CFG->dbhost,$CFG->dbuser,$CFG->dbpass,$CFG->dbname);
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}
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if (! $dbconnected) {
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// In the name of protocol correctness, monitoring and performance
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// profiling, set the appropriate error headers for machine comsumption
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if (isset($_SERVER['SERVER_PROTOCOL'])) {
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// Avoid it with cron.php. Note that we assume it's HTTP/1.x
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header($_SERVER['SERVER_PROTOCOL'] . ' 503 Service Unavailable');
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}
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// and then for human consumption...
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echo '<html><body>';
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echo '<table align="center"><tr>';
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echo '<td style="color:#990000; text-align:center; font-size:large; border-width:1px; '.
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' border-color:#000000; border-style:solid; border-radius: 20px; border-collapse: collapse; '.
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' -moz-border-radius: 20px; padding: 15px">';
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echo '<p>Error: Database connection failed.</p>';
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echo '<p>It is possible that the database is overloaded or otherwise not running properly.</p>';
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echo '<p>The site administrator should also check that the database details have been correctly specified in config.php</p>';
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echo '</td></tr></table>';
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echo '</body></html>';
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if (!empty($CFG->emailconnectionerrorsto)) {
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mail($CFG->emailconnectionerrorsto,
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'WARNING: Database connection error: '.$CFG->wwwroot,
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'Connection error: '.$CFG->wwwroot);
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}
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die;
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}
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/// Starting here we have a correct DB conection but me must avoid
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/// to execute any DB transaction until "set names" has been executed
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/// some lines below!
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error_reporting(E_ALL); // Show errors from now on.
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if (!isset($CFG->prefix)) { // Just in case it isn't defined in config.php
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$CFG->prefix = '';
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}
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/// Define admin directory
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if (!isset($CFG->admin)) { // Just in case it isn't defined in config.php
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$CFG->admin = 'admin'; // This is relative to the wwwroot and dirroot
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}
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/// Load up standard libraries
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require_once($CFG->libdir .'/textlib.class.php'); // Functions to handle multibyte strings
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require_once($CFG->libdir .'/weblib.php'); // Functions for producing HTML
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require_once($CFG->libdir .'/datalib.php'); // Functions for accessing databases
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require_once($CFG->libdir .'/moodlelib.php'); // Other general-purpose functions
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/// Increase memory limits if possible
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raise_memory_limit('64M'); // We should never NEED this much but just in case...
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/// Load up any configuration from the config table
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$CFG = get_config();
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/// Turn on SQL logging if required
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if (!empty($CFG->logsql)) {
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$db->LogSQL();
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}
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/// Set error reporting back to normal
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if (empty($CFG->debug)) {
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$CFG->debug = 7;
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}
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error_reporting($CFG->debug);
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/// If $CFG->unicodedb is not set, calculate it because we need
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/// "set names" (below) properly executed *before* performing any
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/// DB transaction
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if ($dbconnected && !isset($CFG->unicodedb)) {
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$CFG->unicodedb = setup_is_unicodedb();
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}
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/// Set the client/server and connection to utf8 if necessary
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if ($dbconnected && $CFG->unicodedb) {
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if ($db->databaseType == 'mysql') {
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$db->Execute("SET NAMES 'utf8'");
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} else if ($db->databaseType == 'postgres7') {
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$db->Execute("SET NAMES 'utf8'");
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}
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}
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/// Now that "set names" has been executed it is safe to
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/// work with the DB, but never before this!
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/// Set a default enrolment configuration (see bug 1598)
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if (!isset($CFG->enrol)) {
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$CFG->enrol = 'manual';
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}
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/// Set default enabled enrolment plugins
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if (!isset($CFG->enrol_plugins_enabled)) {
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$CFG->enrol_plugins_enabled = 'manual';
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}
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/// File permissions on created directories in the $CFG->dataroot
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if (empty($CFG->directorypermissions)) {
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$CFG->directorypermissions = 0777; // Must be octal (that's why it's here)
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}
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/// Setup cache dir for Smarty and others
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if (!file_exists($CFG->dataroot .'/cache')) {
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make_upload_directory('cache');
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}
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/// Set up smarty template system
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//require_once($CFG->libdir .'/smarty/Smarty.class.php');
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//$smarty = new Smarty;
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//$smarty->template_dir = $CFG->dirroot .'/templates/'. $CFG->template;
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//if (!file_exists($CFG->dataroot .'/cache/smarty')) {
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// make_upload_directory('cache/smarty');
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//}
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//$smarty->compile_dir = $CFG->dataroot .'/cache/smarty';
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/// Set up session handling
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if(empty($CFG->respectsessionsettings)) {
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if (empty($CFG->dbsessions)) { /// File-based sessions
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// Some distros disable GC by setting probability to 0
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// overriding the PHP default of 1
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// (gc_probability is divided by gc_divisor, which defaults to 1000)
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if (ini_get('session.gc_probability') == 0) {
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ini_set('session.gc_probability', 1);
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}
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if (!empty($CFG->sessiontimeout)) {
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ini_set('session.gc_maxlifetime', $CFG->sessiontimeout);
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}
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if (!file_exists($CFG->dataroot .'/sessions')) {
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make_upload_directory('sessions');
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}
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ini_set('session.save_path', $CFG->dataroot .'/sessions');
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} else { /// Database sessions
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ini_set('session.save_handler', 'user');
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$ADODB_SESSION_DRIVER = $CFG->dbtype;
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$ADODB_SESSION_CONNECT = $CFG->dbhost;
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$ADODB_SESSION_USER = $CFG->dbuser;
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$ADODB_SESSION_PWD = $CFG->dbpass;
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$ADODB_SESSION_DB = $CFG->dbname;
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$ADODB_SESSION_TBL = $CFG->prefix.'sessions';
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require_once($CFG->libdir. '/adodb/session/adodb-session.php');
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}
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}
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/// Set sessioncookie variable if it isn't already
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if (!isset($CFG->sessioncookie)) {
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$CFG->sessioncookie = '';
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}
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/// Configure ampersands in URLs
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@ini_set('arg_separator.output', '&');
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/// Location of standard files
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$CFG->wordlist = $CFG->libdir .'/wordlist.txt';
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$CFG->javascript = $CFG->libdir .'/javascript.php';
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$CFG->moddata = 'moddata';
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/// A hack to get around magic_quotes_gpc being turned off
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/// It is strongly recommended to enable "magic_quotes_gpc"!
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if (!ini_get_bool('magic_quotes_gpc') ) {
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function addslashes_deep($value) {
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$value = is_array($value) ?
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array_map('addslashes_deep', $value) :
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addslashes($value);
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return $value;
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}
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$_POST = array_map('addslashes_deep', $_POST);
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$_GET = array_map('addslashes_deep', $_GET);
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$_COOKIE = array_map('addslashes_deep', $_COOKIE);
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$_REQUEST = array_map('addslashes_deep', $_REQUEST);
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if (!empty($_SERVER['REQUEST_URI'])) {
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$_SERVER['REQUEST_URI'] = addslashes($_SERVER['REQUEST_URI']);
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}
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if (!empty($_SERVER['QUERY_STRING'])) {
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$_SERVER['QUERY_STRING'] = addslashes($_SERVER['QUERY_STRING']);
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}
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if (!empty($_SERVER['HTTP_REFERER'])) {
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$_SERVER['HTTP_REFERER'] = addslashes($_SERVER['HTTP_REFERER']);
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}
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if (!empty($_SERVER['PATH_INFO'])) {
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$_SERVER['PATH_INFO'] = addslashes($_SERVER['PATH_INFO']);
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}
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if (!empty($_SERVER['PHP_SELF'])) {
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$_SERVER['PHP_SELF'] = addslashes($_SERVER['PHP_SELF']);
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}
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if (!empty($_SERVER['PATH_TRANSLATED'])) {
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$_SERVER['PATH_TRANSLATED'] = addslashes($_SERVER['PATH_TRANSLATED']);
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}
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}
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/// The following is a hack to get around the problem of PHP installations
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/// that have "register_globals" turned off (default since PHP 4.1.0).
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/// This hack will be removed in 1.6.
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/// It is strongly recommended to disable "register_globals"!
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/// $CFG->disableglobalshack=true in config.php will override this (for dev testing)
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if (empty($CFG->disableglobalshack)) {
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if (!empty($CFG->detect_unchecked_vars)) {
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global $UNCHECKED_VARS;
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$UNCHECKED_VARS->url = $_SERVER['PHP_SELF'];
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$UNCHECKED_VARS->vars = array();
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}
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if (isset($_GET)) {
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extract($_GET, EXTR_SKIP); // Skip existing variables, ie CFG
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if (!empty($CFG->detect_unchecked_vars)) {
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foreach ($_GET as $key => $val) {
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$UNCHECKED_VARS->vars[$key]=$val;
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}
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}
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}
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if (isset($_POST)) {
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extract($_POST, EXTR_SKIP); // Skip existing variables, ie CFG
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if (!empty($CFG->detect_unchecked_vars)) {
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foreach ($_POST as $key => $val) {
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$UNCHECKED_VARS->vars[$key]=$val;
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}
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}
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}
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if (isset($_SERVER)) {
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extract($_SERVER);
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}
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}
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/// Load up global environment variables
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class object {};
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//discard session ID from POST, GET and globals to tighten security,
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//this session fixation prevention can not be used in cookieless mode
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if (empty($CFG->usesid)) {
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unset(${'MoodleSession'.$CFG->sessioncookie});
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unset($_GET['MoodleSession'.$CFG->sessioncookie]);
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unset($_POST['MoodleSession'.$CFG->sessioncookie]);
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}
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//compatibility hack for Moodle Cron, cookies not deleted, but set to "deleted"
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if (!empty($_COOKIE['MoodleSession'.$CFG->sessioncookie]) && $_COOKIE['MoodleSession'.$CFG->sessioncookie] == "deleted") {
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unset($_COOKIE['MoodleSession'.$CFG->sessioncookie]);
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}
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if (!empty($_COOKIE['MoodleSessionTest'.$CFG->sessioncookie]) && $_COOKIE['MoodleSessionTest'.$CFG->sessioncookie] == "deleted") {
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unset($_COOKIE['MoodleSessionTest'.$CFG->sessioncookie]);
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}
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if (!empty($CFG->usesid) && empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) {
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require_once("$CFG->dirroot/lib/cookieless.php");
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sid_start_ob();
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}
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if (!isset($nomoodlecookie)) {
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session_name('MoodleSession'.$CFG->sessioncookie);
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@session_start();
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if (! isset($_SESSION['SESSION'])) {
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$_SESSION['SESSION'] = new object;
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$_SESSION['SESSION']->session_test = random_string(10);
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if (!empty($_COOKIE['MoodleSessionTest'.$CFG->sessioncookie])) {
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$_SESSION['SESSION']->has_timed_out = true;
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}
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setcookie('MoodleSessionTest'.$CFG->sessioncookie, $_SESSION['SESSION']->session_test, 0, '/');
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$_COOKIE['MoodleSessionTest'.$CFG->sessioncookie] = $_SESSION['SESSION']->session_test;
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}
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if (! isset($_SESSION['USER'])) {
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$_SESSION['USER'] = new object;
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}
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$SESSION = &$_SESSION['SESSION']; // Makes them easier to reference
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$USER = &$_SESSION['USER'];
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}
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else {
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$SESSION = NULL;
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$USER = NULL;
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}
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if (defined('FULLME')) { // Usually in command-line scripts like admin/cron.php
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$FULLME = FULLME;
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$ME = FULLME;
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} else {
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$FULLME = qualified_me();
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$ME = strip_querystring($FULLME);
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}
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/// In VERY rare cases old PHP server bugs (it has been found on PHP 4.1.2 running
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/// as a CGI under IIS on Windows) may require that you uncomment the following:
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// session_register("USER");
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// session_register("SESSION");
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/// Load up theme variables (colours etc)
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if (!isset($CFG->themedir)) {
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$CFG->themedir = $CFG->dirroot.'/theme/';
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$CFG->themewww = $CFG->wwwroot.'/theme/';
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}
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if (isset($_GET['theme'])) {
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if ($CFG->allowthemechangeonurl || confirm_sesskey()) {
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if (!detect_munged_arguments($_GET['theme'], 0) and file_exists($CFG->themedir. $_GET['theme'])) {
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$SESSION->theme = $_GET['theme'];
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}
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}
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}
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if (!isset($CFG->theme)) {
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$CFG->theme = 'standardwhite';
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}
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theme_setup(); // Sets up theme global variables
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/// now do a session test to prevent random user switching - observed on some PHP/Apache combinations,
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/// disable checks when working in cookieless mode
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if (empty($CFG->usesid) || !empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) {
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if ($SESSION != NULL) {
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if (empty($_COOKIE['MoodleSessionTest'.$CFG->sessioncookie])) {
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report_session_error();
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} else if (isset($SESSION->session_test) && $_COOKIE['MoodleSessionTest'.$CFG->sessioncookie] != $SESSION->session_test) {
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report_session_error();
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}
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}
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}
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/// Calculate and set $CFG->ostype to be used everywhere. Possible values are:
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/// - WINDOWS: for any Windows flavour.
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/// - UNIX: for the rest
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/// Also, $CFG->os can continue being used if more specialization is required
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if (stristr(PHP_OS, 'win') && !stristr(PHP_OS, 'darwin')) {
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$CFG->ostype = 'WINDOWS';
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} else {
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$CFG->ostype = 'UNIX';
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}
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$CFG->os = PHP_OS;
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/// Set language/locale of printed times. If user has chosen a language that
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/// that is different from the site language, then use the locale specified
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/// in the language file. Otherwise, if the admin hasn't specified a locale
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/// then use the one from the default language. Otherwise (and this is the
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/// majority of cases), use the stored locale specified by admin.
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if (isset($_GET['lang'])) {
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if (!detect_munged_arguments($lang, 0) and (file_exists($CFG->dataroot .'/lang/'. $lang) or
|
|
file_exists($CFG->dirroot .'/lang/'. $lang))) {
|
|
$SESSION->lang = $lang;
|
|
}
|
|
}
|
|
if (empty($CFG->lang)) {
|
|
$CFG->lang = !empty($CFG->unicodedb) ? 'en_utf8' : 'en';
|
|
}
|
|
|
|
moodle_setlocale();
|
|
|
|
if (!empty($CFG->opentogoogle)) {
|
|
if (empty($_SESSION['USER'])) { // Ignore anyone logged in
|
|
if (!empty($_SERVER['HTTP_USER_AGENT'])) {
|
|
if (strpos($_SERVER['HTTP_USER_AGENT'], 'Googlebot') !== false ) {
|
|
$USER = guest_user();
|
|
} else if (strpos($_SERVER['HTTP_USER_AGENT'], 'google.com') !== false ) {
|
|
$USER = guest_user();
|
|
} else if (strpos($_SERVER['HTTP_USER_AGENT'], 'Yahoo! Slurp') !== false ) {
|
|
$USER = guest_user();
|
|
} else if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSNBOT') !== false ) {
|
|
$USER = guest_user();
|
|
}
|
|
}
|
|
if (empty($USER) && !empty($_SERVER['HTTP_REFERER'])) {
|
|
if (strpos($_SERVER['HTTP_REFERER'], 'google') !== false ) {
|
|
$USER = guest_user();
|
|
} else if (strpos($_SERVER['HTTP_REFERER'], 'altavista') !== false ) {
|
|
$USER = guest_user();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($CFG->theme == 'standard' or $CFG->theme == 'standardwhite') { // Temporary measure to help with XHTML validation
|
|
if (empty($_SESSION['USER']->id)) { // Allow W3CValidator in as user called w3cvalidator (or guest)
|
|
if ((strpos($_SERVER['HTTP_USER_AGENT'], 'W3C_Validator') !== false) or
|
|
(strpos($_SERVER['HTTP_USER_AGENT'], 'Cynthia') !== false )) {
|
|
if ($USER = get_complete_user_data("username", "w3cvalidator")) {
|
|
$USER->ignoresesskey = true;
|
|
} else {
|
|
$USER = guest_user();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Apache log intergration. In apache conf file one can use ${MOODULEUSER}n in
|
|
/// LogFormat to get the current logged in username in moodle.
|
|
if ($USER && function_exists('apache_note') && !empty($CFG->apacheloguser)) {
|
|
$apachelog_username = clean_filename($USER->username);
|
|
$apachelog_name = clean_filename($USER->firstname. " ".$USER->lastname);
|
|
$apachelog_userid = $USER->id;
|
|
if (isset($USER->realuser)) {
|
|
if ($realuser = get_record('user', 'id', $USER->realuser)) {
|
|
$apachelog_username = clean_filename($realuser->username." as ".$apachelog_username);
|
|
$apachelog_name = clean_filename($realuser->firstname." ".$realuser->lastname ." as ".$apachelog_name);
|
|
$apachelog_userid = clean_filename($realuser->id." as ".$apachelog_userid);
|
|
}
|
|
}
|
|
switch ($CFG->apacheloguser) {
|
|
case 3:
|
|
$logname = $apachelog_username;
|
|
break;
|
|
case 2:
|
|
$logname = $apachelog_name;
|
|
break;
|
|
case 1:
|
|
default:
|
|
$logname = $apachelog_userid;
|
|
break;
|
|
}
|
|
apache_note('MOODLEUSER', $logname);
|
|
}
|
|
|
|
/// Adjust ALLOWED_TAGS
|
|
adjust_allowed_tags();
|
|
|
|
|
|
/// Use a custom script replacement if one exists
|
|
if (!empty($CFG->customscripts)) {
|
|
if (($customscript = custom_script_path()) !== false) {
|
|
require ($customscript);
|
|
}
|
|
}
|
|
|
|
|
|
?>
|