lib/setup.php

   1 <?PHP // $Id$
   2 //
   3 // setup.php
   4 //
   5 // Sets up sessions, connects to databases and so on
   6 //
   7 // Normally this is only called by the main config.php file
   8 //
   9 // Normally this file does not need to be edited.
  10 //
  11 //////////////////////////////////////////////////////////////
  12
  13 /// If there are any errors in the standard libraries we want to know!
  14     error_reporting(E_ALL);
  15
  16 /// Connect to the database using adodb
  17
  18     $CFG->libdir   = "$CFG->dirroot/lib";
  19
  20     require_once("$CFG->libdir/adodb/adodb.inc.php"); // Database access functions
  21
  22     $db = &ADONewConnection($CFG->dbtype);
  23
  24     error_reporting(0);  // Hide errors
  25
  26     if (!isset($CFG->dbpersist) or !empty($CFG->dbpersist)) {    // Use persistent connection (default)
  27         $dbconnected = $db->PConnect($CFG->dbhost,$CFG->dbuser,$CFG->dbpass,$CFG->dbname);
  28     } else {                                                     // Use single connection
  29         $dbconnected = $db->Connect($CFG->dbhost,$CFG->dbuser,$CFG->dbpass,$CFG->dbname);
  30     }
  31     if (! $dbconnected) {
  32         echo "<font color=\"#990000\">";
  33         echo "<p>Error: Moodle could not connect to the database.</p>";
  34         echo "<p>It's possible the database itself is just not working at the moment.</p>";
  35         echo "<p>The admin should
  36                  also check that the database details have been correctly specified in config.php</p>";
  37         echo "<p>Database host: $CFG->dbhost<br />";
  38         echo "Database name: $CFG->dbname<br />";
  39         echo "Database user: $CFG->dbuser<br />";
  40         if (!isset($CFG->dbpersist)) {
  41             echo "<p>The admin should also try setting this in config.php:  $"."CFG->dbpersist = false; </p>";
  42         }
  43         echo "</font>";
  44         die;
  45     }
  46
  47     error_reporting(E_ALL);       // Show errors from now on.
  48
  49     if (!isset($CFG->prefix)) {   // Just in case it isn't defined in config.php
  50         $CFG->prefix = "";
  51     }
  52
  53
  54 /// Define admin directory
  55
  56     if (!isset($CFG->admin)) {   // Just in case it isn't defined in config.php
  57         $CFG->admin = 'admin';   // This is relative to the wwwroot and dirroot
  58     }
  59
  60
  61 /// Load up standard libraries
  62
  63     require_once("$CFG->libdir/weblib.php");          // Functions for producing HTML
  64     require_once("$CFG->libdir/datalib.php");         // Functions for accessing databases
  65     require_once("$CFG->libdir/moodlelib.php");       // Other general-purpose functions
  66
  67
  68 /// Load up any configuration from the config table
  69
  70     if ($configs = get_records('config')) {
  71         $CFG = (array)$CFG;
  72         foreach ($configs as $config) {
  73             $CFG[$config->name] = $config->value;
  74         }
  75         $CFG = (object)$CFG;
  76         unset($configs);
  77         unset($config);
  78     }
  79
  80
  81 /// Set error reporting back to normal
  82     if (empty($CFG->debug)) {
  83         $CFG->debug = 7;
  84     }
  85     error_reporting($CFG->debug);
  86
  87
  88 /// File permissions on created directories in the $CFG->dataroot
  89
  90     if (empty($CFG->directorypermissions)) {
  91         $CFG->directorypermissions = 0777;      // Must be octal (that's why it's here)
  92     }
  93
  94
  95 /// Set session timeouts
  96     if (!empty($CFG->sessiontimeout)) {
  97         ini_set('session.gc_maxlifetime', $CFG->sessiontimeout);
  98     }
  99
 100 /// Set sessioncookie variable if it isn't already
 101     if (!isset($CFG->sessioncookie)) {
 102         $CFG->sessioncookie = '';
 103     }
 104
 105 /// Location of standard files
 106
 107     $CFG->wordlist    = "$CFG->libdir/wordlist.txt";
 108     $CFG->javascript  = "$CFG->libdir/javascript.php";
 109     $CFG->moddata     = 'moddata';
 110
 111
 112 /// Load up theme variables (colours etc)
 113
 114     if (!isset($CFG->theme)) {
 115         $CFG->theme = 'standard';
 116     }
 117     include("$CFG->dirroot/theme/$CFG->theme/config.php");
 118
 119     $CFG->stylesheet  = "$CFG->wwwroot/theme/$CFG->theme/styles.php";
 120     $CFG->header      = "$CFG->dirroot/theme/$CFG->theme/header.html";
 121     $CFG->footer      = "$CFG->dirroot/theme/$CFG->theme/footer.html";
 122
 123     if (empty($THEME->custompix)) {
 124         $CFG->pixpath = "$CFG->wwwroot/pix";
 125         $CFG->modpixpath = "$CFG->wwwroot/mod";
 126     } else {
 127         $CFG->pixpath = "$CFG->wwwroot/theme/$CFG->theme/pix";
 128         $CFG->modpixpath = "$CFG->wwwroot/theme/$CFG->theme/pix/mod";
 129     }
 130
 131
 132 /// A hack to get around magic_quotes_gpc being turned off
 133
 134     if (!ini_get_bool('magic_quotes_gpc') ) {
 135         foreach ($_GET as $key => $var) {
 136             if (!is_array($var)) {
 137                 $_GET[$key] = addslashes($var);
 138             } else {
 139                 foreach ($var as $arrkey => $arrvar) {
 140                     $var[$arrkey] = addslashes($arrvar);
 141                 }
 142                 $_GET[$key] = $var;
 143             }
 144         }
 145         foreach ($_POST as $key => $var) {
 146             if (!is_array($var)) {
 147                 $_POST[$key] = addslashes($var);
 148             } else {
 149                 foreach ($var as $arrkey => $arrvar) {
 150                     $var[$arrkey] = addslashes($arrvar);
 151                 }
 152                 $_POST[$key] = $var;
 153             }
 154         }
 155     }
 156
 157
 158 /// The following is a hack to get around the problem of PHP installations
 159 /// that have "register_globals" turned off (default since PHP 4.1.0).
 160 /// Eventually I'll go through and upgrade all the code to make this unnecessary
 161
 162     if (isset($_GET)) {
 163         extract($_GET, EXTR_SKIP);    // Skip existing variables, ie CFG
 164     }
 165     if (isset($_POST)) {
 166         extract($_POST, EXTR_SKIP);   // Skip existing variables, ie CFG
 167     }
 168     if (isset($_SERVER)) {
 169         extract($_SERVER);
 170     }
 171
 172
 173 /// Load up global environment variables
 174
 175     class object {};
 176
 177     if (!isset($nomoodlecookie)) {
 178         session_name('MoodleSession'.$CFG->sessioncookie);
 179         @session_start();
 180         if (! isset($_SESSION['SESSION'])) {
 181             $_SESSION['SESSION'] = new object;
 182         }
 183         if (! isset($_SESSION['USER']))    {
 184             $_SESSION['USER']    = new object;
 185         }
 186
 187         $SESSION = &$_SESSION['SESSION'];   // Makes them easier to reference
 188         $USER    = &$_SESSION['USER'];
 189     }
 190
 191     if (isset($FULLME)) {
 192         $ME = $FULLME;
 193     } else {
 194         $FULLME = qualified_me();
 195         $ME = strip_querystring($FULLME);
 196     }
 197
 198 /// In VERY rare cases old PHP server bugs (it has been found on PHP 4.1.2 running
 199 /// as a CGI under IIS on Windows) may require that you uncomment the following:
 200 //  session_register("USER");
 201 //  session_register("SESSION");
 202
 203
 204 /// Set language/locale of printed times.  If user has chosen a language that
 205 /// that is different from the site language, then use the locale specified
 206 /// in the language file.  Otherwise, if the admin hasn't specified a locale
 207 /// then use the one from the default language.  Otherwise (and this is the
 208 /// majority of cases), use the stored locale specified by admin.
 209
 210     if (isset($_GET['lang'])) {
 211         $SESSION->lang = $lang;
 212     }
 213     if (empty($CFG->lang)) {
 214         $CFG->lang = "en";
 215     }
 216     if (!empty($SESSION->lang) and ($SESSION->lang != $CFG->lang) ) {
 217         $CFG->locale = get_string('locale');
 218     } else if (!empty($USER->lang) and ($USER->lang != $CFG->lang) ) {
 219         $CFG->locale = get_string('locale');
 220     } else if (empty($CFG->locale)) {
 221         $CFG->locale = get_string('locale');
 222         set_config('locale', $CFG->locale);   // cache it to save lookups in future
 223     }
 224     setlocale (LC_TIME, $CFG->locale);
 225     setlocale (LC_COLLATE, $CFG->locale);
 226
 227     if ($CFG->locale != 'tr_TR') {            // To workaround a well-known PHP bug with Turkish
 228         setlocale (LC_CTYPE, $CFG->locale);
 229     }
 230
 231     if (!empty($CFG->opentogoogle)) {
 232         if (empty($_SESSION['USER'])) {
 233             if (!empty($_SERVER['HTTP_USER_AGENT'])) {
 234                 if (strpos($_SERVER['HTTP_USER_AGENT'], 'Googlebot') !== false ) {
 235                     $USER = guest_user();
 236                 }
 237             }
 238             if (empty($_SESSION['USER']) and !empty($_SERVER['HTTP_REFERER'])) {
 239                 if (strpos($_SERVER['HTTP_REFERER'], 'google') !== false ) {
 240                     $USER = guest_user();
 241                 }
 242             }
 243         }
 244     }
 245
 246 ?>