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PHP Cross Reference of Moodle 1.9.3 [Build 15-Oct-2008] |
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1 <?php 2 /** 3 * setup.php - Sets up sessions, connects to databases and so on 4 * 5 * Normally this is only called by the main config.php file 6 * Normally this file does not need to be edited. 7 * @author Martin Dougiamas 8 * @version $Id: setup.php,v 1.212.2.19 2008/08/17 22:22:51 skodak Exp $ 9 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License 10 * @package moodlecore 11 */ 12 13 ////// DOCUMENTATION IN PHPDOC FORMAT FOR MOODLE GLOBALS AND COMMON OBJECT TYPES ///////////// 14 /** 15 * $USER is a global instance of a typical $user record. 16 * 17 * Items found in the user record: 18 * - $USER->emailstop - Does the user want email sent to them? 19 * - $USER->email - The user's email address. 20 * - $USER->id - The unique integer identified of this user in the 'user' table. 21 * - $USER->email - The user's email address. 22 * - $USER->firstname - The user's first name. 23 * - $USER->lastname - The user's last name. 24 * - $USER->username - The user's login username. 25 * - $USER->secret - The user's ?. 26 * - $USER->lang - The user's language choice. 27 * 28 * @global object(user) $USER 29 */ 30 global $USER; 31 /** 32 * This global variable is read in from the 'config' table. 33 * 34 * Some typical settings in the $CFG global: 35 * - $CFG->wwwroot - Path to moodle index directory in url format. 36 * - $CFG->dataroot - Path to moodle index directory on server's filesystem. 37 * - $CFG->libdir - Path to moodle's library folder on server's filesystem. 38 * 39 * @global object(cfg) $CFG 40 */ 41 global $CFG; 42 /** 43 * Definition of session type 44 * @global object(session) $SESSION 45 */ 46 global $SESSION; 47 /** 48 * Definition of shared memory cache 49 */ 50 global $MCACHE; 51 /** 52 * Definition of course type 53 * @global object(course) $COURSE 54 */ 55 global $COURSE; 56 /** 57 * Definition of db type 58 * @global object(db) $db 59 */ 60 global $db; 61 /** 62 * $THEME is a global that defines the site theme. 63 * 64 * Items found in the theme record: 65 * - $THEME->cellheading - Cell colors. 66 * - $THEME->cellheading2 - Alternate cell colors. 67 * 68 * @global object(theme) $THEME 69 */ 70 global $THEME; 71 72 /** 73 * HTTPSPAGEREQUIRED is a global to define if the page being displayed must run under HTTPS. 74 * 75 * It's primary goal is to allow 100% HTTPS pages when $CFG->loginhttps is enabled. Default to false. 76 * It's enabled only by the httpsrequired() function and used in some pages to update some URLs 77 */ 78 global $HTTPSPAGEREQUIRED; 79 80 81 /// First try to detect some attacks on older buggy PHP versions 82 if (isset($_REQUEST['GLOBALS']) || isset($_COOKIE['GLOBALS']) || isset($_FILES['GLOBALS'])) { 83 die('Fatal: Illegal GLOBALS overwrite attempt detected!'); 84 } 85 86 87 if (!isset($CFG->wwwroot)) { 88 trigger_error('Fatal: $CFG->wwwroot is not configured! Exiting.'); 89 die; 90 } 91 92 /// store settings from config.php in array in $CFG - we can use it later to detect problems and overrides 93 $CFG->config_php_settings = (array)$CFG; 94 95 /// Set httpswwwroot default value (this variable will replace $CFG->wwwroot 96 /// inside some URLs used in HTTPSPAGEREQUIRED pages. 97 $CFG->httpswwwroot = $CFG->wwwroot; 98 99 $CFG->libdir = $CFG->dirroot .'/lib'; 100 101 require_once($CFG->libdir .'/setuplib.php'); // Functions that MUST be loaded first 102 103 /// Time to start counting 104 init_performance_info(); 105 106 107 /// If there are any errors in the standard libraries we want to know! 108 error_reporting(E_ALL); 109 110 /// Just say no to link prefetching (Moz prefetching, Google Web Accelerator, others) 111 /// http://www.google.com/webmasters/faq.html#prefetchblock 112 if (!empty($_SERVER['HTTP_X_moz']) && $_SERVER['HTTP_X_moz'] === 'prefetch'){ 113 header($_SERVER['SERVER_PROTOCOL'] . ' 404 Prefetch Forbidden'); 114 trigger_error('Prefetch request forbidden.'); 115 exit; 116 } 117 118 /// Connect to the database using adodb 119 120 /// Set $CFG->dbfamily global 121 /// and configure some other specific variables for each db BEFORE attempting the connection 122 preconfigure_dbconnection(); 123 124 require_once($CFG->libdir .'/adodb/adodb.inc.php'); // Database access functions 125 126 $db = &ADONewConnection($CFG->dbtype); 127 128 // See MDL-6760 for why this is necessary. In Moodle 1.8, once we start using NULLs properly, 129 // we probably want to change this value to ''. 130 $db->null2null = 'A long random string that will never, ever match something we want to insert into the database, I hope. \''; 131 132 error_reporting(0); // Hide errors 133 134 if (!isset($CFG->dbpersist) or !empty($CFG->dbpersist)) { // Use persistent connection (default) 135 $dbconnected = $db->PConnect($CFG->dbhost,$CFG->dbuser,$CFG->dbpass,$CFG->dbname); 136 } else { // Use single connection 137 $dbconnected = $db->Connect($CFG->dbhost,$CFG->dbuser,$CFG->dbpass,$CFG->dbname); 138 } 139 if (! $dbconnected) { 140 // In the name of protocol correctness, monitoring and performance 141 // profiling, set the appropriate error headers for machine comsumption 142 if (isset($_SERVER['SERVER_PROTOCOL'])) { 143 // Avoid it with cron.php. Note that we assume it's HTTP/1.x 144 header($_SERVER['SERVER_PROTOCOL'] . ' 503 Service Unavailable'); 145 } 146 // and then for human consumption... 147 echo '<html><body>'; 148 echo '<table align="center"><tr>'; 149 echo '<td style="color:#990000; text-align:center; font-size:large; border-width:1px; '. 150 ' border-color:#000000; border-style:solid; border-radius: 20px; border-collapse: collapse; '. 151 ' -moz-border-radius: 20px; padding: 15px">'; 152 echo '<p>Error: Database connection failed.</p>'; 153 echo '<p>It is possible that the database is overloaded or otherwise not running properly.</p>'; 154 echo '<p>The site administrator should also check that the database details have been correctly specified in config.php</p>'; 155 echo '</td></tr></table>'; 156 echo '</body></html>'; 157 158 error_log('ADODB Error: '.$db->ErrorMsg()); // see MDL-14628 159 160 if (empty($CFG->noemailever) and !empty($CFG->emailconnectionerrorsto)) { 161 if (file_exists($CFG->dataroot.'/emailcount')){ 162 $fp = fopen($CFG->dataroot.'/emailcount', 'r'); 163 $content = fread($fp, 24); 164 fclose($fp); 165 if((time() - (int)$content) > 600){ 166 mail($CFG->emailconnectionerrorsto, 167 'WARNING: Database connection error: '.$CFG->wwwroot, 168 'Connection error: '.$CFG->wwwroot); 169 $fp = fopen($CFG->dataroot.'/emailcount', 'w'); 170 fwrite($fp, time()); 171 } 172 } else { 173 mail($CFG->emailconnectionerrorsto, 174 'WARNING: Database connection error: '.$CFG->wwwroot, 175 'Connection error: '.$CFG->wwwroot); 176 $fp = fopen($CFG->dataroot.'/emailcount', 'w'); 177 fwrite($fp, time()); 178 } 179 } 180 die; 181 } 182 183 /// Forcing ASSOC mode for ADOdb (some DBs default to FETCH_BOTH) 184 $db->SetFetchMode(ADODB_FETCH_ASSOC); 185 186 /// Starting here we have a correct DB conection but me must avoid 187 /// to execute any DB transaction until "set names" has been executed 188 /// some lines below! 189 190 error_reporting(E_ALL); // Show errors from now on. 191 192 if (!isset($CFG->prefix)) { // Just in case it isn't defined in config.php 193 $CFG->prefix = ''; 194 } 195 196 197 /// Define admin directory 198 199 if (!isset($CFG->admin)) { // Just in case it isn't defined in config.php 200 $CFG->admin = 'admin'; // This is relative to the wwwroot and dirroot 201 } 202 203 /// Increase memory limits if possible 204 raise_memory_limit('96M'); // We should never NEED this much but just in case... 205 206 /// Load up standard libraries 207 208 require_once($CFG->libdir .'/textlib.class.php'); // Functions to handle multibyte strings 209 require_once($CFG->libdir .'/weblib.php'); // Functions for producing HTML 210 require_once($CFG->libdir .'/dmllib.php'); // Functions to handle DB data (DML) 211 require_once($CFG->libdir .'/datalib.php'); // Legacy lib with a big-mix of functions. 212 require_once($CFG->libdir .'/accesslib.php'); // Access control functions 213 require_once($CFG->libdir .'/deprecatedlib.php'); // Deprecated functions included for backward compatibility 214 require_once($CFG->libdir .'/moodlelib.php'); // Other general-purpose functions 215 require_once($CFG->libdir .'/eventslib.php'); // Events functions 216 require_once($CFG->libdir .'/grouplib.php'); // Groups functions 217 218 //point pear include path to moodles lib/pear so that includes and requires will search there for files before anywhere else 219 //the problem is that we need specific version of quickforms and hacked excel files :-( 220 ini_set('include_path', $CFG->libdir.'/pear' . PATH_SEPARATOR . ini_get('include_path')); 221 222 /// Disable errors for now - needed for installation when debug enabled in config.php 223 if (isset($CFG->debug)) { 224 $originalconfigdebug = $CFG->debug; 225 unset($CFG->debug); 226 } else { 227 $originalconfigdebug = -1; 228 } 229 230 /// Set the client/server and connection to utf8 231 /// and configure some other specific variables for each db 232 configure_dbconnection(); 233 234 /// Load up any configuration from the config table 235 $CFG = get_config(); 236 237 /// Turn on SQL logging if required 238 if (!empty($CFG->logsql)) { 239 $db->LogSQL(); 240 } 241 242 /// Prevent warnings from roles when upgrading with debug on 243 if (isset($CFG->debug)) { 244 $originaldatabasedebug = $CFG->debug; 245 unset($CFG->debug); 246 } else { 247 $originaldatabasedebug = -1; 248 } 249 250 251 /// For now, only needed under apache (and probably unstable in other contexts) 252 if (function_exists('register_shutdown_function')) { 253 register_shutdown_function('moodle_request_shutdown'); 254 } 255 256 /// Defining the site 257 if ($SITE = get_site()) { 258 /** 259 * If $SITE global from {@link get_site()} is set then SITEID to $SITE->id, otherwise set to 1. 260 */ 261 define('SITEID', $SITE->id); 262 /// And the 'default' course 263 $COURSE = clone($SITE); // For now. This will usually get reset later in require_login() etc. 264 } else { 265 /** 266 * @ignore 267 */ 268 define('SITEID', 1); 269 /// And the 'default' course 270 $COURSE = new object; // no site created yet 271 $COURSE->id = 1; 272 } 273 274 // define SYSCONTEXTID in config.php if you want to save some queries (after install or upgrade!) 275 if (!defined('SYSCONTEXTID')) { 276 get_system_context(); 277 } 278 279 /// Set error reporting back to normal 280 if ($originaldatabasedebug == -1) { 281 $CFG->debug = DEBUG_MINIMAL; 282 } else { 283 $CFG->debug = $originaldatabasedebug; 284 } 285 if ($originalconfigdebug !== -1) { 286 $CFG->debug = $originalconfigdebug; 287 } 288 unset($originalconfigdebug); 289 unset($originaldatabasedebug); 290 error_reporting($CFG->debug); 291 292 293 /// find out if PHP cofigured to display warnings 294 if (ini_get_bool('display_errors')) { 295 define('WARN_DISPLAY_ERRORS_ENABLED', true); 296 } 297 /// If we want to display Moodle errors, then try and set PHP errors to match 298 if (!isset($CFG->debugdisplay)) { 299 //keep it as is during installation 300 } else if (empty($CFG->debugdisplay)) { 301 @ini_set('display_errors', '0'); 302 @ini_set('log_errors', '1'); 303 } else { 304 @ini_set('display_errors', '1'); 305 } 306 // Even when users want to see errors in the output, 307 // some parts of Moodle cannot display them at all. 308 // (Once we are XHTML strict compliant, debugdisplay 309 // _must_ go away). 310 if (defined('MOODLE_SANE_OUTPUT')) { 311 @ini_set('display_errors', '0'); 312 @ini_set('log_errors', '1'); 313 } 314 315 /// Shared-Memory cache init -- will set $MCACHE 316 /// $MCACHE is a global object that offers at least add(), set() and delete() 317 /// with similar semantics to the memcached PHP API http://php.net/memcache 318 /// Ensure we define rcache - so we can later check for it 319 /// with a really fast and unambiguous $CFG->rcache === false 320 if (!empty($CFG->cachetype)) { 321 if (empty($CFG->rcache)) { 322 $CFG->rcache = false; 323 } else { 324 $CFG->rcache = true; 325 } 326 327 // do not try to initialize if cache disabled 328 if (!$CFG->rcache) { 329 $CFG->cachetype = ''; 330 } 331 332 if ($CFG->cachetype === 'memcached' && !empty($CFG->memcachedhosts)) { 333 if (!init_memcached()) { 334 debugging("Error initialising memcached"); 335 $CFG->cachetype = ''; 336 $CFG->rcache = false; 337 } 338 } else if ($CFG->cachetype === 'eaccelerator') { 339 if (!init_eaccelerator()) { 340 debugging("Error initialising eaccelerator cache"); 341 $CFG->cachetype = ''; 342 $CFG->rcache = false; 343 } 344 } 345 346 } else { // just make sure it is defined 347 $CFG->cachetype = ''; 348 $CFG->rcache = false; 349 } 350 351 /// Set a default enrolment configuration (see bug 1598) 352 if (!isset($CFG->enrol)) { 353 $CFG->enrol = 'manual'; 354 } 355 356 /// Set default enabled enrolment plugins 357 if (!isset($CFG->enrol_plugins_enabled)) { 358 $CFG->enrol_plugins_enabled = 'manual'; 359 } 360 361 /// File permissions on created directories in the $CFG->dataroot 362 363 if (empty($CFG->directorypermissions)) { 364 $CFG->directorypermissions = 0777; // Must be octal (that's why it's here) 365 } 366 367 /// Calculate and set $CFG->ostype to be used everywhere. Possible values are: 368 /// - WINDOWS: for any Windows flavour. 369 /// - UNIX: for the rest 370 /// Also, $CFG->os can continue being used if more specialization is required 371 if (stristr(PHP_OS, 'win') && !stristr(PHP_OS, 'darwin')) { 372 $CFG->ostype = 'WINDOWS'; 373 } else { 374 $CFG->ostype = 'UNIX'; 375 } 376 $CFG->os = PHP_OS; 377 378 /// Set up default frame target string, based on $CFG->framename 379 $CFG->frametarget = frametarget(); 380 381 /// Setup cache dir for Smarty and others 382 if (!file_exists($CFG->dataroot .'/cache')) { 383 make_upload_directory('cache'); 384 } 385 386 /// Set up smarty template system 387 //require_once($CFG->libdir .'/smarty/Smarty.class.php'); 388 //$smarty = new Smarty; 389 //$smarty->template_dir = $CFG->dirroot .'/templates/'. $CFG->template; 390 //if (!file_exists($CFG->dataroot .'/cache/smarty')) { 391 // make_upload_directory('cache/smarty'); 392 //} 393 //$smarty->compile_dir = $CFG->dataroot .'/cache/smarty'; 394 395 /// Set up session handling 396 if(empty($CFG->respectsessionsettings)) { 397 if (empty($CFG->dbsessions)) { /// File-based sessions 398 399 // Some distros disable GC by setting probability to 0 400 // overriding the PHP default of 1 401 // (gc_probability is divided by gc_divisor, which defaults to 1000) 402 if (ini_get('session.gc_probability') == 0) { 403 ini_set('session.gc_probability', 1); 404 } 405 406 if (!empty($CFG->sessiontimeout)) { 407 ini_set('session.gc_maxlifetime', $CFG->sessiontimeout); 408 } 409 410 if (!file_exists($CFG->dataroot .'/sessions')) { 411 make_upload_directory('sessions'); 412 } 413 ini_set('session.save_path', $CFG->dataroot .'/sessions'); 414 415 } else { /// Database sessions 416 ini_set('session.save_handler', 'user'); 417 418 $ADODB_SESSION_DRIVER = $CFG->dbtype; 419 $ADODB_SESSION_CONNECT = $CFG->dbhost; 420 $ADODB_SESSION_USER = $CFG->dbuser; 421 $ADODB_SESSION_PWD = $CFG->dbpass; 422 $ADODB_SESSION_DB = $CFG->dbname; 423 $ADODB_SESSION_TBL = $CFG->prefix.'sessions2'; 424 if (!empty($CFG->sessiontimeout)) { 425 $ADODB_SESS_LIFE = $CFG->sessiontimeout; 426 } 427 428 require_once($CFG->libdir. '/adodb/session/adodb-session2.php'); 429 } 430 } 431 /// Set sessioncookie and sessioncookiepath variable if it isn't already 432 if (!isset($CFG->sessioncookie)) { 433 $CFG->sessioncookie = ''; 434 } 435 if (!isset($CFG->sessioncookiepath)) { 436 $CFG->sessioncookiepath = '/'; 437 } 438 439 /// Configure ampersands in URLs 440 441 @ini_set('arg_separator.output', '&'); 442 443 /// Work around for a PHP bug see MDL-11237 444 445 @ini_set('pcre.backtrack_limit', 20971520); // 20 MB 446 447 /// Location of standard files 448 449 $CFG->wordlist = $CFG->libdir .'/wordlist.txt'; 450 $CFG->javascript = $CFG->libdir .'/javascript.php'; 451 $CFG->moddata = 'moddata'; 452 453 // Alas, in some cases we cannot deal with magic_quotes. 454 if (defined('MOODLE_SANE_INPUT') && ini_get_bool('magic_quotes_gpc')) { 455 mdie("Facilities that require MOODLE_SANE_INPUT " 456 . "cannot work with magic_quotes_gpc. Please disable " 457 . "magic_quotes_gpc."); 458 } 459 /// A hack to get around magic_quotes_gpc being turned off 460 /// It is strongly recommended to enable "magic_quotes_gpc"! 461 if (!ini_get_bool('magic_quotes_gpc') && !defined('MOODLE_SANE_INPUT') ) { 462 function addslashes_deep($value) { 463 $value = is_array($value) ? 464 array_map('addslashes_deep', $value) : 465 addslashes($value); 466 return $value; 467 } 468 $_POST = array_map('addslashes_deep', $_POST); 469 $_GET = array_map('addslashes_deep', $_GET); 470 $_COOKIE = array_map('addslashes_deep', $_COOKIE); 471 $_REQUEST = array_map('addslashes_deep', $_REQUEST); 472 if (!empty($_SERVER['REQUEST_URI'])) { 473 $_SERVER['REQUEST_URI'] = addslashes($_SERVER['REQUEST_URI']); 474 } 475 if (!empty($_SERVER['QUERY_STRING'])) { 476 $_SERVER['QUERY_STRING'] = addslashes($_SERVER['QUERY_STRING']); 477 } 478 if (!empty($_SERVER['HTTP_REFERER'])) { 479 $_SERVER['HTTP_REFERER'] = addslashes($_SERVER['HTTP_REFERER']); 480 } 481 if (!empty($_SERVER['PATH_INFO'])) { 482 $_SERVER['PATH_INFO'] = addslashes($_SERVER['PATH_INFO']); 483 } 484 if (!empty($_SERVER['PHP_SELF'])) { 485 $_SERVER['PHP_SELF'] = addslashes($_SERVER['PHP_SELF']); 486 } 487 if (!empty($_SERVER['PATH_TRANSLATED'])) { 488 $_SERVER['PATH_TRANSLATED'] = addslashes($_SERVER['PATH_TRANSLATED']); 489 } 490 } 491 492 493 /// The following code can emulate "register globals" if required. 494 /// This hack is no longer being applied as of Moodle 1.6 unless you really 495 /// really want to use it (by defining $CFG->enableglobalshack = true) 496 497 if (!empty($CFG->enableglobalshack) && !defined('MOODLE_SANE_INPUT')) { 498 if (!empty($CFG->detect_unchecked_vars)) { 499 global $UNCHECKED_VARS; 500 $UNCHECKED_VARS->url = $_SERVER['PHP_SELF']; 501 $UNCHECKED_VARS->vars = array(); 502 } 503 if (isset($_GET)) { 504 extract($_GET, EXTR_SKIP); // Skip existing variables, ie CFG 505 if (!empty($CFG->detect_unchecked_vars)) { 506 foreach ($_GET as $key => $val) { 507 $UNCHECKED_VARS->vars[$key]=$val; 508 } 509 } 510 } 511 if (isset($_POST)) { 512 extract($_POST, EXTR_SKIP); // Skip existing variables, ie CFG 513 if (!empty($CFG->detect_unchecked_vars)) { 514 foreach ($_POST as $key => $val) { 515 $UNCHECKED_VARS->vars[$key]=$val; 516 } 517 } 518 } 519 if (isset($_SERVER)) { 520 extract($_SERVER); 521 } 522 } 523 524 525 /// Load up global environment variables 526 527 if (!isset($CFG->cookiesecure) or strpos($CFG->wwwroot, 'https://') !== 0) { 528 $CFG->cookiesecure = false; 529 } 530 531 if (!isset($CFG->cookiehttponly)) { 532 $CFG->cookiehttponly = false; 533 } 534 535 //discard session ID from POST, GET and globals to tighten security, 536 //this session fixation prevention can not be used in cookieless mode 537 if (empty($CFG->usesid) && !defined('MOODLE_SANE_INPUT')) { 538 unset(${'MoodleSession'.$CFG->sessioncookie}); 539 unset($_GET['MoodleSession'.$CFG->sessioncookie]); 540 unset($_POST['MoodleSession'.$CFG->sessioncookie]); 541 } 542 //compatibility hack for Moodle Cron, cookies not deleted, but set to "deleted" - should not be needed with $nomoodlecookie in cron.php now 543 if (!empty($_COOKIE['MoodleSession'.$CFG->sessioncookie]) && $_COOKIE['MoodleSession'.$CFG->sessioncookie] == "deleted") { 544 unset($_COOKIE['MoodleSession'.$CFG->sessioncookie]); 545 } 546 if (!empty($_COOKIE['MoodleSessionTest'.$CFG->sessioncookie]) && $_COOKIE['MoodleSessionTest'.$CFG->sessioncookie] == "deleted") { 547 unset($_COOKIE['MoodleSessionTest'.$CFG->sessioncookie]); 548 } 549 if (!empty($CFG->usesid) && empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) { 550 require_once("$CFG->dirroot/lib/cookieless.php"); 551 sid_start_ob(); 552 } 553 554 if (empty($nomoodlecookie)) { 555 session_name('MoodleSession'.$CFG->sessioncookie); 556 if (check_php_version('5.2.0')) { 557 session_set_cookie_params(0, $CFG->sessioncookiepath, '', $CFG->cookiesecure, $CFG->cookiehttponly); 558 } else { 559 session_set_cookie_params(0, $CFG->sessioncookiepath, '', $CFG->cookiesecure); 560 } 561 @session_start(); 562 if (! isset($_SESSION['SESSION'])) { 563 $_SESSION['SESSION'] = new object; 564 $_SESSION['SESSION']->session_test = random_string(10); 565 if (!empty($_COOKIE['MoodleSessionTest'.$CFG->sessioncookie])) { 566 $_SESSION['SESSION']->has_timed_out = true; 567 } 568 if (check_php_version('5.2.0')) { 569 setcookie('MoodleSessionTest'.$CFG->sessioncookie, $_SESSION['SESSION']->session_test, 0, $CFG->sessioncookiepath, '', $CFG->cookiesecure, $CFG->cookiehttponly); 570 } else { 571 setcookie('MoodleSessionTest'.$CFG->sessioncookie, $_SESSION['SESSION']->session_test, 0, $CFG->sessioncookiepath, '', $CFG->cookiesecure); 572 } 573 $_COOKIE['MoodleSessionTest'.$CFG->sessioncookie] = $_SESSION['SESSION']->session_test; 574 } 575 if (! isset($_SESSION['USER'])) { 576 $_SESSION['USER'] = new object; 577 } 578 579 $SESSION = &$_SESSION['SESSION']; // Makes them easier to reference 580 $USER = &$_SESSION['USER']; 581 if (!isset($USER->id)) { 582 $USER->id = 0; // to enable proper function of $CFG->notloggedinroleid hack 583 } 584 } 585 else { 586 $SESSION = NULL; 587 $USER = new object(); 588 $USER->id = 0; // user not logged in when session disabled 589 if (isset($CFG->mnet_localhost_id)) { 590 $USER->mnethostid = $CFG->mnet_localhost_id; 591 } 592 } 593 594 if (defined('FULLME')) { // Usually in command-line scripts like admin/cron.php 595 $FULLME = FULLME; 596 $ME = FULLME; 597 } else { 598 $FULLME = qualified_me(); 599 $ME = strip_querystring($FULLME); 600 } 601 602 /// In VERY rare cases old PHP server bugs (it has been found on PHP 4.1.2 running 603 /// as a CGI under IIS on Windows) may require that you uncomment the following: 604 // session_register("USER"); 605 // session_register("SESSION"); 606 607 608 609 /// Load up theme variables (colours etc) 610 611 if (!isset($CFG->themedir)) { 612 $CFG->themedir = $CFG->dirroot.'/theme'; 613 $CFG->themewww = $CFG->wwwroot.'/theme'; 614 } 615 $CFG->httpsthemewww = $CFG->themewww; 616 617 if (isset($_GET['theme'])) { 618 if ($CFG->allowthemechangeonurl || confirm_sesskey()) { 619 $themename = clean_param($_GET['theme'], PARAM_SAFEDIR); 620 if (($themename != '') and file_exists($CFG->themedir.'/'.$themename)) { 621 $SESSION->theme = $themename; 622 } 623 unset($themename); 624 } 625 } 626 627 if (!isset($CFG->theme)) { 628 $CFG->theme = 'standardwhite'; 629 } 630 631 /// now do a session test to prevent random user switching - observed on some PHP/Apache combinations, 632 /// disable checks when working in cookieless mode 633 if (empty($CFG->usesid) || !empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) { 634 if ($SESSION != NULL) { 635 if (empty($_COOKIE['MoodleSessionTest'.$CFG->sessioncookie])) { 636 report_session_error(); 637 } else if (isset($SESSION->session_test) && $_COOKIE['MoodleSessionTest'.$CFG->sessioncookie] != $SESSION->session_test) { 638 report_session_error(); 639 } 640 } 641 } 642 643 644 /// Set language/locale of printed times. If user has chosen a language that 645 /// that is different from the site language, then use the locale specified 646 /// in the language file. Otherwise, if the admin hasn't specified a locale 647 /// then use the one from the default language. Otherwise (and this is the 648 /// majority of cases), use the stored locale specified by admin. 649 if ($SESSION !== NULL && isset($_GET['lang']) && ($lang = clean_param($_GET['lang'], PARAM_SAFEDIR))) { 650 if (file_exists($CFG->dataroot .'/lang/'. $lang) or file_exists($CFG->dirroot .'/lang/'. $lang)) { 651 $SESSION->lang = $lang; 652 } else if (file_exists($CFG->dataroot.'/lang/'.$lang.'_utf8') or 653 file_exists($CFG->dirroot .'/lang/'.$lang.'_utf8')) { 654 $SESSION->lang = $lang.'_utf8'; 655 } 656 } 657 658 setup_lang_from_browser(); 659 660 unset($lang); 661 662 if (empty($CFG->lang)) { 663 if (empty($SESSION->lang)) { 664 $CFG->lang = 'en_utf8'; 665 } else { 666 $CFG->lang = $SESSION->lang; 667 } 668 } 669 670 // set default locale and themes - might be changed again later from require_login() 671 course_setup(); 672 673 if (!empty($CFG->opentogoogle)) { 674 if (empty($USER->id)) { // Ignore anyone logged in 675 if (!empty($_SERVER['HTTP_USER_AGENT'])) { 676 if (strpos($_SERVER['HTTP_USER_AGENT'], 'Googlebot') !== false ) { 677 $USER = guest_user(); 678 } else if (strpos($_SERVER['HTTP_USER_AGENT'], 'google.com') !== false ) { // Google 679 $USER = guest_user(); 680 } else if (strpos($_SERVER['HTTP_USER_AGENT'], 'Yahoo! Slurp') !== false ) { // Yahoo 681 $USER = guest_user(); 682 } else if (strpos($_SERVER['HTTP_USER_AGENT'], '[ZSEBOT]') !== false ) { // Zoomspider 683 $USER = guest_user(); 684 } else if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSNBOT') !== false ) { // MSN Search 685 $USER = guest_user(); 686 } 687 } 688 if (empty($USER) && !empty($_SERVER['HTTP_REFERER'])) { 689 if (strpos($_SERVER['HTTP_REFERER'], 'google') !== false ) { 690 $USER = guest_user(); 691 } else if (strpos($_SERVER['HTTP_REFERER'], 'altavista') !== false ) { 692 $USER = guest_user(); 693 } 694 } 695 if (!empty($USER)) { 696 load_all_capabilities(); 697 } 698 } 699 } 700 701 if ($CFG->theme == 'standard' or $CFG->theme == 'standardwhite') { // Temporary measure to help with XHTML validation 702 if (isset($_SERVER['HTTP_USER_AGENT']) and empty($_SESSION['USER']->id)) { // Allow W3CValidator in as user called w3cvalidator (or guest) 703 if ((strpos($_SERVER['HTTP_USER_AGENT'], 'W3C_Validator') !== false) or 704 (strpos($_SERVER['HTTP_USER_AGENT'], 'Cynthia') !== false )) { 705 if ($USER = get_complete_user_data("username", "w3cvalidator")) { 706 $USER->ignoresesskey = true; 707 } else { 708 $USER = guest_user(); 709 } 710 } 711 } 712 } 713 714 /// Apache log intergration. In apache conf file one can use ${MOODULEUSER}n in 715 /// LogFormat to get the current logged in username in moodle. 716 if ($USER && function_exists('apache_note') 717 && !empty($CFG->apacheloguser) && isset($USER->username)) { 718 $apachelog_userid = $USER->id; 719 $apachelog_username = clean_filename($USER->username); 720 $apachelog_name = ''; 721 if (isset($USER->firstname)) { 722 // We can assume both will be set 723 // - even if to empty. 724 $apachelog_name = clean_filename($USER->firstname . " " . 725 $USER->lastname); 726 } 727 if (isset($USER->realuser)) { 728 if ($realuser = get_record('user', 'id', $USER->realuser)) { 729 $apachelog_username = clean_filename($realuser->username." as ".$apachelog_username); 730 $apachelog_name = clean_filename($realuser->firstname." ".$realuser->lastname ." as ".$apachelog_name); 731 $apachelog_userid = clean_filename($realuser->id." as ".$apachelog_userid); 732 } 733 } 734 switch ($CFG->apacheloguser) { 735 case 3: 736 $logname = $apachelog_username; 737 break; 738 case 2: 739 $logname = $apachelog_name; 740 break; 741 case 1: 742 default: 743 $logname = $apachelog_userid; 744 break; 745 } 746 apache_note('MOODLEUSER', $logname); 747 } 748 749 /// Adjust ALLOWED_TAGS 750 adjust_allowed_tags(); 751 752 753 /// Use a custom script replacement if one exists 754 if (!empty($CFG->customscripts)) { 755 if (($customscript = custom_script_path()) !== false) { 756 require ($customscript); 757 } 758 } 759 760 /// note: we can not block non utf-8 installatrions here, because empty mysql database 761 /// might be converted to utf-8 in admin/index.php during installation 762 ?>
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| Generated: Wed Jan 14 11:33:29 2009 | Cross-referenced by PHPXref 0.7 |