global.inc.php 21 KB

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  1. <?php
  2. /* For licensing terms, see /license.txt */
  3. /**
  4. * It is recommended that ALL Chamilo scripts include this important file.
  5. * This script manages
  6. * - http get, post, post_files, session, server-vars extraction into global namespace;
  7. * (which doesn't occur anymore when servertype config setting is set to test,
  8. * and which will disappear completely in Dokeos 1.6.1)
  9. * - include of /conf/configuration.php;
  10. * - include of several libraries: main_api, database, display, text, security;
  11. * - selecting the main database;
  12. * - include of language files.
  13. *
  14. * @package chamilo.include
  15. * @todo isn't configuration.php renamed to configuration.inc.php yet?
  16. * @todo use the $_configuration array for all the needed variables
  17. * @todo remove the code that displays the button that links to the install page
  18. * but use a redirect immediately. By doing so the $already_installed variable can be removed.
  19. * @todo make it possible to enable / disable the tracking through the Chamilo config page.
  20. *
  21. */
  22. // Showing/hiding error codes in global error messages.
  23. define('SHOW_ERROR_CODES', false);
  24. // PHP version requirement.
  25. define('REQUIRED_PHP_VERSION', '5');
  26. // Determine the directory path where this current file lies.
  27. // This path will be useful to include the other intialisation files.
  28. $includePath = dirname(__FILE__);
  29. // PHP version check.
  30. if (!function_exists('version_compare') || version_compare(phpversion(), REQUIRED_PHP_VERSION, '<')) {
  31. $global_error_code = 1;
  32. // Incorrect PHP version.
  33. require $includePath.'/global_error_message.inc.php';
  34. die();
  35. }
  36. // @todo Isn't this file renamed to configuration.inc.php yet?
  37. // Include the main Chamilo platform configuration file.
  38. $main_configuration_file_path = $includePath.'/conf/configuration.php';
  39. $already_installed = false;
  40. if (file_exists($main_configuration_file_path)) {
  41. require_once $main_configuration_file_path;
  42. $already_installed = true;
  43. } else {
  44. $_configuration = array();
  45. }
  46. //Redirects to the main/install/ page
  47. if (!$already_installed) {
  48. $global_error_code = 2;
  49. // The system has not been installed yet.
  50. require $includePath.'/global_error_message.inc.php';
  51. die();
  52. }
  53. // Ensure that _configuration is in the global scope before loading
  54. // main_api.lib.php. This is particularly helpful for unit tests
  55. if (!isset($GLOBALS['_configuration'])) {
  56. $GLOBALS['_configuration'] = $_configuration;
  57. }
  58. // Code for trnasitional purposes, it can be removed right before the 1.8.7 release.
  59. if (empty($_configuration['system_version'])) {
  60. $_configuration['system_version'] = $_configuration['dokeos_version'];
  61. $_configuration['system_stable'] = $_configuration['dokeos_stable'];
  62. $_configuration['software_url'] = 'http://www.chamilo.org/';
  63. }
  64. // For backward compatibility.
  65. $_configuration['dokeos_version'] = $_configuration['system_version'];
  66. $_configuration['dokeos_stable'] = $_configuration['system_stable'];
  67. // Include the main Chamilo platform library file.
  68. require_once $includePath.'/lib/main_api.lib.php';
  69. // Do not over-use this variable. It is only for this script's local use.
  70. $lib_path = api_get_path(LIBRARY_PATH);
  71. // Fix bug in IIS that doesn't fill the $_SERVER['REQUEST_URI'].
  72. api_request_uri();
  73. // Add the path to the pear packages to the include path
  74. ini_set('include_path', api_create_include_path_setting());
  75. // This is for compatibility with MAC computers.
  76. ini_set('auto_detect_line_endings', '1');
  77. // Include the libraries that are necessary everywhere
  78. require_once $lib_path.'database.lib.php';
  79. require_once $lib_path.'display.lib.php';
  80. require_once $lib_path.'text.lib.php';
  81. require_once $lib_path.'image.lib.php';
  82. require_once $lib_path.'array.lib.php';
  83. require_once $lib_path.'security.lib.php';
  84. require_once $lib_path.'events.lib.inc.php';
  85. require_once $lib_path.'debug.lib.php';
  86. require_once $lib_path.'usermanager.lib.php';
  87. /* DATABASE CONNECTION */
  88. // @todo: this shouldn't be done here. It should be stored correctly during installation.
  89. if (empty($_configuration['statistics_database']) && $already_installed) {
  90. $_configuration['statistics_database'] = $_configuration['main_database'];
  91. }
  92. global $database_connection;
  93. // Connect to the server database and select the main chamilo database.
  94. if (!($conn_return = @Database::connect(
  95. array(
  96. 'server' => $_configuration['db_host'],
  97. 'username' => $_configuration['db_user'],
  98. 'password' => $_configuration['db_password'],
  99. 'persistent' => $_configuration['db_persistent_connection'] // When $_configuration['db_persistent_connection'] is set, it is expected to be a boolean type.
  100. )))) {
  101. $global_error_code = 3;
  102. // The database server is not available or credentials are invalid.
  103. require $includePath.'/global_error_message.inc.php';
  104. die();
  105. }
  106. if (!$_configuration['db_host']) {
  107. $global_error_code = 4;
  108. // A configuration option about database server is missing.
  109. require $includePath.'/global_error_message.inc.php';
  110. die();
  111. }
  112. /* RETRIEVING ALL THE CHAMILO CONFIG SETTINGS FOR MULTIPLE URLs FEATURE*/
  113. if (!empty($_configuration['multiple_access_urls'])) {
  114. $_configuration['access_url'] = 1;
  115. $access_urls = api_get_access_urls();
  116. $protocol = ((!empty($_SERVER['HTTPS']) && strtoupper($_SERVER['HTTPS']) != 'OFF') ? 'https' : 'http').'://';
  117. $request_url1 = $protocol.$_SERVER['SERVER_NAME'].'/';
  118. $request_url2 = $protocol.$_SERVER['HTTP_HOST'].'/';
  119. foreach ($access_urls as & $details) {
  120. if ($request_url1 == $details['url'] or $request_url2 == $details['url']) {
  121. $_configuration['access_url'] = $details['id'];
  122. }
  123. }
  124. } else {
  125. $_configuration['access_url'] = 1;
  126. }
  127. // The system has not been designed to use special SQL modes that were introduced since MySQL 5.
  128. Database::query("set session sql_mode='';");
  129. if (!Database::select_db($_configuration['main_database'], $database_connection)) {
  130. $global_error_code = 5;
  131. // Connection to the main Chamilo database is impossible, it might be missing or restricted or its configuration option might be incorrect.
  132. require $includePath.'/global_error_message.inc.php';
  133. die();
  134. }
  135. /* Initialization of the default encodings */
  136. // The platform's character set must be retrieved at this early moment.
  137. $sql = "SELECT selected_value FROM settings_current WHERE variable = 'platform_charset';";
  138. $result = Database::query($sql);
  139. while ($row = @Database::fetch_array($result)) {
  140. $charset = $row[0];
  141. }
  142. if (empty($charset)) {
  143. $charset = 'UTF-8';
  144. }
  145. // Preserving the value of the global variable $charset.
  146. $charset_initial_value = $charset;
  147. // Initialization of the internationalization library.
  148. api_initialize_internationalization();
  149. // Initialization of the default encoding that will be used by the multibyte string routines in the internationalization library.
  150. api_set_internationalization_default_encoding($charset);
  151. // Initialization of the database encoding to be used.
  152. Database::query("SET SESSION character_set_server='utf8';");
  153. Database::query("SET SESSION collation_server='utf8_general_ci';");
  154. if (api_is_utf8($charset)) {
  155. // See Bug #1802: For UTF-8 systems we prefer to use "SET NAMES 'utf8'" statement in order to avoid a bizarre problem with Chinese language.
  156. Database::query("SET NAMES 'utf8';");
  157. } else {
  158. Database::query("SET CHARACTER SET '" . Database::to_db_encoding($charset) . "';");
  159. }
  160. // Start session after the internationalization library has been initialized.
  161. api_session_start($already_installed);
  162. // access_url == 1 is the default chamilo location
  163. if ($_configuration['access_url'] != 1) {
  164. $url_info = api_get_access_url($_configuration['access_url']);
  165. if ($url_info['active'] == 1) {
  166. $settings_by_access = & api_get_settings(null, 'list', $_configuration['access_url'], 1);
  167. foreach ($settings_by_access as & $row) {
  168. if (empty($row['variable'])) {
  169. $row['variable'] = 0;
  170. }
  171. if (empty($row['subkey'])) {
  172. $row['subkey'] = 0;
  173. }
  174. if (empty($row['category'])) {
  175. $row['category'] = 0;
  176. }
  177. $settings_by_access_list[$row['variable']][$row['subkey']][$row['category']] = $row;
  178. }
  179. }
  180. }
  181. $result = & api_get_settings(null, 'list', 1);
  182. foreach ($result as & $row) {
  183. if ($_configuration['access_url'] != 1) {
  184. if ($url_info['active'] == 1) {
  185. $var = empty($row['variable']) ? 0 : $row['variable'];
  186. $subkey = empty($row['subkey']) ? 0 : $row['subkey'];
  187. $category = empty($row['category']) ? 0 : $row['category'];
  188. }
  189. if ($row['access_url_changeable'] == 1 && $url_info['active'] == 1) {
  190. if ($settings_by_access_list[$var][$subkey][$category]['selected_value'] != '') {
  191. if ($row['subkey'] == null) {
  192. $_setting[$row['variable']] = $settings_by_access_list[$var][$subkey][$category]['selected_value'];
  193. } else {
  194. $_setting[$row['variable']][$row['subkey']] = $settings_by_access_list[$var][$subkey][$category]['selected_value'];
  195. }
  196. } else {
  197. if ($row['subkey'] == null) {
  198. $_setting[$row['variable']] = $row['selected_value'];
  199. } else {
  200. $_setting[$row['variable']][$row['subkey']] = $row['selected_value'];
  201. }
  202. }
  203. } else {
  204. if ($row['subkey'] == null) {
  205. $_setting[$row['variable']] = $row['selected_value'];
  206. } else {
  207. $_setting[$row['variable']][$row['subkey']] = $row['selected_value'];
  208. }
  209. }
  210. } else {
  211. if ($row['subkey'] == null) {
  212. $_setting[$row['variable']] = $row['selected_value'];
  213. } else {
  214. $_setting[$row['variable']][$row['subkey']] = $row['selected_value'];
  215. }
  216. }
  217. }
  218. $result = & api_get_settings('Plugins', 'list', $_configuration['access_url']);
  219. $_plugins = array();
  220. foreach ($result as & $row) {
  221. $key = & $row['variable'];
  222. if (is_string($_setting[$key])) {
  223. $_setting[$key] = array();
  224. }
  225. $_setting[$key][] = $row['selected_value'];
  226. $_plugins[$key][] = $row['selected_value'];
  227. }
  228. // Load allowed tag definitions for kses and/or HTMLPurifier.
  229. require_once $lib_path.'formvalidator/Rule/allowed_tags.inc.php';
  230. // Load HTMLPurifier.
  231. //require_once $lib_path.'htmlpurifier/library/HTMLPurifier.auto.php'; // It will be loaded later, in a lazy manner.
  232. // include the local (contextual) parameters of this course or section
  233. require $includePath.'/local.inc.php';
  234. // ===== "who is logged in?" module section =====
  235. require_once $lib_path.'online.inc.php';
  236. // check and modify the date of user in the track.e.online table
  237. if (!$x = strpos($_SERVER['PHP_SELF'], 'whoisonline.php')) {
  238. LoginCheck(isset($_user['user_id']) ? $_user['user_id'] : '');
  239. }
  240. // ===== end "who is logged in?" module section =====
  241. if (api_get_setting('server_type') == 'test') {
  242. /*
  243. Server type is test
  244. - high error reporting level
  245. - only do addslashes on $_GET and $_POST
  246. */
  247. if (IS_PHP_53) {
  248. error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);
  249. } else {
  250. error_reporting(E_ALL & ~E_NOTICE);
  251. }
  252. //error_reporting(E_ALL);
  253. //Addslashes to all $_GET variables
  254. foreach ($_GET as $key => $val) {
  255. if (!ini_get('magic_quotes_gpc')) {
  256. if (is_string($val)) {
  257. $_GET[$key] = addslashes($val);
  258. }
  259. }
  260. }
  261. //Addslashes to all $_POST variables
  262. foreach ($_POST as $key => $val) {
  263. if (!ini_get('magic_quotes_gpc')) {
  264. if (is_string($val)) {
  265. $_POST[$key] = addslashes($val);
  266. }
  267. }
  268. }
  269. } else {
  270. /*
  271. Server type is not test
  272. - normal error reporting level
  273. - full fake register globals block
  274. */
  275. error_reporting(E_COMPILE_ERROR | E_ERROR | E_CORE_ERROR);
  276. // TODO: These obsolete variables $HTTP_* to be check whether they are actually used.
  277. if (!isset($HTTP_GET_VARS)) { $HTTP_GET_VARS = $_GET; }
  278. if (!isset($HTTP_POST_VARS)) { $HTTP_POST_VARS = $_POST; }
  279. if (!isset($HTTP_POST_FILES)) { $HTTP_POST_FILES = $_FILES; }
  280. if (!isset($HTTP_SESSION_VARS)) { $HTTP_SESSION_VARS = $_SESSION; }
  281. if (!isset($HTTP_SERVER_VARS)) { $HTTP_SERVER_VARS = $_SERVER; }
  282. // Register SESSION variables into $GLOBALS
  283. if (sizeof($HTTP_SESSION_VARS)) {
  284. if (!is_array($_SESSION)) {
  285. $_SESSION = array();
  286. }
  287. foreach ($HTTP_SESSION_VARS as $key => $val) {
  288. $_SESSION[$key] = $HTTP_SESSION_VARS[$key];
  289. $GLOBALS[$key] = $HTTP_SESSION_VARS[$key];
  290. }
  291. }
  292. // Register SERVER variables into $GLOBALS
  293. if (sizeof($HTTP_SERVER_VARS)) {
  294. $_SERVER = array();
  295. foreach ($HTTP_SERVER_VARS as $key => $val) {
  296. $_SERVER[$key] = $HTTP_SERVER_VARS[$key];
  297. if (!isset($_SESSION[$key]) && $key != 'includePath' && $key != 'rootSys' && $key!= 'clarolineRepositorySys' && $key!= 'lang_path' && $key!= 'extAuthSource' && $key!= 'thisAuthSource' && $key!= 'main_configuration_file_path' && $key!= 'phpDigIncCn' && $key!= 'drs') {
  298. $GLOBALS[$key]=$HTTP_SERVER_VARS[$key];
  299. }
  300. }
  301. }
  302. }
  303. /* LOAD LANGUAGE FILES SECTION */
  304. // if we use the javascript version (without go button) we receive a get
  305. // if we use the non-javascript version (with the go button) we receive a post
  306. $user_language = '';
  307. if (!empty($_GET['language'])) {
  308. $user_language = $_GET['language'];
  309. }
  310. if (!empty($_POST['language_list'])) {
  311. $user_language = str_replace('index.php?language=', '', $_POST['language_list']);
  312. }
  313. // Include all files (first english and then current interface language)
  314. $langpath = api_get_path(SYS_LANG_PATH);
  315. /* This will only work if we are in the page to edit a sub_language */
  316. if (api_get_self() == api_get_path(REL_PATH).'main/admin/sub_language.php' || api_get_self() == api_get_path(REL_PATH).'main/admin/sub_language_ajax.inc.php') {
  317. require_once '../admin/sub_language.class.php';
  318. // getting the arrays of files i.e notification, trad4all, etc
  319. $language_files_to_load = SubLanguageManager:: get_lang_folder_files_list(api_get_path(SYS_LANG_PATH).'english', true);
  320. //getting parent info
  321. $parent_language = SubLanguageManager::get_all_information_of_language(intval($_REQUEST['id']));
  322. //getting sub language info
  323. $sub_language = SubLanguageManager::get_all_information_of_language(intval($_REQUEST['sub_language_id']));
  324. $english_language_array = $parent_language_array = $sub_language_array = array();
  325. foreach ($language_files_to_load as $language_file_item) {
  326. $lang_list_pre = array_keys($GLOBALS);
  327. include $langpath.'english/'.$language_file_item.'.inc.php'; //loading english
  328. $lang_list_post = array_keys($GLOBALS);
  329. $lang_list_result = array_diff($lang_list_post, $lang_list_pre);
  330. unset($lang_list_pre);
  331. // english language array
  332. $english_language_array[$language_file_item] = compact($lang_list_result);
  333. //cleaning the variables
  334. foreach($lang_list_result as $item) {
  335. unset(${$item});
  336. }
  337. $parent_file = $langpath.$parent_language['dokeos_folder'].'/'.$language_file_item.'.inc.php';
  338. if (is_file($parent_file)) {
  339. include_once $parent_file;
  340. }
  341. // parent language array
  342. $parent_language_array[$language_file_item] = compact($lang_list_result);
  343. //cleaning the variables
  344. foreach($lang_list_result as $item) {
  345. unset(${$item});
  346. }
  347. $sub_file = $langpath.$sub_language['dokeos_folder'].'/'.$language_file_item.'.inc.php';
  348. if (is_file($sub_file)) {
  349. include $sub_file;
  350. }
  351. // sub language array
  352. $sub_language_array[$language_file_item] = compact($lang_list_result);
  353. //cleaning the variables
  354. foreach($lang_list_result as $item) {
  355. unset(${$item});
  356. }
  357. }
  358. }
  359. // Checking if we have a valid language. If not we set it to the platform language.
  360. $valid_languages = api_get_languages();
  361. if (!empty($valid_languages)) {
  362. if (!in_array($user_language, $valid_languages['folder'])) {
  363. $user_language = api_get_setting('platformLanguage');
  364. }
  365. if (in_array($user_language, $valid_languages['folder']) && (isset($_GET['language']) || isset($_POST['language_list']))) {
  366. $user_selected_language = $user_language; // $_GET['language'];
  367. $_SESSION['user_language_choice'] = $user_selected_language;
  368. $platformLanguage = $user_selected_language;
  369. } else {
  370. $platformLanguage = api_get_setting('platformLanguage');
  371. }
  372. if (isset($_SESSION['user_language_choice'])) {
  373. $language_interface = $_SESSION['user_language_choice'];
  374. } else {
  375. $language_interface = api_get_setting('platformLanguage');
  376. }
  377. if (isset($_user['language'])) {
  378. $language_interface = $_user['language'];
  379. }
  380. if ($_course['language']) {
  381. $language_interface = $_course['language'];
  382. }
  383. }
  384. // Sometimes the variable $language_interface is changed
  385. // temporarily for achieving translation in different language.
  386. // We need to save the genuine value of this variable and
  387. // to use it within the function get_lang(...).
  388. $language_interface_initial_value = $language_interface;
  389. /**
  390. * Include all necessary language files
  391. * - trad4all
  392. * - notification
  393. * - custom tool language files
  394. */
  395. $language_files = array();
  396. $language_files[] = 'trad4all';
  397. $language_files[] = 'notification';
  398. $language_files[] = 'accessibility';
  399. if (isset($language_file)) {
  400. if (!is_array($language_file)) {
  401. $language_files[] = $language_file;
  402. } else {
  403. $language_files = array_merge($language_files, $language_file);
  404. }
  405. }
  406. // if a set of language files has been properly defined
  407. if (is_array($language_files)) {
  408. // if the sub-language feature is on
  409. if (api_get_setting('allow_use_sub_language') == 'true') {
  410. require_once api_get_path(SYS_CODE_PATH).'admin/sub_language.class.php';
  411. $parent_path = SubLanguageManager::get_parent_language_path($language_interface);
  412. foreach ($language_files as $index => $language_file) {
  413. // include English
  414. include $langpath.'english/'.$language_file.'.inc.php';
  415. // prepare string for current language and its parent
  416. $lang_file = $langpath.$language_interface.'/'.$language_file.'.inc.php';
  417. $parent_lang_file = $langpath.$parent_path.'/'.$language_file.'.inc.php';
  418. // load the parent language file first
  419. if (file_exists($parent_lang_file)) {
  420. include $parent_lang_file;
  421. }
  422. // overwrite the parent language translations if there is a child
  423. if (file_exists($lang_file)) {
  424. include $lang_file;
  425. }
  426. }
  427. } else {
  428. // if the sub-languages feature is not on, then just load the
  429. // set language interface
  430. foreach ($language_files as $index => $language_file) {
  431. // include English
  432. include $langpath.'english/'.$language_file.'.inc.php';
  433. // prepare string for current language
  434. $langfile = $langpath.$language_interface.'/'.$language_file.'.inc.php';
  435. if (file_exists($langfile)) {
  436. include $langfile;
  437. }
  438. }
  439. }
  440. }
  441. // The global variable $charset has been defined in a language file too (trad4all.inc.php), this is legacy situation.
  442. // So, we have to reassign this variable again in order to keep its value right.
  443. $charset = $charset_initial_value;
  444. // The global variable $text_dir has been defined in the language file trad4all.inc.php.
  445. // For determing text direction correspondent to the current language we use now information from the internationalization library.
  446. $text_dir = api_get_text_direction();
  447. //Update of the logout_date field in the table track_e_login (needed for the calculation of the total connection time)
  448. if (!isset($_SESSION['login_as']) && isset($_user)) {
  449. // if $_SESSION['login_as'] is set, then the user is an admin logged as the user
  450. $tbl_track_login = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
  451. $sql_last_connection = "SELECT login_id, login_date FROM $tbl_track_login WHERE login_user_id='".$_user["user_id"]."' ORDER BY login_date DESC LIMIT 0,1";
  452. $q_last_connection = Database::query($sql_last_connection);
  453. if (Database::num_rows($q_last_connection) > 0) {
  454. $i_id_last_connection = Database::result($q_last_connection, 0, 'login_id');
  455. // is the latest logout_date still relevant?
  456. $sql_logout_date = "SELECT logout_date FROM $tbl_track_login WHERE login_id=$i_id_last_connection";
  457. $q_logout_date = Database::query($sql_logout_date);
  458. $res_logout_date = convert_mysql_date(Database::result($q_logout_date,0,'logout_date'));
  459. if ($res_logout_date < time() - $_configuration['session_lifetime']) {
  460. // it isn't, we should create a fresh entry
  461. event_login();
  462. // now that it's created, we can get its ID and carry on
  463. $q_last_connection = Database::query($sql_last_connection);
  464. $i_id_last_connection = Database::result($q_last_connection, 0, 'login_id');
  465. }
  466. $s_sql_update_logout_date = "UPDATE $tbl_track_login SET logout_date=NOW() WHERE login_id='$i_id_last_connection'";
  467. Database::query($s_sql_update_logout_date);
  468. }
  469. }