global.inc.php 20 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.'security.lib.php';
  82. require_once $lib_path.'events.lib.inc.php';
  83. require_once $lib_path.'debug.lib.php';
  84. /* DATABASE CONNECTION */
  85. // @todo: this shouldn't be done here. It should be stored correctly during installation.
  86. if (empty($_configuration['statistics_database']) && $already_installed) {
  87. $_configuration['statistics_database'] = $_configuration['main_database'];
  88. }
  89. // Connect to the server database and select the main chamilo database.
  90. if (!($dokeos_database_connection = @Database::connect(
  91. array(
  92. 'server' => $_configuration['db_host'],
  93. 'username' => $_configuration['db_user'],
  94. 'password' => $_configuration['db_password'],
  95. 'persistent' => $_configuration['db_persistent_connection'] // When $_configuration['db_persistent_connection'] is set, it is expected to be a boolean type.
  96. )))) {
  97. $global_error_code = 3;
  98. // The database server is not available or credentials are invalid.
  99. require $includePath.'/global_error_message.inc.php';
  100. die();
  101. }
  102. if (!$_configuration['db_host']) {
  103. $global_error_code = 4;
  104. // A configuration option about database server is missing.
  105. require $includePath.'/global_error_message.inc.php';
  106. die();
  107. }
  108. /* RETRIEVING ALL THE CHAMILO CONFIG SETTINGS FOR MULTIPLE URLs FEATURE*/
  109. if (!empty($_configuration['multiple_access_urls'])) {
  110. $_configuration['access_url'] = 1;
  111. $access_urls = api_get_access_urls();
  112. $protocol = ((!empty($_SERVER['HTTPS']) && strtoupper($_SERVER['HTTPS']) != 'OFF') ? 'https' : 'http').'://';
  113. $request_url1 = $protocol.$_SERVER['SERVER_NAME'].'/';
  114. $request_url2 = $protocol.$_SERVER['HTTP_HOST'].'/';
  115. foreach ($access_urls as & $details) {
  116. if ($request_url1 == $details['url'] or $request_url2 == $details['url']) {
  117. $_configuration['access_url'] = $details['id'];
  118. }
  119. }
  120. } else {
  121. $_configuration['access_url'] = 1;
  122. }
  123. // The system has not been designed to use special SQL modes that were introduced since MySQL 5.
  124. Database::query("set session sql_mode='';");
  125. if (!Database::select_db($_configuration['main_database'], $dokeos_database_connection)) {
  126. $global_error_code = 5;
  127. // Connection to the main Chamilo database is impossible, it might be missing or restricted or its configuration option might be incorrect.
  128. require $includePath.'/global_error_message.inc.php';
  129. die();
  130. }
  131. /* Initialization of the default encodings */
  132. // The platform's character set must be retrieved at this early moment.
  133. $sql = "SELECT selected_value FROM settings_current WHERE variable = 'platform_charset';";
  134. $result = Database::query($sql);
  135. while ($row = @Database::fetch_array($result)) {
  136. $charset = $row[0];
  137. }
  138. if (empty($charset)) {
  139. $charset = 'UTF-8';
  140. }
  141. // Preserving the value of the global variable $charset.
  142. $charset_initial_value = $charset;
  143. // Initialization of the internationalization library.
  144. api_initialize_internationalization();
  145. // Initialization of the default encoding that will be used by the multibyte string routines in the internationalization library.
  146. api_set_internationalization_default_encoding($charset);
  147. // Initialization of the database encoding to be used.
  148. Database::query("SET SESSION character_set_server='utf8';");
  149. Database::query("SET SESSION collation_server='utf8_general_ci';");
  150. if (api_is_utf8($charset)) {
  151. // See Bug #1802: For UTF-8 systems we prefer to use "SET NAMES 'utf8'" statement in order to avoid a bizarre problem with Chinese language.
  152. Database::query("SET NAMES 'utf8';");
  153. } else {
  154. Database::query("SET CHARACTER SET '" . Database::to_db_encoding($charset) . "';");
  155. }
  156. // Start session after the internationalization library has been initialized.
  157. api_session_start($already_installed);
  158. // access_url == 1 is the default chamilo location
  159. if ($_configuration['access_url'] != 1) {
  160. $url_info = api_get_access_url($_configuration['access_url']);
  161. if ($url_info['active'] == 1) {
  162. $settings_by_access = & api_get_settings(null, 'list', $_configuration['access_url'], 1);
  163. foreach ($settings_by_access as & $row) {
  164. if (empty($row['variable'])) {
  165. $row['variable'] = 0;
  166. }
  167. if (empty($row['subkey'])) {
  168. $row['subkey'] = 0;
  169. }
  170. if (empty($row['category'])) {
  171. $row['category'] = 0;
  172. }
  173. $settings_by_access_list[$row['variable']][$row['subkey']][$row['category']] = $row;
  174. }
  175. }
  176. }
  177. $result = & api_get_settings(null, 'list', 1);
  178. foreach ($result as & $row) {
  179. if ($_configuration['access_url'] != 1) {
  180. if ($url_info['active'] == 1) {
  181. $var = empty($row['variable']) ? 0 : $row['variable'];
  182. $subkey = empty($row['subkey']) ? 0 : $row['subkey'];
  183. $category = empty($row['category']) ? 0 : $row['category'];
  184. }
  185. if ($row['access_url_changeable'] == 1 && $url_info['active'] == 1) {
  186. if ($settings_by_access_list[$var][$subkey][$category]['selected_value'] != '') {
  187. if ($row['subkey'] == null) {
  188. $_setting[$row['variable']] = $settings_by_access_list[$var][$subkey][$category]['selected_value'];
  189. } else {
  190. $_setting[$row['variable']][$row['subkey']] = $settings_by_access_list[$var][$subkey][$category]['selected_value'];
  191. }
  192. } else {
  193. if ($row['subkey'] == null) {
  194. $_setting[$row['variable']] = $row['selected_value'];
  195. } else {
  196. $_setting[$row['variable']][$row['subkey']] = $row['selected_value'];
  197. }
  198. }
  199. } else {
  200. if ($row['subkey'] == null) {
  201. $_setting[$row['variable']] = $row['selected_value'];
  202. } else {
  203. $_setting[$row['variable']][$row['subkey']] = $row['selected_value'];
  204. }
  205. }
  206. } else {
  207. if ($row['subkey'] == null) {
  208. $_setting[$row['variable']] = $row['selected_value'];
  209. } else {
  210. $_setting[$row['variable']][$row['subkey']] = $row['selected_value'];
  211. }
  212. }
  213. }
  214. $result = & api_get_settings('Plugins', 'list', $_configuration['access_url']);
  215. $_plugins = array();
  216. foreach ($result as & $row) {
  217. $key = & $row['variable'];
  218. if (is_string($_setting[$key])) {
  219. $_setting[$key] = array();
  220. }
  221. $_setting[$key][] = $row['selected_value'];
  222. $_plugins[$key][] = $row['selected_value'];
  223. }
  224. //load array Kses for Htmlpurifier
  225. require_once $lib_path.'formvalidator/Rule/allowed_tags.inc.php';
  226. //load htmpurifier
  227. require_once $lib_path.'htmlpurifier/library/HTMLPurifier.auto.php';
  228. // include the local (contextual) parameters of this course or section
  229. require $includePath.'/local.inc.php';
  230. // ===== "who is logged in?" module section =====
  231. require_once $lib_path.'online.inc.php';
  232. // check and modify the date of user in the track.e.online table
  233. if (!$x = strpos($_SERVER['PHP_SELF'], 'whoisonline.php')) {
  234. LoginCheck(isset($_user['user_id']) ? $_user['user_id'] : '', $_configuration['statistics_database']);
  235. }
  236. // ===== end "who is logged in?" module section =====
  237. if (api_get_setting('server_type') == 'test') {
  238. /*
  239. Server type is test
  240. - high error reporting level
  241. - only do addslashes on $_GET and $_POST
  242. */
  243. if (IS_PHP_53) {
  244. error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);
  245. } else {
  246. error_reporting(E_ALL & ~E_NOTICE);
  247. }
  248. //error_reporting(E_ALL);
  249. //Addslashes to all $_GET variables
  250. foreach ($_GET as $key => $val) {
  251. if (!ini_get('magic_quotes_gpc')) {
  252. if (is_string($val)) {
  253. $_GET[$key] = addslashes($val);
  254. }
  255. }
  256. }
  257. //Addslashes to all $_POST variables
  258. foreach ($_POST as $key => $val) {
  259. if (!ini_get('magic_quotes_gpc')) {
  260. if (is_string($val)) {
  261. $_POST[$key] = addslashes($val);
  262. }
  263. }
  264. }
  265. } else {
  266. /*
  267. Server type is not test
  268. - normal error reporting level
  269. - full fake register globals block
  270. */
  271. error_reporting(E_COMPILE_ERROR | E_ERROR | E_CORE_ERROR);
  272. // TODO: These obsolete variables $HTTP_* to be check whether they are actually used.
  273. if (!isset($HTTP_GET_VARS)) { $HTTP_GET_VARS = $_GET; }
  274. if (!isset($HTTP_POST_VARS)) { $HTTP_POST_VARS = $_POST; }
  275. if (!isset($HTTP_POST_FILES)) { $HTTP_POST_FILES = $_FILES; }
  276. if (!isset($HTTP_SESSION_VARS)) { $HTTP_SESSION_VARS = $_SESSION; }
  277. if (!isset($HTTP_SERVER_VARS)) { $HTTP_SERVER_VARS = $_SERVER; }
  278. // Register SESSION variables into $GLOBALS
  279. if (sizeof($HTTP_SESSION_VARS)) {
  280. if (!is_array($_SESSION)) {
  281. $_SESSION = array();
  282. }
  283. foreach ($HTTP_SESSION_VARS as $key => $val) {
  284. $_SESSION[$key] = $HTTP_SESSION_VARS[$key];
  285. $GLOBALS[$key] = $HTTP_SESSION_VARS[$key];
  286. }
  287. }
  288. // Register SERVER variables into $GLOBALS
  289. if (sizeof($HTTP_SERVER_VARS)) {
  290. $_SERVER = array();
  291. foreach ($HTTP_SERVER_VARS as $key => $val) {
  292. $_SERVER[$key] = $HTTP_SERVER_VARS[$key];
  293. 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') {
  294. $GLOBALS[$key]=$HTTP_SERVER_VARS[$key];
  295. }
  296. }
  297. }
  298. }
  299. /* LOAD LANGUAGE FILES SECTION */
  300. // if we use the javascript version (without go button) we receive a get
  301. // if we use the non-javascript version (with the go button) we receive a post
  302. $user_language = '';
  303. if (!empty($_GET['language'])) {
  304. $user_language = $_GET['language'];
  305. }
  306. if (!empty($_POST['language_list'])) {
  307. $user_language = str_replace('index.php?language=', '', $_POST['language_list']);
  308. }
  309. // Include all files (first english and then current interface language)
  310. $langpath = api_get_path(SYS_LANG_PATH);
  311. /* This will only work if we are in the page to edit a sub_language */
  312. 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') {
  313. require_once '../admin/sub_language.class.php';
  314. // getting the arrays of files i.e notification, trad4all, etc
  315. $language_files_to_load = SubLanguageManager::get_all_data_of_dokeos_folder(api_get_path(SYS_LANG_PATH).'english', true);
  316. //getting parent info
  317. $parent_language = SubLanguageManager::get_all_information_of_language(intval($_REQUEST['id']));
  318. //getting sub language info
  319. $sub_language = SubLanguageManager::get_all_information_of_language(intval($_REQUEST['sub_language_id']));
  320. $english_language_array = $parent_language_array = $sub_language_array = array();
  321. foreach ($language_files_to_load as $language_file_item) {
  322. $lang_list_pre = array_keys($GLOBALS);
  323. include $langpath.'english/'.$language_file_item.'.inc.php'; //loading english
  324. $lang_list_post = array_keys($GLOBALS);
  325. $lang_list_result = array_diff($lang_list_post, $lang_list_pre);
  326. unset($lang_list_pre);
  327. // english language array
  328. $english_language_array[$language_file_item] = compact($lang_list_result);
  329. //cleaning the variables
  330. foreach($lang_list_result as $item) {
  331. unset(${$item});
  332. }
  333. $parent_file = $langpath.$parent_language['dokeos_folder'].'/'.$language_file_item.'.inc.php';
  334. if (is_file($parent_file)) {
  335. include_once $parent_file;
  336. }
  337. // parent language array
  338. $parent_language_array[$language_file_item] = compact($lang_list_result);
  339. //cleaning the variables
  340. foreach($lang_list_result as $item) {
  341. unset(${$item});
  342. }
  343. $sub_file = $langpath.$sub_language['dokeos_folder'].'/'.$language_file_item.'.inc.php';
  344. if (is_file($sub_file)) {
  345. include $sub_file;
  346. }
  347. // sub language array
  348. $sub_language_array[$language_file_item] = compact($lang_list_result);
  349. //cleaning the variables
  350. foreach($lang_list_result as $item) {
  351. unset(${$item});
  352. }
  353. }
  354. }
  355. // Checking if we have a valid language. If not we set it to the platform language.
  356. $valid_languages = api_get_languages();
  357. if (!empty($valid_languages)) {
  358. if (!in_array($user_language, $valid_languages['folder'])) {
  359. $user_language = api_get_setting('platformLanguage');
  360. }
  361. if (in_array($user_language, $valid_languages['folder']) && (isset($_GET['language']) || isset($_POST['language_list']))) {
  362. $user_selected_language = $user_language; // $_GET['language'];
  363. $_SESSION['user_language_choice'] = $user_selected_language;
  364. $platformLanguage = $user_selected_language;
  365. } else {
  366. $platformLanguage = api_get_setting('platformLanguage');
  367. }
  368. if (isset($_SESSION['user_language_choice'])) {
  369. $language_interface = $_SESSION['user_language_choice'];
  370. } else {
  371. $language_interface = api_get_setting('platformLanguage');
  372. }
  373. if (isset($_user['language'])) {
  374. $language_interface = $_user['language'];
  375. }
  376. if ($_course['language']) {
  377. $language_interface = $_course['language'];
  378. }
  379. }
  380. // Sometimes the variable $language_interface is changed
  381. // temporarily for achieving translation in different language.
  382. // We need to save the genuine value of this variable and
  383. // to use it within the function get_lang(...).
  384. $language_interface_initial_value = $language_interface;
  385. /**
  386. * Include all necessary language files
  387. * - trad4all
  388. * - notification
  389. * - custom tool language files
  390. */
  391. $language_files = array();
  392. $language_files[] = 'trad4all';
  393. $language_files[] = 'notification';
  394. $language_files[] = 'accessibility';
  395. if (isset($language_file)) {
  396. if (!is_array($language_file)) {
  397. $language_files[] = $language_file;
  398. } else {
  399. $language_files = array_merge($language_files, $language_file);
  400. }
  401. }
  402. // if a set of language files has been properly defined
  403. if (is_array($language_files)) {
  404. // if the sub-language feature is on
  405. if (api_get_setting('allow_use_sub_language') == 'true') {
  406. require_once api_get_path(SYS_CODE_PATH).'admin/sub_language.class.php';
  407. $parent_path = SubLanguageManager::get_parent_language_path($language_interface);
  408. foreach ($language_files as $index => $language_file) {
  409. // include English
  410. include $langpath.'english/'.$language_file.'.inc.php';
  411. // prepare string for current language and its parent
  412. $lang_file = $langpath.$language_interface.'/'.$language_file.'.inc.php';
  413. $parent_lang_file = $langpath.$parent_path.'/'.$language_file.'.inc.php';
  414. // load the parent language file first
  415. if (file_exists($parent_lang_file)) {
  416. include $parent_lang_file;
  417. }
  418. // overwrite the parent language translations if there is a child
  419. if (file_exists($lang_file)) {
  420. include $lang_file;
  421. }
  422. }
  423. } else {
  424. // if the sub-languages feature is not on, then just load the
  425. // set language interface
  426. foreach ($language_files as $index => $language_file) {
  427. // include English
  428. include $langpath.'english/'.$language_file.'.inc.php';
  429. // prepare string for current language
  430. $langfile = $langpath.$language_interface.'/'.$language_file.'.inc.php';
  431. if (file_exists($langfile)) {
  432. include $langfile;
  433. }
  434. }
  435. }
  436. }
  437. // The global variable $charset has been defined in a language file too (trad4all.inc.php), this is legacy situation.
  438. // So, we have to reassign this variable again in order to keep its value right.
  439. $charset = $charset_initial_value;
  440. // The global variable $text_dir has been defined in the language file trad4all.inc.php.
  441. // For determing text direction correspondent to the current language we use now information from the internationalization library.
  442. $text_dir = api_get_text_direction();
  443. //Update of the logout_date field in the table track_e_login (needed for the calculation of the total connection time)
  444. if ($_configuration['tracking_enabled'] && !isset($_SESSION['login_as']) && isset($_user)) {
  445. // if $_SESSION['login_as'] is set, then the user is an admin logged as the user
  446. $tbl_track_login = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
  447. $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";
  448. $q_last_connection = Database::query($sql_last_connection);
  449. if (Database::num_rows($q_last_connection) > 0) {
  450. $i_id_last_connection = Database::result($q_last_connection, 0, 'login_id');
  451. // is the latest logout_date still relevant?
  452. $sql_logout_date = "SELECT logout_date FROM $tbl_track_login WHERE login_id=$i_id_last_connection";
  453. $q_logout_date = Database::query($sql_logout_date);
  454. $res_logout_date = convert_mysql_date(Database::result($q_logout_date,0,'logout_date'));
  455. if ($res_logout_date < time() - $_configuration['session_lifetime']) {
  456. // it isn't, we should create a fresh entry
  457. event_login();
  458. // now that it's created, we can get its ID and carry on
  459. $q_last_connection = Database::query($sql_last_connection);
  460. $i_id_last_connection = Database::result($q_last_connection, 0, 'login_id');
  461. }
  462. $s_sql_update_logout_date = "UPDATE $tbl_track_login SET logout_date=NOW() WHERE login_id='$i_id_last_connection'";
  463. Database::query($s_sql_update_logout_date);
  464. }
  465. }