global.inc.php 19 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538
  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 $lib_path.'events.lib.inc.php';
  83. /* DATABASE CONNECTION */
  84. // @todo: this shouldn't be done here. It should be stored correctly during installation.
  85. if (empty($_configuration['statistics_database']) && $already_installed) {
  86. $_configuration['statistics_database'] = $_configuration['main_database'];
  87. }
  88. // Connect to the server database and select the main chamilo database.
  89. if (!($dokeos_database_connection = @Database::connect(
  90. array(
  91. 'server' => $_configuration['db_host'],
  92. 'username' => $_configuration['db_user'],
  93. 'password' => $_configuration['db_password'],
  94. 'persistent' => $_configuration['db_persistent_connection'] // When $_configuration['db_persistent_connection'] is set, it is expected to be a boolean type.
  95. )))) {
  96. $global_error_code = 3;
  97. // The database server is not available or credentials are invalid.
  98. require $includePath.'/global_error_message.inc.php';
  99. die();
  100. }
  101. if (!$_configuration['db_host']) {
  102. $global_error_code = 4;
  103. // A configuration option about database server is missing.
  104. require $includePath.'/global_error_message.inc.php';
  105. die();
  106. }
  107. /* RETRIEVING ALL THE CHAMILO CONFIG SETTINGS FOR MULTIPLE URLs FEATURE*/
  108. if (!empty($_configuration['multiple_access_urls'])) {
  109. $_configuration['access_url'] = 1;
  110. $access_urls = api_get_access_urls();
  111. $protocol = ((!empty($_SERVER['HTTPS']) && strtoupper($_SERVER['HTTPS']) != 'OFF') ? 'https' : 'http').'://';
  112. $request_url1 = $protocol.$_SERVER['SERVER_NAME'].'/';
  113. $request_url2 = $protocol.$_SERVER['HTTP_HOST'].'/';
  114. foreach ($access_urls as & $details) {
  115. if ($request_url1 == $details['url'] or $request_url2 == $details['url']) {
  116. $_configuration['access_url'] = $details['id'];
  117. }
  118. }
  119. } else {
  120. $_configuration['access_url'] = 1;
  121. }
  122. // This function is moved here after the database connections was made since api_session_start will call the api_get_path() function and this function will call a Database function
  123. // Start session.
  124. api_session_start($already_installed);
  125. // The system has not been designed to use special SQL modes that were introduced since MySQL 5.
  126. Database::query("set session sql_mode='';");
  127. if (!Database::select_db($_configuration['main_database'], $dokeos_database_connection)) {
  128. $global_error_code = 5;
  129. // Connection to the main Chamilo database is impossible, it might be missing or restricted or its configuration option might be incorrect.
  130. require $includePath.'/global_error_message.inc.php';
  131. die();
  132. }
  133. /* Initialization of the default encodings */
  134. // The platform's character set must be retrieved at this early moment.
  135. $sql = "SELECT selected_value FROM settings_current WHERE variable = 'platform_charset';";
  136. $result = Database::query($sql);
  137. while ($row = @Database::fetch_array($result)) {
  138. $charset = $row[0];
  139. }
  140. if (empty($charset)) {
  141. $charset = 'UTF-8';
  142. }
  143. // Preserving the value of the global variable $charset.
  144. $charset_initial_value = $charset;
  145. // Initialization of the internationalization library.
  146. api_initialize_internationalization();
  147. // Initialization of the default encoding that will be used by the multibyte string routines in the internationalization library.
  148. api_set_internationalization_default_encoding($charset);
  149. // Initialization of the database encoding to be used.
  150. Database::query("SET SESSION character_set_server='utf8';");
  151. Database::query("SET SESSION collation_server='utf8_general_ci';");
  152. Database::query("SET CHARACTER SET '" . Database::to_db_encoding($charset) . "';");
  153. // access_url == 1 is the default chamilo location
  154. if ($_configuration['access_url'] != 1) {
  155. $url_info = api_get_access_url($_configuration['access_url']);
  156. if ($url_info['active'] == 1) {
  157. $settings_by_access = & api_get_settings(null, 'list', $_configuration['access_url'], 1);
  158. foreach ($settings_by_access as & $row) {
  159. if (empty($row['variable'])) {
  160. $row['variable'] = 0;
  161. }
  162. if (empty($row['subkey'])) {
  163. $row['subkey'] = 0;
  164. }
  165. if (empty($row['category'])) {
  166. $row['category'] = 0;
  167. }
  168. $settings_by_access_list[$row['variable']][$row['subkey']][$row['category']] = $row;
  169. }
  170. }
  171. }
  172. $result = & api_get_settings(null, 'list', 1);
  173. foreach ($result as & $row) {
  174. if ($_configuration['access_url'] != 1) {
  175. if ($url_info['active'] == 1) {
  176. $var = empty($row['variable']) ? 0 : $row['variable'];
  177. $subkey = empty($row['subkey']) ? 0 : $row['subkey'];
  178. $category = empty($row['category']) ? 0 : $row['category'];
  179. }
  180. if ($row['access_url_changeable'] == 1 && $url_info['active'] == 1) {
  181. if ($settings_by_access_list[$var][$subkey][$category]['selected_value'] != '') {
  182. if ($row['subkey'] == null) {
  183. $_setting[$row['variable']] = $settings_by_access_list[$var][$subkey][$category]['selected_value'];
  184. } else {
  185. $_setting[$row['variable']][$row['subkey']] = $settings_by_access_list[$var][$subkey][$category]['selected_value'];
  186. }
  187. } else {
  188. if ($row['subkey'] == null) {
  189. $_setting[$row['variable']] = $row['selected_value'];
  190. } else {
  191. $_setting[$row['variable']][$row['subkey']] = $row['selected_value'];
  192. }
  193. }
  194. } else {
  195. if ($row['subkey'] == null) {
  196. $_setting[$row['variable']] = $row['selected_value'];
  197. } else {
  198. $_setting[$row['variable']][$row['subkey']] = $row['selected_value'];
  199. }
  200. }
  201. } else {
  202. if ($row['subkey'] == null) {
  203. $_setting[$row['variable']] = $row['selected_value'];
  204. } else {
  205. $_setting[$row['variable']][$row['subkey']] = $row['selected_value'];
  206. }
  207. }
  208. }
  209. $result = & api_get_settings('Plugins', 'list', $_configuration['access_url']);
  210. $_plugins = array();
  211. foreach ($result as & $row) {
  212. $key = & $row['variable'];
  213. if (is_string($_setting[$key])) {
  214. $_setting[$key] = array();
  215. }
  216. $_setting[$key][] = $row['selected_value'];
  217. $_plugins[$key][] = $row['selected_value'];
  218. }
  219. //load array Kses for Htmlpurifier
  220. require_once $lib_path.'formvalidator/Rule/allowed_tags.inc.php';
  221. //load htmpurifier
  222. require_once $lib_path.'htmlpurifier/library/HTMLPurifier.auto.php';
  223. // include the local (contextual) parameters of this course or section
  224. require $includePath.'/local.inc.php';
  225. // ===== "who is logged in?" module section =====
  226. require_once $lib_path.'online.inc.php';
  227. // check and modify the date of user in the track.e.online table
  228. if (!$x = strpos($_SERVER['PHP_SELF'], 'whoisonline.php')) {
  229. LoginCheck(isset($_user['user_id']) ? $_user['user_id'] : '', $_configuration['statistics_database']);
  230. }
  231. // ===== end "who is logged in?" module section =====
  232. if (api_get_setting('server_type') == 'test') {
  233. /*
  234. Server type is test
  235. - high error reporting level
  236. - only do addslashes on $_GET and $_POST
  237. */
  238. if (IS_PHP_53) {
  239. error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);
  240. } else {
  241. error_reporting(E_ALL & ~E_NOTICE);
  242. }
  243. //error_reporting(E_ALL);
  244. //Addslashes to all $_GET variables
  245. foreach ($_GET as $key => $val) {
  246. if (!ini_get('magic_quotes_gpc')) {
  247. if (is_string($val)) {
  248. $_GET[$key] = addslashes($val);
  249. }
  250. }
  251. }
  252. //Addslashes to all $_POST variables
  253. foreach ($_POST as $key => $val) {
  254. if (!ini_get('magic_quotes_gpc')) {
  255. if (is_string($val)) {
  256. $_POST[$key] = addslashes($val);
  257. }
  258. }
  259. }
  260. } else {
  261. /*
  262. Server type is not test
  263. - normal error reporting level
  264. - full fake register globals block
  265. */
  266. error_reporting(E_COMPILE_ERROR | E_ERROR | E_CORE_ERROR);
  267. // TODO: These obsolete variables $HTTP_* to be check whether they are actually used.
  268. if (!isset($HTTP_GET_VARS)) { $HTTP_GET_VARS = $_GET; }
  269. if (!isset($HTTP_POST_VARS)) { $HTTP_POST_VARS = $_POST; }
  270. if (!isset($HTTP_POST_FILES)) { $HTTP_POST_FILES = $_FILES; }
  271. if (!isset($HTTP_SESSION_VARS)) { $HTTP_SESSION_VARS = $_SESSION; }
  272. if (!isset($HTTP_SERVER_VARS)) { $HTTP_SERVER_VARS = $_SERVER; }
  273. // Register SESSION variables into $GLOBALS
  274. if (sizeof($HTTP_SESSION_VARS)) {
  275. if (!is_array($_SESSION)) {
  276. $_SESSION = array();
  277. }
  278. foreach ($HTTP_SESSION_VARS as $key => $val) {
  279. $_SESSION[$key] = $HTTP_SESSION_VARS[$key];
  280. $GLOBALS[$key] = $HTTP_SESSION_VARS[$key];
  281. }
  282. }
  283. // Register SERVER variables into $GLOBALS
  284. if (sizeof($HTTP_SERVER_VARS)) {
  285. $_SERVER = array();
  286. foreach ($HTTP_SERVER_VARS as $key => $val) {
  287. $_SERVER[$key] = $HTTP_SERVER_VARS[$key];
  288. 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') {
  289. $GLOBALS[$key]=$HTTP_SERVER_VARS[$key];
  290. }
  291. }
  292. }
  293. }
  294. /* LOAD LANGUAGE FILES SECTION */
  295. // if we use the javascript version (without go button) we receive a get
  296. // if we use the non-javascript version (with the go button) we receive a post
  297. $user_language = '';
  298. if (!empty($_GET['language'])) {
  299. $user_language = $_GET['language'];
  300. }
  301. if (!empty($_POST['language_list'])) {
  302. $user_language = str_replace('index.php?language=', '', $_POST['language_list']);
  303. }
  304. // Include all files (first english and then current interface language)
  305. $langpath = api_get_path(SYS_LANG_PATH);
  306. /* This will only work if we are in the page to edit a sub_language */
  307. 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') {
  308. require_once '../admin/sub_language.class.php';
  309. // getting the arrays of files i.e notification, trad4all, etc
  310. $language_files_to_load = SubLanguageManager::get_all_data_of_dokeos_folder(api_get_path(SYS_LANG_PATH).'english', true);
  311. //getting parent info
  312. $parent_language = SubLanguageManager::get_all_information_of_language(intval($_REQUEST['id']));
  313. //getting sub language info
  314. $sub_language = SubLanguageManager::get_all_information_of_language(intval($_REQUEST['sub_language_id']));
  315. $english_language_array = $parent_language_array = $sub_language_array = array();
  316. foreach ($language_files_to_load as $language_file_item) {
  317. $lang_list_pre = array_keys($GLOBALS);
  318. include $langpath.'english/'.$language_file_item.'.inc.php'; //loading english
  319. $lang_list_post = array_keys($GLOBALS);
  320. $lang_list_result = array_diff($lang_list_post, $lang_list_pre);
  321. unset($lang_list_pre);
  322. // english language array
  323. $english_language_array[$language_file_item] = compact($lang_list_result);
  324. //cleaning the variables
  325. foreach($lang_list_result as $item) {
  326. unset(${$item});
  327. }
  328. $parent_file = $langpath.$parent_language['dokeos_folder'].'/'.$language_file_item.'.inc.php';
  329. if (is_file($parent_file)) {
  330. include_once $parent_file;
  331. }
  332. // parent language array
  333. $parent_language_array[$language_file_item] = compact($lang_list_result);
  334. //cleaning the variables
  335. foreach($lang_list_result as $item) {
  336. unset(${$item});
  337. }
  338. $sub_file = $langpath.$sub_language['dokeos_folder'].'/'.$language_file_item.'.inc.php';
  339. if (is_file($sub_file)) {
  340. include $sub_file;
  341. }
  342. // sub language array
  343. $sub_language_array[$language_file_item] = compact($lang_list_result);
  344. //cleaning the variables
  345. foreach($lang_list_result as $item) {
  346. unset(${$item});
  347. }
  348. }
  349. }
  350. // Checking if we have a valid language. If not we set it to the platform language.
  351. $valid_languages = api_get_languages();
  352. if (!empty($valid_languages)) {
  353. if (!in_array($user_language, $valid_languages['folder'])) {
  354. $user_language = api_get_setting('platformLanguage');
  355. }
  356. if (in_array($user_language, $valid_languages['folder']) && (isset($_GET['language']) || isset($_POST['language_list']))) {
  357. $user_selected_language = $user_language; // $_GET['language'];
  358. $_SESSION['user_language_choice'] = $user_selected_language;
  359. $platformLanguage = $user_selected_language;
  360. } else {
  361. $platformLanguage = api_get_setting('platformLanguage');
  362. }
  363. if (isset($_SESSION['user_language_choice'])) {
  364. $language_interface = $_SESSION['user_language_choice'];
  365. } else {
  366. $language_interface = api_get_setting('platformLanguage');
  367. }
  368. if (isset($_user['language'])) {
  369. $language_interface = $_user['language'];
  370. }
  371. if ($_course['language']) {
  372. $language_interface = $_course['language'];
  373. }
  374. }
  375. // Sometimes the variable $language_interface is changed
  376. // temporarily for achieving translation in different language.
  377. // We need to save the genuine value of this variable and
  378. // to use it within the function get_lang(...).
  379. $language_interface_initial_value = $language_interface;
  380. /*
  381. * Include all necessary language files
  382. * - trad4all
  383. * - notification
  384. * - custom tool language files
  385. */
  386. $language_files = array();
  387. $language_files[] = 'trad4all';
  388. $language_files[] = 'notification';
  389. $language_files[] = 'accessibility';
  390. if (isset($language_file)) {
  391. if (!is_array($language_file)) {
  392. $language_files[] = $language_file;
  393. } else {
  394. $language_files = array_merge($language_files, $language_file);
  395. }
  396. }
  397. if (is_array($language_files)) {
  398. if (api_get_setting('allow_use_sub_language') == 'true') {
  399. foreach ($language_files as $index => $language_file) {
  400. include $langpath.'english/'.$language_file.'.inc.php';
  401. $langfile = $langpath.$language_interface.'/'.$language_file.'.inc.php';
  402. $tbl_admin_languages = Database :: get_main_table(TABLE_MAIN_LANGUAGE);
  403. $sql_sub_language = 'SELECT dokeos_folder FROM '.$tbl_admin_languages.' WHERE parent_id=(SELECT id FROM '.$tbl_admin_languages.' WHERE dokeos_folder="'.Database::escape_string($language_interface).'" AND ISNULL(parent_id))';
  404. $rs_sub_language = Database::query($sql_sub_language);
  405. $num_row_sub_language = Database::num_rows($rs_sub_language);
  406. if (file_exists($langfile)) {
  407. include $langfile;
  408. for ($i = 0; $i < $num_row_sub_language; $i++) {
  409. $row_sub_language = Database::result($rs_sub_language, $i, 'dokeos_folder');
  410. $sub_langfile = $langpath.$row_sub_language.'/'.$language_file.'.inc.php';
  411. if (file_exists($sub_langfile)) {
  412. include $sub_langfile;
  413. }
  414. }
  415. }
  416. }
  417. } else {
  418. foreach ($language_files as $index => $language_file) {
  419. include $langpath.'english/'.$language_file.'.inc.php';
  420. $langfile = $langpath.$language_interface.'/'.$language_file.'.inc.php';
  421. if (file_exists($langfile)) {
  422. include $langfile;
  423. }
  424. }
  425. }
  426. }
  427. // The global variable $charset has been defined in a language file too (trad4all.inc.php), this is legacy situation.
  428. // So, we have to reassign this variable again in order to keep its value right.
  429. $charset = $charset_initial_value;
  430. // The global variable $text_dir has been defined in the language file trad4all.inc.php.
  431. // For determing text direction correspondent to the current language we use now information from the internationalization library.
  432. $text_dir = api_get_text_direction();
  433. //Update of the logout_date field in the table track_e_login (needed for the calculation of the total connection time)
  434. if ($_configuration['tracking_enabled'] && !isset($_SESSION['login_as']) && isset($_user)) {
  435. // if $_SESSION['login_as'] is set, then the user is an admin logged as the user
  436. $tbl_track_login = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
  437. $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";
  438. $q_last_connection = Database::query($sql_last_connection);
  439. if (Database::num_rows($q_last_connection) > 0) {
  440. $i_id_last_connection = Database::result($q_last_connection, 0, 'login_id');
  441. // is the latest logout_date still relevant?
  442. $sql_logout_date = "SELECT logout_date FROM $tbl_track_login WHERE login_id=$i_id_last_connection";
  443. $q_logout_date = Database::query($sql_logout_date);
  444. $res_logout_date = convert_mysql_date(Database::result($q_logout_date,0,'logout_date'));
  445. if ($res_logout_date < time() - $_configuration['session_lifetime']) {
  446. // it isn't, we should create a fresh entry
  447. event_login();
  448. // now that it's created, we can get its ID and carry on
  449. $q_last_connection = Database::query($sql_last_connection);
  450. $i_id_last_connection = Database::result($q_last_connection, 0, 'login_id');
  451. }
  452. $s_sql_update_logout_date = "UPDATE $tbl_track_login SET logout_date=NOW() WHERE login_id='$i_id_last_connection'";
  453. Database::query($s_sql_update_logout_date);
  454. }
  455. }