global.inc.php 18 KB

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  1. <?php
  2. /**
  3. ==============================================================================
  4. * It is recommended that ALL dokeos 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 dokeos.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 Dokeos config page.
  20. *
  21. ==============================================================================
  22. */
  23. // Showing/hiding error codes in global error messages.
  24. define('SHOW_ERROR_CODES', false);
  25. // PHP version requirement.
  26. define('REQUIRED_PHP_VERSION', '5');
  27. // Determine the directory path where this current file lies.
  28. // This path will be useful to include the other intialisation files.
  29. $includePath = dirname(__FILE__);
  30. // PHP version check.
  31. if (!function_exists('version_compare') || version_compare(phpversion(), REQUIRED_PHP_VERSION, '<')) {
  32. $global_error_code = 1;
  33. // Incorrect PHP version.
  34. require $includePath.'/global_error_message.inc.php';
  35. die();
  36. }
  37. // @todo Isn't this file renamed to configuration.inc.php yet?
  38. // Include the main Dokeos platform configuration file.
  39. $main_configuration_file_path = $includePath.'/conf/configuration.php';
  40. $already_installed = false;
  41. if (file_exists($main_configuration_file_path)) {
  42. require_once $main_configuration_file_path;
  43. $already_installed = true;
  44. } else {
  45. $_configuration = array();
  46. }
  47. // Ensure that _configuration is in the global scope before loading
  48. // main_api.lib.php. This is particularly helpful for unit tests
  49. if (!isset($GLOBALS['_configuration'])) {
  50. $GLOBALS['_configuration'] = $_configuration;
  51. }
  52. // Include the main Dokeos platform library file.
  53. require_once $includePath.'/lib/main_api.lib.php';
  54. // Do not over-use this variable. It is only for this script's local use.
  55. $lib_path = api_get_path(LIBRARY_PATH);
  56. // Start session.
  57. api_session_start($already_installed);
  58. if (!$already_installed) {
  59. $global_error_code = 2;
  60. // The system has not been installed yet.
  61. require $includePath.'/global_error_message.inc.php';
  62. die();
  63. }
  64. // Fix bug in IIS that doesn't fill the $_SERVER['REQUEST_URI'].
  65. api_request_uri();
  66. // Add the path to the pear packages to the include path
  67. ini_set('include_path', api_create_include_path_setting());
  68. // This is for compatibility with MAC computers.
  69. ini_set('auto_detect_line_endings', '1');
  70. // Include the libraries that are necessary everywhere
  71. require_once $lib_path.'database.lib.php';
  72. require_once $lib_path.'display.lib.php';
  73. require_once $lib_path.'text.lib.php';
  74. require_once $lib_path.'security.lib.php';
  75. require_once $lib_path.'events.lib.inc.php';
  76. // @todo: this shouldn't be done here. It should be stored correctly during installation.
  77. if (empty($_configuration['statistics_database']) && $already_installed) {
  78. $_configuration['statistics_database'] = $_configuration['main_database'];
  79. }
  80. // Connect to the server database and select the main dokeos database.
  81. if (!($dokeos_database_connection = @mysql_connect($_configuration['db_host'], $_configuration['db_user'], $_configuration['db_password']))) {
  82. $global_error_code = 3;
  83. // The database server is not available or credentials are invalid.
  84. require $includePath.'/global_error_message.inc.php';
  85. die();
  86. }
  87. if (!$_configuration['db_host']) {
  88. $global_error_code = 4;
  89. // A configuration option about database server is missing.
  90. require $includePath.'/global_error_message.inc.php';
  91. die();
  92. }
  93. // The system has not been designed to use special SQL modes that were introduced since MySQL 5.
  94. Database::query("set session sql_mode='';", __FILE__, __LINE__);
  95. if (!mysql_select_db($_configuration['main_database'], $dokeos_database_connection)) {
  96. $global_error_code = 5;
  97. // Connection to the main Dokeos database is impossible, it might be missing or restricted or its configuration option might be incorrect.
  98. require $includePath.'/global_error_message.inc.php';
  99. die();
  100. }
  101. /*
  102. --------------------------------------------
  103. Initialization of the default encodings
  104. --------------------------------------------
  105. */
  106. // The platform's character set must be retrieved at this early moment.
  107. $sql = "SELECT selected_value FROM settings_current WHERE variable = 'platform_charset';";
  108. $result = Database::query($sql, __FILE__, __LINE__);
  109. while ($row = @Database::fetch_array($result)) {
  110. $charset = $row[0];
  111. }
  112. if (empty($charset)) {
  113. $charset = 'ISO-8859-15';
  114. }
  115. // Preserving the value of the global variable $charset.
  116. $charset_initial_value = $charset;
  117. // Initialization of the internationalization library.
  118. api_initialize_internationalization();
  119. // Initialization of the default encoding that will be used by the multibyte string routines in the internationalization library.
  120. api_set_internationalization_default_encoding($charset);
  121. // Initialization of the database encoding to be used.
  122. Database::query("SET SESSION character_set_server='utf8';");
  123. Database::query("SET SESSION collation_server='utf8_general_ci';");
  124. Database::query("SET CHARACTER SET '" . Database::to_db_encoding($charset) . "';");
  125. /*
  126. --------------------------------------------
  127. RETRIEVING ALL THE DOKEOS CONFIG SETTINGS
  128. --------------------------------------------
  129. */
  130. if (!empty($_configuration['multiple_access_urls'])) {
  131. $_configuration['access_url'] = 1;
  132. $access_urls = api_get_access_urls();
  133. $protocol = ((!empty($_SERVER['HTTPS']) && strtoupper($_SERVER['HTTPS']) != 'OFF') ? 'https' : 'http').'://';
  134. $request_url1 = $protocol.$_SERVER['SERVER_NAME'].'/';
  135. $request_url2 = $protocol.$_SERVER['HTTP_HOST'].'/';
  136. foreach ($access_urls as $details) {
  137. if ($request_url1 == $details['url'] or $request_url2 == $details['url']) {
  138. $_configuration['access_url'] = $details['id'];
  139. }
  140. }
  141. } else {
  142. $_configuration['access_url'] = 1;
  143. }
  144. // access_url == 1 is the default dokeos location
  145. if ($_configuration['access_url'] != 1) {
  146. $url_info = api_get_access_url($_configuration['access_url']);
  147. if ($url_info['active'] == 1) {
  148. $settings_by_access = api_get_settings(null, 'list', $_configuration['access_url'], 1);
  149. foreach ($settings_by_access as $row) {
  150. if (empty($row['variable'])) {
  151. $row['variable'] = 0;
  152. }
  153. if (empty($row['subkey'])) {
  154. $row['subkey'] = 0;
  155. }
  156. if (empty($row['category'])) {
  157. $row['category'] = 0;
  158. }
  159. $settings_by_access_list[$row['variable']][$row['subkey']][$row['category']] = $row;
  160. }
  161. }
  162. }
  163. $result = api_get_settings(null, 'list', 1);
  164. foreach ($result as $row) {
  165. if ($_configuration['access_url'] != 1) {
  166. if ($url_info['active'] == 1) {
  167. $var = empty($row['variable']) ? 0 : $row['variable'];
  168. $subkey = empty($row['subkey']) ? 0 : $row['subkey'];
  169. $category = empty($row['category']) ? 0 : $row['category'];
  170. }
  171. if ($row['access_url_changeable'] == 1 && $url_info['active'] == 1) {
  172. if ($settings_by_access_list[$var][$subkey][$category]['selected_value'] != '') {
  173. if ($row['subkey'] == null) {
  174. $_setting[$row['variable']]= $settings_by_access_list[$var][$subkey][$category]['selected_value'];
  175. } else {
  176. $_setting[$row['variable']][$row['subkey']] = $settings_by_access_list[$var][$subkey][$category]['selected_value'];
  177. }
  178. } else {
  179. if ($row['subkey'] == null) {
  180. $_setting[$row['variable']] = $row['selected_value'];
  181. } else {
  182. $_setting[$row['variable']][$row['subkey']] = $row['selected_value'];
  183. }
  184. }
  185. } else {
  186. if ($row['subkey'] == null) {
  187. $_setting[$row['variable']] = $row['selected_value'];
  188. } else {
  189. $_setting[$row['variable']][$row['subkey']] = $row['selected_value'];
  190. }
  191. }
  192. } else {
  193. if ($row['subkey'] == null) {
  194. $_setting[$row['variable']] = $row['selected_value'];
  195. } else {
  196. $_setting[$row['variable']][$row['subkey']] = $row['selected_value'];
  197. }
  198. }
  199. }
  200. $result = api_get_settings('Plugins', 'list', $_configuration['access_url']);
  201. $_plugins = array();
  202. foreach ($result as $row) {
  203. $key = $row['variable'];
  204. if (is_string($_setting[$key])) {
  205. $_setting[$key] = array();
  206. }
  207. $_setting[$key][] = $row['selected_value'];
  208. $_plugins[$key][] = $row['selected_value'];
  209. }
  210. //load array Kses for Htmlpurifier
  211. require_once $lib_path.'formvalidator/Rule/allowed_tags.inc.php';
  212. //load htmpurifier
  213. require_once $lib_path.'htmlpurifier/library/HTMLPurifier.auto.php';
  214. // include the local (contextual) parameters of this course or section
  215. require $includePath.'/local.inc.php';
  216. // ===== "who is logged in?" module section =====
  217. require_once $lib_path.'online.inc.php';
  218. // check and modify the date of user in the track.e.online table
  219. if (!$x = strpos($_SERVER['PHP_SELF'], 'whoisonline.php')) {
  220. LoginCheck(isset($_user['user_id']) ? $_user['user_id'] : '', $_configuration['statistics_database']);
  221. }
  222. // ===== end "who is logged in?" module section =====
  223. if (api_get_setting('server_type') == 'test') {
  224. /*
  225. --------------------------------------------
  226. Server type is test
  227. - high error reporting level
  228. - only do addslashes on $_GET and $_POST
  229. --------------------------------------------
  230. */
  231. if (IS_PHP_53) {
  232. error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);
  233. } else {
  234. error_reporting(E_ALL & ~E_NOTICE);
  235. }
  236. //error_reporting(E_ALL);
  237. //Addslashes to all $_GET variables
  238. foreach ($_GET as $key => $val) {
  239. if (!ini_get('magic_quotes_gpc')) {
  240. if (is_string($val)) {
  241. $_GET[$key] = addslashes($val);
  242. }
  243. }
  244. }
  245. //Addslashes to all $_POST variables
  246. foreach ($_POST as $key => $val) {
  247. if (!ini_get('magic_quotes_gpc')) {
  248. if (is_string($val)) {
  249. $_POST[$key] = addslashes($val);
  250. }
  251. }
  252. }
  253. } else {
  254. /*
  255. --------------------------------------------
  256. Server type is not test
  257. - normal error reporting level
  258. - full fake register globals block
  259. --------------------------------------------
  260. */
  261. error_reporting(E_COMPILE_ERROR | E_ERROR | E_CORE_ERROR);
  262. // TODO: These obsolete variables $HTTP_* to be check whether they are actually used.
  263. if (!isset($HTTP_GET_VARS)) { $HTTP_GET_VARS = $_GET; }
  264. if (!isset($HTTP_POST_VARS)) { $HTTP_POST_VARS = $_POST; }
  265. if (!isset($HTTP_POST_FILES)) { $HTTP_POST_FILES = $_FILES; }
  266. if (!isset($HTTP_SESSION_VARS)) { $HTTP_SESSION_VARS = $_SESSION; }
  267. if (!isset($HTTP_SERVER_VARS)) { $HTTP_SERVER_VARS = $_SERVER; }
  268. // Register SESSION variables into $GLOBALS
  269. if (sizeof($HTTP_SESSION_VARS)) {
  270. if (!is_array($_SESSION)) {
  271. $_SESSION = array();
  272. }
  273. foreach ($HTTP_SESSION_VARS as $key => $val) {
  274. $_SESSION[$key] = $HTTP_SESSION_VARS[$key];
  275. $GLOBALS[$key] = $HTTP_SESSION_VARS[$key];
  276. }
  277. }
  278. // Register SERVER variables into $GLOBALS
  279. if (sizeof($HTTP_SERVER_VARS)) {
  280. $_SERVER = array();
  281. foreach ($HTTP_SERVER_VARS as $key => $val) {
  282. $_SERVER[$key] = $HTTP_SERVER_VARS[$key];
  283. 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') {
  284. $GLOBALS[$key]=$HTTP_SERVER_VARS[$key];
  285. }
  286. }
  287. }
  288. }
  289. /*
  290. -----------------------------------------------------------
  291. LOAD LANGUAGE FILES SECTION
  292. -----------------------------------------------------------
  293. */
  294. // if we use the javascript version (without go button) we receive a get
  295. // if we use the non-javascript version (with the go button) we receive a post
  296. $user_language = '';
  297. if (!empty($_GET['language'])) {
  298. $user_language = $_GET['language'];
  299. }
  300. if (!empty($_POST['language_list'])) {
  301. $user_language = str_replace('index.php?language=', '', $_POST['language_list']);
  302. }
  303. // Include all files (first english and then current interface language)
  304. $langpath = api_get_path(SYS_CODE_PATH).'lang/';
  305. /* This will only work if we are in the page to edit a sub_language */
  306. 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') {
  307. require_once '../admin/sub_language.class.php';
  308. // getting the arrays of files i.e notification, trad4all, etc
  309. $language_files_to_load = SubLanguageManager::get_all_data_of_dokeos_folder(api_get_path(SYS_LANG_PATH).'english', true);
  310. //getting parent info
  311. $parent_language = SubLanguageManager::get_all_information_of_language(intval($_REQUEST['id']));
  312. //getting sub language info
  313. $sub_language = SubLanguageManager::get_all_information_of_language(intval($_REQUEST['sub_language_id']));
  314. $english_language_array = $parent_language_array = $sub_language_array = array();
  315. foreach ($language_files_to_load as $language_file_item) {
  316. $lang_list_pre = array_keys($GLOBALS);
  317. include $langpath.'english/'.$language_file_item.'.inc.php'; //loading english
  318. $lang_list_post = array_keys($GLOBALS);
  319. $lang_list_result = array_diff($lang_list_post, $lang_list_pre);
  320. unset($lang_list_pre);
  321. // ------ english language array
  322. $english_language_array[$language_file_item] = compact($lang_list_result);
  323. //cleaning the variables
  324. foreach($lang_list_result as $item) {
  325. unset(${$item});
  326. }
  327. $parent_file = $langpath.$parent_language['dokeos_folder'].'/'.$language_file_item.'.inc.php';
  328. if (is_file($parent_file)) {
  329. include_once $parent_file;
  330. }
  331. // ------ parent language array
  332. $parent_language_array[$language_file_item] = compact($lang_list_result);
  333. //cleaning the variables
  334. foreach($lang_list_result as $item) {
  335. unset(${$item});
  336. }
  337. $sub_file = $langpath.$sub_language['dokeos_folder'].'/'.$language_file_item.'.inc.php';
  338. if (is_file($sub_file)) {
  339. include $sub_file;
  340. }
  341. // ------ sub language array
  342. $sub_language_array[$language_file_item] = compact($lang_list_result);
  343. //cleaning the variables
  344. foreach($lang_list_result as $item) {
  345. unset(${$item});
  346. }
  347. }
  348. }
  349. // Checking if we have a valid language. If not we set it to the platform language.
  350. $valid_languages = api_get_languages();
  351. if(!empty($valid_languages)) {
  352. if (!in_array($user_language, $valid_languages['folder'])) {
  353. $user_language = api_get_setting('platformLanguage');
  354. }
  355. if (in_array($user_language, $valid_languages['folder']) && (isset($_GET['language']) || isset($_POST['language_list']))) {
  356. $user_selected_language = $user_language; // $_GET['language'];
  357. $_SESSION['user_language_choice'] = $user_selected_language;
  358. $platformLanguage = $user_selected_language;
  359. } else {
  360. $platformLanguage = api_get_setting('platformLanguage');
  361. }
  362. if (isset($_SESSION['user_language_choice'])) {
  363. $language_interface = $_SESSION['user_language_choice'];
  364. } else {
  365. $language_interface = api_get_setting('platformLanguage');
  366. }
  367. if (isset($_user['language'])) {
  368. $language_interface = $_user['language'];
  369. }
  370. if ($_course['language']) {
  371. $language_interface = $_course['language'];
  372. }
  373. }
  374. // Sometimes the variable $language_interface is changed
  375. // temporarily for achieving translation in different language.
  376. // We need to save the genuine value of this variable and
  377. // to use it within the function get_lang(...).
  378. $language_interface_initial_value = $language_interface;
  379. /*
  380. * Include all necessary language files
  381. * - trad4all
  382. * - notification
  383. * - custom tool language files
  384. */
  385. $language_files = array();
  386. $language_files[] = 'trad4all';
  387. $language_files[] = 'notification';
  388. $language_files[] = 'accessibility';
  389. if (isset($language_file)) {
  390. if (!is_array($language_file)) {
  391. $language_files[] = $language_file;
  392. } else {
  393. $language_files = array_merge($language_files, $language_file);
  394. }
  395. }
  396. if (is_array($language_files)) {
  397. if (api_get_setting('allow_use_sub_language') == 'true') {
  398. foreach ($language_files as $index => $language_file) {
  399. include $langpath.'english/'.$language_file.'.inc.php';
  400. $langfile = $langpath.$language_interface.'/'.$language_file.'.inc.php';
  401. $tbl_admin_languages = Database :: get_main_table(TABLE_MAIN_LANGUAGE);
  402. $sql_sub_language = 'SELECT dokeos_folder FROM '.$tbl_admin_languages.' WHERE parent_id=(SELECT id FROM '.$tbl_admin_languages.' WHERE dokeos_folder="'.Database::escape_string($language_interface).'" AND ISNULL(parent_id))';
  403. $rs_sub_language = Database::query($sql_sub_language,__FILE__,__LINE__);
  404. $num_row_sub_language = Database::num_rows($rs_sub_language);
  405. if (file_exists($langfile)) {
  406. include $langfile;
  407. for ($i = 0; $i < $num_row_sub_language; $i++) {
  408. $row_sub_language = Database::result($rs_sub_language, $i, 'dokeos_folder');
  409. $sub_langfile = $langpath.$row_sub_language.'/'.$language_file.'.inc.php';
  410. if (file_exists($sub_langfile)) {
  411. include $sub_langfile;
  412. }
  413. }
  414. }
  415. }
  416. } else {
  417. foreach ($language_files as $index => $language_file) {
  418. include $langpath.'english/'.$language_file.'.inc.php';
  419. $langfile = $langpath.$language_interface.'/'.$language_file.'.inc.php';
  420. if (file_exists($langfile)) {
  421. include $langfile;
  422. }
  423. }
  424. }
  425. }
  426. // The global variable $charset has been defined in a language file too (trad4all.inc.php), this is legacy situation.
  427. // So, we have to reassign this variable again in order to keep its value right.
  428. $charset = $charset_initial_value;
  429. // The global variable $text_dir has been defined in the language file trad4all.inc.php.
  430. // For determing text direction correspondent to the current language we use now information from the internationalization library.
  431. $text_dir = api_get_text_direction();
  432. //Update of the logout_date field in the table track_e_login (needed for the calculation of the total connection time)
  433. if ($_configuration['tracking_enabled'] && !isset($_SESSION['login_as']) && isset($_user)) {
  434. // if $_SESSION['login_as'] is set, then the user is an admin logged as the user
  435. $tbl_track_login = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
  436. $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";
  437. $q_last_connection = Database::query($sql_last_connection);
  438. if (Database::num_rows($q_last_connection) > 0) {
  439. $i_id_last_connection = Database::result($q_last_connection, 0, 'login_id');
  440. $s_sql_update_logout_date = "UPDATE $tbl_track_login SET logout_date=NOW() WHERE login_id='$i_id_last_connection'";
  441. Database::query($s_sql_update_logout_date);
  442. }
  443. }