Subs-Db-mysql.php 25 KB

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  1. <?php
  2. /**
  3. * This file has all the main functions in it that relate to the database.
  4. *
  5. * Simple Machines Forum (SMF)
  6. *
  7. * @package SMF
  8. * @author Simple Machines http://www.simplemachines.org
  9. * @copyright 2013 Simple Machines and individual contributors
  10. * @license http://www.simplemachines.org/about/smf/license.php BSD
  11. *
  12. * @version 2.1 Alpha 1
  13. */
  14. if (!defined('SMF'))
  15. die('No direct access...');
  16. /**
  17. * Maps the implementations in this file (smf_db_function_name)
  18. * to the $smcFunc['db_function_name'] variable.
  19. *
  20. * @param string $db_server
  21. * @param string $db_name
  22. * @param string $db_user
  23. * @param string $db_passwd
  24. * @param string $db_prefix
  25. * @param array $db_options
  26. * @return null
  27. */
  28. function smf_db_initiate($db_server, $db_name, $db_user, $db_passwd, $db_prefix, $db_options = array())
  29. {
  30. global $smcFunc, $mysql_set_mode;
  31. // Map some database specific functions, only do this once.
  32. if (!isset($smcFunc['db_fetch_assoc']) || $smcFunc['db_fetch_assoc'] != 'mysql_fetch_assoc')
  33. $smcFunc += array(
  34. 'db_query' => 'smf_db_query',
  35. 'db_quote' => 'smf_db_quote',
  36. 'db_fetch_assoc' => 'mysql_fetch_assoc',
  37. 'db_fetch_row' => 'mysql_fetch_row',
  38. 'db_free_result' => 'mysql_free_result',
  39. 'db_insert' => 'smf_db_insert',
  40. 'db_insert_id' => 'smf_db_insert_id',
  41. 'db_num_rows' => 'mysql_num_rows',
  42. 'db_data_seek' => 'mysql_data_seek',
  43. 'db_num_fields' => 'mysql_num_fields',
  44. 'db_escape_string' => 'addslashes',
  45. 'db_unescape_string' => 'stripslashes',
  46. 'db_server_info' => 'mysql_get_server_info',
  47. 'db_affected_rows' => 'smf_db_affected_rows',
  48. 'db_transaction' => 'smf_db_transaction',
  49. 'db_error' => 'mysql_error',
  50. 'db_select_db' => 'mysql_select_db',
  51. 'db_title' => 'MySQL',
  52. 'db_sybase' => false,
  53. 'db_case_sensitive' => false,
  54. 'db_escape_wildcard_string' => 'smf_db_escape_wildcard_string',
  55. );
  56. if (!empty($db_options['persist']))
  57. $connection = @mysql_pconnect($db_server, $db_user, $db_passwd);
  58. else
  59. $connection = @mysql_connect($db_server, $db_user, $db_passwd);
  60. // Something's wrong, show an error if its fatal (which we assume it is)
  61. if (!$connection)
  62. {
  63. if (!empty($db_options['non_fatal']))
  64. return null;
  65. else
  66. display_db_error();
  67. }
  68. // Select the database, unless told not to
  69. if (empty($db_options['dont_select_db']) && !@mysql_select_db($db_name, $connection) && empty($db_options['non_fatal']))
  70. display_db_error();
  71. // This makes it possible to have SMF automatically change the sql_mode and autocommit if needed.
  72. if (isset($mysql_set_mode) && $mysql_set_mode === true)
  73. $smcFunc['db_query']('', 'SET sql_mode = \'\', AUTOCOMMIT = 1',
  74. array(),
  75. false
  76. );
  77. return $connection;
  78. }
  79. /**
  80. * Extend the database functionality. It calls the respective file's init
  81. * to add the implementations in that file to $smcFunc array.
  82. *
  83. * @param string $type indicated which additional file to load. ('extra', 'packages')
  84. */
  85. function db_extend($type = 'extra')
  86. {
  87. global $sourcedir, $db_type;
  88. require_once($sourcedir . '/Db' . strtoupper($type[0]) . substr($type, 1) . '-' . $db_type . '.php');
  89. $initFunc = 'db_' . $type . '_init';
  90. $initFunc();
  91. }
  92. /**
  93. * Fix up the prefix so it doesn't require the database to be selected.
  94. *
  95. * @param string &db_prefix
  96. * @param string $db_name
  97. */
  98. function db_fix_prefix(&$db_prefix, $db_name)
  99. {
  100. $db_prefix = is_numeric(substr($db_prefix, 0, 1)) ? $db_name . '.' . $db_prefix : '`' . $db_name . '`.' . $db_prefix;
  101. }
  102. /**
  103. * Callback for preg_replace_callback on the query.
  104. * It allows to replace on the fly a few pre-defined strings, for convenience ('query_see_board', 'query_wanna_see_board'), with
  105. * their current values from $user_info.
  106. * In addition, it performs checks and sanitization on the values sent to the database.
  107. *
  108. * @param $matches
  109. */
  110. function smf_db_replacement__callback($matches)
  111. {
  112. global $db_callback, $user_info, $db_prefix;
  113. list ($values, $connection) = $db_callback;
  114. // Connection gone??? This should *never* happen at this point, yet it does :'(
  115. if (!is_resource($connection))
  116. display_db_error();
  117. if ($matches[1] === 'db_prefix')
  118. return $db_prefix;
  119. if ($matches[1] === 'query_see_board')
  120. return $user_info['query_see_board'];
  121. if ($matches[1] === 'query_wanna_see_board')
  122. return $user_info['query_wanna_see_board'];
  123. if (!isset($matches[2]))
  124. smf_db_error_backtrace('Invalid value inserted or no type specified.', '', E_USER_ERROR, __FILE__, __LINE__);
  125. if (!isset($values[$matches[2]]))
  126. smf_db_error_backtrace('The database value you\'re trying to insert does not exist: ' . htmlspecialchars($matches[2]), '', E_USER_ERROR, __FILE__, __LINE__);
  127. $replacement = $values[$matches[2]];
  128. switch ($matches[1])
  129. {
  130. case 'int':
  131. if (!is_numeric($replacement) || (string) $replacement !== (string) (int) $replacement)
  132. smf_db_error_backtrace('Wrong value type sent to the database. Integer expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  133. return (string) (int) $replacement;
  134. break;
  135. case 'string':
  136. case 'text':
  137. return sprintf('\'%1$s\'', mysql_real_escape_string($replacement, $connection));
  138. break;
  139. case 'array_int':
  140. if (is_array($replacement))
  141. {
  142. if (empty($replacement))
  143. smf_db_error_backtrace('Database error, given array of integer values is empty. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  144. foreach ($replacement as $key => $value)
  145. {
  146. if (!is_numeric($value) || (string) $value !== (string) (int) $value)
  147. smf_db_error_backtrace('Wrong value type sent to the database. Array of integers expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  148. $replacement[$key] = (string) (int) $value;
  149. }
  150. return implode(', ', $replacement);
  151. }
  152. else
  153. smf_db_error_backtrace('Wrong value type sent to the database. Array of integers expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  154. break;
  155. case 'array_string':
  156. if (is_array($replacement))
  157. {
  158. if (empty($replacement))
  159. smf_db_error_backtrace('Database error, given array of string values is empty. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  160. foreach ($replacement as $key => $value)
  161. $replacement[$key] = sprintf('\'%1$s\'', mysql_real_escape_string($value, $connection));
  162. return implode(', ', $replacement);
  163. }
  164. else
  165. smf_db_error_backtrace('Wrong value type sent to the database. Array of strings expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  166. break;
  167. case 'date':
  168. if (preg_match('~^(\d{4})-([0-1]?\d)-([0-3]?\d)$~', $replacement, $date_matches) === 1)
  169. return sprintf('\'%04d-%02d-%02d\'', $date_matches[1], $date_matches[2], $date_matches[3]);
  170. else
  171. smf_db_error_backtrace('Wrong value type sent to the database. Date expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  172. break;
  173. case 'float':
  174. if (!is_numeric($replacement))
  175. smf_db_error_backtrace('Wrong value type sent to the database. Floating point number expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  176. return (string) (float) $replacement;
  177. break;
  178. case 'identifier':
  179. // Backticks inside identifiers are supported as of MySQL 4.1. We don't need them for SMF.
  180. return '`' . strtr($replacement, array('`' => '', '.' => '')) . '`';
  181. break;
  182. case 'raw':
  183. return $replacement;
  184. break;
  185. default:
  186. smf_db_error_backtrace('Undefined type used in the database query. (' . $matches[1] . ':' . $matches[2] . ')', '', false, __FILE__, __LINE__);
  187. break;
  188. }
  189. }
  190. /**
  191. * Just like the db_query, escape and quote a string, but not executing the query.
  192. *
  193. * @param string $db_string
  194. * @param array $db_values
  195. * @param resource $connection = null
  196. */
  197. function smf_db_quote($db_string, $db_values, $connection = null)
  198. {
  199. global $db_callback, $db_connection;
  200. // Only bother if there's something to replace.
  201. if (strpos($db_string, '{') !== false)
  202. {
  203. // This is needed by the callback function.
  204. $db_callback = array($db_values, $connection === null ? $db_connection : $connection);
  205. // Do the quoting and escaping
  206. $db_string = preg_replace_callback('~{([a-z_]+)(?::([a-zA-Z0-9_-]+))?}~', 'smf_db_replacement__callback', $db_string);
  207. // Clear this global variable.
  208. $db_callback = array();
  209. }
  210. return $db_string;
  211. }
  212. /**
  213. * Do a query. Takes care of errors too.
  214. *
  215. * @param string $identifier
  216. * @param string $db_string
  217. * @param array $db_values = array()
  218. * @param resource $connection = null
  219. */
  220. function smf_db_query($identifier, $db_string, $db_values = array(), $connection = null)
  221. {
  222. global $db_cache, $db_count, $db_connection, $db_show_debug, $time_start;
  223. global $db_unbuffered, $db_callback, $modSettings;
  224. // Comments that are allowed in a query are preg_removed.
  225. static $allowed_comments_from = array(
  226. '~\s+~s',
  227. '~/\*!40001 SQL_NO_CACHE \*/~',
  228. '~/\*!40000 USE INDEX \([A-Za-z\_]+?\) \*/~',
  229. '~/\*!40100 ON DUPLICATE KEY UPDATE id_msg = \d+ \*/~',
  230. );
  231. static $allowed_comments_to = array(
  232. ' ',
  233. '',
  234. '',
  235. '',
  236. );
  237. // Decide which connection to use.
  238. $connection = $connection === null ? $db_connection : $connection;
  239. // One more query....
  240. $db_count = !isset($db_count) ? 1 : $db_count + 1;
  241. if (empty($modSettings['disableQueryCheck']) && strpos($db_string, '\'') !== false && empty($db_values['security_override']))
  242. smf_db_error_backtrace('Hacking attempt...', 'Illegal character (\') used in query...', true, __FILE__, __LINE__);
  243. // Use "ORDER BY null" to prevent Mysql doing filesorts for Group By clauses without an Order By
  244. if (strpos($db_string, 'GROUP BY') !== false && strpos($db_string, 'ORDER BY') === false && strpos($db_string, 'INSERT INTO') === false)
  245. {
  246. // Add before LIMIT
  247. if ($pos = strpos($db_string, 'LIMIT '))
  248. $db_string = substr($db_string, 0, $pos) . "\t\t\tORDER BY null\n" . substr($db_string, $pos, strlen($db_string));
  249. else
  250. // Append it.
  251. $db_string .= "\n\t\t\tORDER BY null";
  252. }
  253. if (empty($db_values['security_override']) && (!empty($db_values) || strpos($db_string, '{db_prefix}') !== false))
  254. {
  255. // Pass some values to the global space for use in the callback function.
  256. $db_callback = array($db_values, $connection);
  257. // Inject the values passed to this function.
  258. $db_string = preg_replace_callback('~{([a-z_]+)(?::([a-zA-Z0-9_-]+))?}~', 'smf_db_replacement__callback', $db_string);
  259. // This shouldn't be residing in global space any longer.
  260. $db_callback = array();
  261. }
  262. // Debugging.
  263. if (isset($db_show_debug) && $db_show_debug === true)
  264. {
  265. // Get the file and line number this function was called.
  266. list ($file, $line) = smf_db_error_backtrace('', '', 'return', __FILE__, __LINE__);
  267. // Initialize $db_cache if not already initialized.
  268. if (!isset($db_cache))
  269. $db_cache = array();
  270. if (!empty($_SESSION['debug_redirect']))
  271. {
  272. $db_cache = array_merge($_SESSION['debug_redirect'], $db_cache);
  273. $db_count = count($db_cache) + 1;
  274. $_SESSION['debug_redirect'] = array();
  275. }
  276. // Don't overload it.
  277. $st = microtime();
  278. $db_cache[$db_count]['q'] = $db_count < 50 ? $db_string : '...';
  279. $db_cache[$db_count]['f'] = $file;
  280. $db_cache[$db_count]['l'] = $line;
  281. $db_cache[$db_count]['s'] = array_sum(explode(' ', $st)) - array_sum(explode(' ', $time_start));
  282. }
  283. // First, we clean strings out of the query, reduce whitespace, lowercase, and trim - so we can check it over.
  284. if (empty($modSettings['disableQueryCheck']))
  285. {
  286. $clean = '';
  287. $old_pos = 0;
  288. $pos = -1;
  289. while (true)
  290. {
  291. $pos = strpos($db_string, '\'', $pos + 1);
  292. if ($pos === false)
  293. break;
  294. $clean .= substr($db_string, $old_pos, $pos - $old_pos);
  295. while (true)
  296. {
  297. $pos1 = strpos($db_string, '\'', $pos + 1);
  298. $pos2 = strpos($db_string, '\\', $pos + 1);
  299. if ($pos1 === false)
  300. break;
  301. elseif ($pos2 == false || $pos2 > $pos1)
  302. {
  303. $pos = $pos1;
  304. break;
  305. }
  306. $pos = $pos2 + 1;
  307. }
  308. $clean .= ' %s ';
  309. $old_pos = $pos + 1;
  310. }
  311. $clean .= substr($db_string, $old_pos);
  312. $clean = trim(strtolower(preg_replace($allowed_comments_from, $allowed_comments_to, $clean)));
  313. // We don't use UNION in SMF, at least so far. But it's useful for injections.
  314. if (strpos($clean, 'union') !== false && preg_match('~(^|[^a-z])union($|[^[a-z])~s', $clean) != 0)
  315. $fail = true;
  316. // Comments? We don't use comments in our queries, we leave 'em outside!
  317. elseif (strpos($clean, '/*') > 2 || strpos($clean, '--') !== false || strpos($clean, ';') !== false)
  318. $fail = true;
  319. // Trying to change passwords, slow us down, or something?
  320. elseif (strpos($clean, 'sleep') !== false && preg_match('~(^|[^a-z])sleep($|[^[_a-z])~s', $clean) != 0)
  321. $fail = true;
  322. elseif (strpos($clean, 'benchmark') !== false && preg_match('~(^|[^a-z])benchmark($|[^[a-z])~s', $clean) != 0)
  323. $fail = true;
  324. // Sub selects? We don't use those either.
  325. elseif (preg_match('~\([^)]*?select~s', $clean) != 0)
  326. $fail = true;
  327. if (!empty($fail) && function_exists('log_error'))
  328. smf_db_error_backtrace('Hacking attempt...', 'Hacking attempt...' . "\n" . $db_string, E_USER_ERROR, __FILE__, __LINE__);
  329. }
  330. if (empty($db_unbuffered))
  331. $ret = @mysql_query($db_string, $connection);
  332. else
  333. $ret = @mysql_unbuffered_query($db_string, $connection);
  334. if ($ret === false && empty($db_values['db_error_skip']))
  335. $ret = smf_db_error($db_string, $connection);
  336. // Debugging.
  337. if (isset($db_show_debug) && $db_show_debug === true)
  338. $db_cache[$db_count]['t'] = array_sum(explode(' ', microtime())) - array_sum(explode(' ', $st));
  339. return $ret;
  340. }
  341. /**
  342. * affected_rows
  343. * @param resource $connection
  344. */
  345. function smf_db_affected_rows($connection = null)
  346. {
  347. global $db_connection;
  348. return mysql_affected_rows($connection === null ? $db_connection : $connection);
  349. }
  350. /**
  351. * insert_id
  352. *
  353. * @param string $table
  354. * @param string $field = null
  355. * @param resource $connection = null
  356. */
  357. function smf_db_insert_id($table, $field = null, $connection = null)
  358. {
  359. global $db_connection, $db_prefix;
  360. $table = str_replace('{db_prefix}', $db_prefix, $table);
  361. // MySQL doesn't need the table or field information.
  362. return mysql_insert_id($connection === null ? $db_connection : $connection);
  363. }
  364. /**
  365. * Do a transaction.
  366. *
  367. * @param string $type - the step to perform (i.e. 'begin', 'commit', 'rollback')
  368. * @param resource $connection = null
  369. */
  370. function smf_db_transaction($type = 'commit', $connection = null)
  371. {
  372. global $db_connection;
  373. // Decide which connection to use
  374. $connection = $connection === null ? $db_connection : $connection;
  375. if ($type == 'begin')
  376. return @mysql_query('BEGIN', $connection);
  377. elseif ($type == 'rollback')
  378. return @mysql_query('ROLLBACK', $connection);
  379. elseif ($type == 'commit')
  380. return @mysql_query('COMMIT', $connection);
  381. return false;
  382. }
  383. /**
  384. * Database error!
  385. * Backtrace, log, try to fix.
  386. *
  387. * @param string $db_string
  388. * @param resource $connection = null
  389. */
  390. function smf_db_error($db_string, $connection = null)
  391. {
  392. global $txt, $context, $sourcedir, $webmaster_email, $modSettings;
  393. global $forum_version, $db_connection, $db_last_error, $db_persist;
  394. global $db_server, $db_user, $db_passwd, $db_name, $db_show_debug, $ssi_db_user, $ssi_db_passwd;
  395. global $smcFunc;
  396. // Get the file and line numbers.
  397. list ($file, $line) = smf_db_error_backtrace('', '', 'return', __FILE__, __LINE__);
  398. // Decide which connection to use
  399. $connection = $connection === null ? $db_connection : $connection;
  400. // This is the error message...
  401. $query_error = mysql_error($connection);
  402. $query_errno = mysql_errno($connection);
  403. // Error numbers:
  404. // 1016: Can't open file '....MYI'
  405. // 1030: Got error ??? from table handler.
  406. // 1034: Incorrect key file for table.
  407. // 1035: Old key file for table.
  408. // 1205: Lock wait timeout exceeded.
  409. // 1213: Deadlock found.
  410. // 2006: Server has gone away.
  411. // 2013: Lost connection to server during query.
  412. // Log the error.
  413. if ($query_errno != 1213 && $query_errno != 1205 && function_exists('log_error'))
  414. log_error($txt['database_error'] . ': ' . $query_error . (!empty($modSettings['enableErrorQueryLogging']) ? "\n\n$db_string" : ''), 'database', $file, $line);
  415. // Database error auto fixing ;).
  416. if (function_exists('cache_get_data') && (!isset($modSettings['autoFixDatabase']) || $modSettings['autoFixDatabase'] == '1'))
  417. {
  418. // Force caching on, just for the error checking.
  419. $old_cache = @$modSettings['cache_enable'];
  420. $modSettings['cache_enable'] = '1';
  421. if (($temp = cache_get_data('db_last_error', 600)) !== null)
  422. $db_last_error = max(@$db_last_error, $temp);
  423. if (@$db_last_error < time() - 3600 * 24 * 3)
  424. {
  425. // We know there's a problem... but what? Try to auto detect.
  426. if ($query_errno == 1030 && strpos($query_error, ' 127 ') !== false)
  427. {
  428. preg_match_all('~(?:[\n\r]|^)[^\']+?(?:FROM|JOIN|UPDATE|TABLE) ((?:[^\n\r(]+?(?:, )?)*)~s', $db_string, $matches);
  429. $fix_tables = array();
  430. foreach ($matches[1] as $tables)
  431. {
  432. $tables = array_unique(explode(',', $tables));
  433. foreach ($tables as $table)
  434. {
  435. // Now, it's still theoretically possible this could be an injection. So backtick it!
  436. if (trim($table) != '')
  437. $fix_tables[] = '`' . strtr(trim($table), array('`' => '')) . '`';
  438. }
  439. }
  440. $fix_tables = array_unique($fix_tables);
  441. }
  442. // Table crashed. Let's try to fix it.
  443. elseif ($query_errno == 1016)
  444. {
  445. if (preg_match('~\'([^\.\']+)~', $query_error, $match) != 0)
  446. $fix_tables = array('`' . $match[1] . '`');
  447. }
  448. // Indexes crashed. Should be easy to fix!
  449. elseif ($query_errno == 1034 || $query_errno == 1035)
  450. {
  451. preg_match('~\'([^\']+?)\'~', $query_error, $match);
  452. $fix_tables = array('`' . $match[1] . '`');
  453. }
  454. }
  455. // Check for errors like 145... only fix it once every three days, and send an email. (can't use empty because it might not be set yet...)
  456. if (!empty($fix_tables))
  457. {
  458. // Subs-Admin.php for updateSettingsFile(), Subs-Post.php for sendmail().
  459. require_once($sourcedir . '/Subs-Admin.php');
  460. require_once($sourcedir . '/Subs-Post.php');
  461. // Make a note of the REPAIR...
  462. cache_put_data('db_last_error', time(), 600);
  463. if (($temp = cache_get_data('db_last_error', 600)) === null)
  464. updateSettingsFile(array('db_last_error' => time()));
  465. // Attempt to find and repair the broken table.
  466. foreach ($fix_tables as $table)
  467. $smcFunc['db_query']('', "
  468. REPAIR TABLE $table", false, false);
  469. // And send off an email!
  470. sendmail($webmaster_email, $txt['database_error'], $txt['tried_to_repair']);
  471. $modSettings['cache_enable'] = $old_cache;
  472. // Try the query again...?
  473. $ret = $smcFunc['db_query']('', $db_string, false, false);
  474. if ($ret !== false)
  475. return $ret;
  476. }
  477. else
  478. $modSettings['cache_enable'] = $old_cache;
  479. // Check for the "lost connection" or "deadlock found" errors - and try it just one more time.
  480. if (in_array($query_errno, array(1205, 1213, 2006, 2013)))
  481. {
  482. if (in_array($query_errno, array(2006, 2013)) && $db_connection == $connection)
  483. {
  484. // Are we in SSI mode? If so try that username and password first
  485. if (SMF == 'SSI' && !empty($ssi_db_user) && !empty($ssi_db_passwd))
  486. {
  487. if (empty($db_persist))
  488. $db_connection = @mysql_connect($db_server, $ssi_db_user, $ssi_db_passwd);
  489. else
  490. $db_connection = @mysql_pconnect($db_server, $ssi_db_user, $ssi_db_passwd);
  491. }
  492. // Fall back to the regular username and password if need be
  493. if (!$db_connection)
  494. {
  495. if (empty($db_persist))
  496. $db_connection = @mysql_connect($db_server, $db_user, $db_passwd);
  497. else
  498. $db_connection = @mysql_pconnect($db_server, $db_user, $db_passwd);
  499. }
  500. if (!$db_connection || !@mysql_select_db($db_name, $db_connection))
  501. $db_connection = false;
  502. }
  503. if ($db_connection)
  504. {
  505. // Try a deadlock more than once more.
  506. for ($n = 0; $n < 4; $n++)
  507. {
  508. $ret = $smcFunc['db_query']('', $db_string, false, false);
  509. $new_errno = mysql_errno($db_connection);
  510. if ($ret !== false || in_array($new_errno, array(1205, 1213)))
  511. break;
  512. }
  513. // If it failed again, shucks to be you... we're not trying it over and over.
  514. if ($ret !== false)
  515. return $ret;
  516. }
  517. }
  518. // Are they out of space, perhaps?
  519. elseif ($query_errno == 1030 && (strpos($query_error, ' -1 ') !== false || strpos($query_error, ' 28 ') !== false || strpos($query_error, ' 12 ') !== false))
  520. {
  521. if (!isset($txt))
  522. $query_error .= ' - check database storage space.';
  523. else
  524. {
  525. if (!isset($txt['mysql_error_space']))
  526. loadLanguage('Errors');
  527. $query_error .= !isset($txt['mysql_error_space']) ? ' - check database storage space.' : $txt['mysql_error_space'];
  528. }
  529. }
  530. }
  531. // Nothing's defined yet... just die with it.
  532. if (empty($context) || empty($txt))
  533. die($query_error);
  534. // Show an error message, if possible.
  535. $context['error_title'] = $txt['database_error'];
  536. if (allowedTo('admin_forum'))
  537. $context['error_message'] = nl2br($query_error) . '<br />' . $txt['file'] . ': ' . $file . '<br />' . $txt['line'] . ': ' . $line;
  538. else
  539. $context['error_message'] = $txt['try_again'];
  540. // A database error is often the sign of a database in need of upgrade. Check forum versions, and if not identical suggest an upgrade... (not for Demo/CVS versions!)
  541. if (allowedTo('admin_forum') && !empty($forum_version) && $forum_version != 'SMF ' . @$modSettings['smfVersion'] && strpos($forum_version, 'Demo') === false && strpos($forum_version, 'CVS') === false)
  542. $context['error_message'] .= '<br /><br />' . sprintf($txt['database_error_versions'], $forum_version, $modSettings['smfVersion']);
  543. if (allowedTo('admin_forum') && isset($db_show_debug) && $db_show_debug === true)
  544. {
  545. $context['error_message'] .= '<br /><br />' . nl2br($db_string);
  546. }
  547. // It's already been logged... don't log it again.
  548. fatal_error($context['error_message'], false);
  549. }
  550. /**
  551. * insert
  552. *
  553. * @param string $method - options 'replace', 'ignore', 'insert'
  554. * @param $table
  555. * @param $columns
  556. * @param $data
  557. * @param $keys
  558. * @param bool $disable_trans = false
  559. * @param resource $connection = null
  560. */
  561. function smf_db_insert($method = 'replace', $table, $columns, $data, $keys, $disable_trans = false, $connection = null)
  562. {
  563. global $smcFunc, $db_connection, $db_prefix;
  564. $connection = $connection === null ? $db_connection : $connection;
  565. // With nothing to insert, simply return.
  566. if (empty($data))
  567. return;
  568. // Replace the prefix holder with the actual prefix.
  569. $table = str_replace('{db_prefix}', $db_prefix, $table);
  570. // Inserting data as a single row can be done as a single array.
  571. if (!is_array($data[array_rand($data)]))
  572. $data = array($data);
  573. // Create the mold for a single row insert.
  574. $insertData = '(';
  575. foreach ($columns as $columnName => $type)
  576. {
  577. // Are we restricting the length?
  578. if (strpos($type, 'string-') !== false)
  579. $insertData .= sprintf('SUBSTRING({string:%1$s}, 1, ' . substr($type, 7) . '), ', $columnName);
  580. else
  581. $insertData .= sprintf('{%1$s:%2$s}, ', $type, $columnName);
  582. }
  583. $insertData = substr($insertData, 0, -2) . ')';
  584. // Create an array consisting of only the columns.
  585. $indexed_columns = array_keys($columns);
  586. // Here's where the variables are injected to the query.
  587. $insertRows = array();
  588. foreach ($data as $dataRow)
  589. $insertRows[] = smf_db_quote($insertData, array_combine($indexed_columns, $dataRow), $connection);
  590. // Determine the method of insertion.
  591. $queryTitle = $method == 'replace' ? 'REPLACE' : ($method == 'ignore' ? 'INSERT IGNORE' : 'INSERT');
  592. // Do the insert.
  593. $smcFunc['db_query']('', '
  594. ' . $queryTitle . ' INTO ' . $table . '(`' . implode('`, `', $indexed_columns) . '`)
  595. VALUES
  596. ' . implode(',
  597. ', $insertRows),
  598. array(
  599. 'security_override' => true,
  600. 'db_error_skip' => $table === $db_prefix . 'log_errors',
  601. ),
  602. $connection
  603. );
  604. }
  605. /**
  606. * This function tries to work out additional error information from a back trace.
  607. *
  608. * @param $error_message
  609. * @param $log_message
  610. * @param $error_type
  611. * @param $file
  612. * @param $line
  613. */
  614. function smf_db_error_backtrace($error_message, $log_message = '', $error_type = false, $file = null, $line = null)
  615. {
  616. if (empty($log_message))
  617. $log_message = $error_message;
  618. foreach (debug_backtrace() as $step)
  619. {
  620. // Found it?
  621. if (strpos($step['function'], 'query') === false && !in_array(substr($step['function'], 0, 7), array('smf_db_', 'preg_re', 'db_erro', 'call_us')) && strpos($step['function'], '__') !== 0)
  622. {
  623. $log_message .= '<br />Function: ' . $step['function'];
  624. break;
  625. }
  626. if (isset($step['line']))
  627. {
  628. $file = $step['file'];
  629. $line = $step['line'];
  630. }
  631. }
  632. // A special case - we want the file and line numbers for debugging.
  633. if ($error_type == 'return')
  634. return array($file, $line);
  635. // Is always a critical error.
  636. if (function_exists('log_error'))
  637. log_error($log_message, 'critical', $file, $line);
  638. if (function_exists('fatal_error'))
  639. {
  640. fatal_error($error_message, false);
  641. // Cannot continue...
  642. exit;
  643. }
  644. elseif ($error_type)
  645. trigger_error($error_message . ($line !== null ? '<em>(' . basename($file) . '-' . $line . ')</em>' : ''), $error_type);
  646. else
  647. trigger_error($error_message . ($line !== null ? '<em>(' . basename($file) . '-' . $line . ')</em>' : ''));
  648. }
  649. /**
  650. * Escape the LIKE wildcards so that they match the character and not the wildcard.
  651. *
  652. * @param $string
  653. * @param bool $translate_human_wildcards = false, if true, turns human readable wildcards into SQL wildcards.
  654. */
  655. function smf_db_escape_wildcard_string($string, $translate_human_wildcards=false)
  656. {
  657. $replacements = array(
  658. '%' => '\%',
  659. '_' => '\_',
  660. '\\' => '\\\\',
  661. );
  662. if ($translate_human_wildcards)
  663. $replacements += array(
  664. '*' => '%',
  665. );
  666. return strtr($string, $replacements);
  667. }
  668. ?>