Chris@76: <?php
Chris@76: 
Chris@76: /**
Chris@76:  * Simple Machines Forum (SMF)
Chris@76:  *
Chris@76:  * @package SMF
Chris@76:  * @author Simple Machines http://www.simplemachines.org
Chris@76:  * @copyright 2011 Simple Machines
Chris@76:  * @license http://www.simplemachines.org/about/smf/license.php BSD
Chris@76:  *
Chris@76:  * @version 2.0.4
Chris@76:  */
Chris@76: 
Chris@76: if (!defined('SMF'))
Chris@76: 	die('Hacking attempt...');
Chris@76: 
Chris@76: /*	This file has all the main functions in it that relate to the database.
Chris@76: 
Chris@76: 	smf_db_initiate() maps the implementations in this file (smf_db_function_name)
Chris@76: 	to the $smcFunc['db_function_name'] variable.
Chris@76: 
Chris@76: */
Chris@76: 
Chris@76: // Initialize the database settings
Chris@76: function smf_db_initiate($db_server, $db_name, $db_user, $db_passwd, $db_prefix, $db_options = array())
Chris@76: {
Chris@76: 	global $smcFunc, $mysql_set_mode;
Chris@76: 
Chris@76: 	// Map some database specific functions, only do this once.
Chris@76: 	if (!isset($smcFunc['db_fetch_assoc']) || $smcFunc['db_fetch_assoc'] != 'mysql_fetch_assoc')
Chris@76: 		$smcFunc += array(
Chris@76: 			'db_query' => 'smf_db_query',
Chris@76: 			'db_quote' => 'smf_db_quote',
Chris@76: 			'db_fetch_assoc' => 'mysql_fetch_assoc',
Chris@76: 			'db_fetch_row' => 'mysql_fetch_row',
Chris@76: 			'db_free_result' => 'mysql_free_result',
Chris@76: 			'db_insert' => 'smf_db_insert',
Chris@76: 			'db_insert_id' => 'smf_db_insert_id',
Chris@76: 			'db_num_rows' => 'mysql_num_rows',
Chris@76: 			'db_data_seek' => 'mysql_data_seek',
Chris@76: 			'db_num_fields' => 'mysql_num_fields',
Chris@76: 			'db_escape_string' => 'addslashes',
Chris@76: 			'db_unescape_string' => 'stripslashes',
Chris@76: 			'db_server_info' => 'mysql_get_server_info',
Chris@76: 			'db_affected_rows' => 'smf_db_affected_rows',
Chris@76: 			'db_transaction' => 'smf_db_transaction',
Chris@76: 			'db_error' => 'mysql_error',
Chris@76: 			'db_select_db' => 'mysql_select_db',
Chris@76: 			'db_title' => 'MySQL',
Chris@76: 			'db_sybase' => false,
Chris@76: 			'db_case_sensitive' => false,
Chris@76: 			'db_escape_wildcard_string' => 'smf_db_escape_wildcard_string',
Chris@76: 		);
Chris@76: 
Chris@76: 	if (!empty($db_options['persist']))
Chris@76: 		$connection = @mysql_pconnect($db_server, $db_user, $db_passwd);
Chris@76: 	else
Chris@76: 		$connection = @mysql_connect($db_server, $db_user, $db_passwd);
Chris@76: 
Chris@76: 	// Something's wrong, show an error if its fatal (which we assume it is)
Chris@76: 	if (!$connection)
Chris@76: 	{
Chris@76: 		if (!empty($db_options['non_fatal']))
Chris@76: 			return null;
Chris@76: 		else
Chris@76: 			db_fatal_error();
Chris@76: 	}
Chris@76: 
Chris@76: 	// Select the database, unless told not to
Chris@76: 	if (empty($db_options['dont_select_db']) && !@mysql_select_db($db_name, $connection) && empty($db_options['non_fatal']))
Chris@76: 		db_fatal_error();
Chris@76: 
Chris@76: 	// This makes it possible to have SMF automatically change the sql_mode and autocommit if needed.
Chris@76: 	if (isset($mysql_set_mode) && $mysql_set_mode === true)
Chris@76: 		$smcFunc['db_query']('', 'SET sql_mode = \'\', AUTOCOMMIT = 1',
Chris@76: 		array(),
Chris@76: 		false
Chris@76: 	);
Chris@76: 
Chris@76: 	return $connection;
Chris@76: }
Chris@76: 
Chris@76: // Extend the database functionality.
Chris@76: function db_extend($type = 'extra')
Chris@76: {
Chris@76: 	global $sourcedir, $db_type;
Chris@76: 
Chris@76: 	require_once($sourcedir . '/Db' . strtoupper($type[0]) . substr($type, 1) . '-' . $db_type . '.php');
Chris@76: 	$initFunc = 'db_' . $type . '_init';
Chris@76: 	$initFunc();
Chris@76: }
Chris@76: 
Chris@76: // Fix up the prefix so it doesn't require the database to be selected.
Chris@76: function db_fix_prefix(&$db_prefix, $db_name)
Chris@76: {
Chris@76: 	$db_prefix = is_numeric(substr($db_prefix, 0, 1)) ? $db_name . '.' . $db_prefix : '`' . $db_name . '`.' . $db_prefix;
Chris@76: }
Chris@76: 
Chris@76: function smf_db_replacement__callback($matches)
Chris@76: {
Chris@76: 	global $db_callback, $user_info, $db_prefix;
Chris@76: 
Chris@76: 	list ($values, $connection) = $db_callback;
Chris@76: 
Chris@76: 	if (!is_resource($connection))
Chris@76: 		db_fatal_error();
Chris@76: 
Chris@76: 	if ($matches[1] === 'db_prefix')
Chris@76: 		return $db_prefix;
Chris@76: 
Chris@76: 	if ($matches[1] === 'query_see_board')
Chris@76: 		return $user_info['query_see_board'];
Chris@76: 
Chris@76: 	if ($matches[1] === 'query_wanna_see_board')
Chris@76: 		return $user_info['query_wanna_see_board'];
Chris@76: 
Chris@76: 	if (!isset($matches[2]))
Chris@76: 		smf_db_error_backtrace('Invalid value inserted or no type specified.', '', E_USER_ERROR, __FILE__, __LINE__);
Chris@76: 
Chris@76: 	if (!isset($values[$matches[2]]))
Chris@76: 		smf_db_error_backtrace('The database value you\'re trying to insert does not exist: ' . htmlspecialchars($matches[2]), '', E_USER_ERROR, __FILE__, __LINE__);
Chris@76: 
Chris@76: 	$replacement = $values[$matches[2]];
Chris@76: 
Chris@76: 	switch ($matches[1])
Chris@76: 	{
Chris@76: 		case 'int':
Chris@76: 			if (!is_numeric($replacement) || (string) $replacement !== (string) (int) $replacement)
Chris@76: 				smf_db_error_backtrace('Wrong value type sent to the database. Integer expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
Chris@76: 			return (string) (int) $replacement;
Chris@76: 		break;
Chris@76: 
Chris@76: 		case 'string':
Chris@76: 		case 'text':
Chris@76: 			return sprintf('\'%1$s\'', mysql_real_escape_string($replacement, $connection));
Chris@76: 		break;
Chris@76: 
Chris@76: 		case 'array_int':
Chris@76: 			if (is_array($replacement))
Chris@76: 			{
Chris@76: 				if (empty($replacement))
Chris@76: 					smf_db_error_backtrace('Database error, given array of integer values is empty. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
Chris@76: 
Chris@76: 				foreach ($replacement as $key => $value)
Chris@76: 				{
Chris@76: 					if (!is_numeric($value) || (string) $value !== (string) (int) $value)
Chris@76: 						smf_db_error_backtrace('Wrong value type sent to the database. Array of integers expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
Chris@76: 
Chris@76: 					$replacement[$key] = (string) (int) $value;
Chris@76: 				}
Chris@76: 
Chris@76: 				return implode(', ', $replacement);
Chris@76: 			}
Chris@76: 			else
Chris@76: 				smf_db_error_backtrace('Wrong value type sent to the database. Array of integers expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
Chris@76: 
Chris@76: 		break;
Chris@76: 
Chris@76: 		case 'array_string':
Chris@76: 			if (is_array($replacement))
Chris@76: 			{
Chris@76: 				if (empty($replacement))
Chris@76: 					smf_db_error_backtrace('Database error, given array of string values is empty. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
Chris@76: 
Chris@76: 				foreach ($replacement as $key => $value)
Chris@76: 					$replacement[$key] = sprintf('\'%1$s\'', mysql_real_escape_string($value, $connection));
Chris@76: 
Chris@76: 				return implode(', ', $replacement);
Chris@76: 			}
Chris@76: 			else
Chris@76: 				smf_db_error_backtrace('Wrong value type sent to the database. Array of strings expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
Chris@76: 		break;
Chris@76: 
Chris@76: 		case 'date':
Chris@76: 			if (preg_match('~^(\d{4})-([0-1]?\d)-([0-3]?\d)$~', $replacement, $date_matches) === 1)
Chris@76: 				return sprintf('\'%04d-%02d-%02d\'', $date_matches[1], $date_matches[2], $date_matches[3]);
Chris@76: 			else
Chris@76: 				smf_db_error_backtrace('Wrong value type sent to the database. Date expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
Chris@76: 		break;
Chris@76: 
Chris@76: 		case 'float':
Chris@76: 			if (!is_numeric($replacement))
Chris@76: 				smf_db_error_backtrace('Wrong value type sent to the database. Floating point number expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
Chris@76: 			return (string) (float) $replacement;
Chris@76: 		break;
Chris@76: 
Chris@76: 		case 'identifier':
Chris@76: 			// Backticks inside identifiers are supported as of MySQL 4.1. We don't need them for SMF.
Chris@76: 			return '`' . strtr($replacement, array('`' => '', '.' => '')) . '`';
Chris@76: 		break;
Chris@76: 
Chris@76: 		case 'raw':
Chris@76: 			return $replacement;
Chris@76: 		break;
Chris@76: 
Chris@76: 		default:
Chris@76: 			smf_db_error_backtrace('Undefined type used in the database query. (' . $matches[1] . ':' . $matches[2] . ')', '', false, __FILE__, __LINE__);
Chris@76: 		break;
Chris@76: 	}
Chris@76: }
Chris@76: 
Chris@76: // Just like the db_query, escape and quote a string, but not executing the query.
Chris@76: function smf_db_quote($db_string, $db_values, $connection = null)
Chris@76: {
Chris@76: 	global $db_callback, $db_connection;
Chris@76: 
Chris@76: 	// Only bother if there's something to replace.
Chris@76: 	if (strpos($db_string, '{') !== false)
Chris@76: 	{
Chris@76: 		// This is needed by the callback function.
Chris@76: 		$db_callback = array($db_values, $connection == null ? $db_connection : $connection);
Chris@76: 
Chris@76: 		// Do the quoting and escaping
Chris@76: 		$db_string = preg_replace_callback('~{([a-z_]+)(?::([a-zA-Z0-9_-]+))?}~', 'smf_db_replacement__callback', $db_string);
Chris@76: 
Chris@76: 		// Clear this global variable.
Chris@76: 		$db_callback = array();
Chris@76: 	}
Chris@76: 
Chris@76: 	return $db_string;
Chris@76: }
Chris@76: 
Chris@76: // Do a query.  Takes care of errors too.
Chris@76: function smf_db_query($identifier, $db_string, $db_values = array(), $connection = null)
Chris@76: {
Chris@76: 	global $db_cache, $db_count, $db_connection, $db_show_debug, $time_start;
Chris@76: 	global $db_unbuffered, $db_callback, $modSettings;
Chris@76: 
Chris@76: 	// Comments that are allowed in a query are preg_removed.
Chris@76: 	static $allowed_comments_from = array(
Chris@76: 		'~\s+~s',
Chris@76: 		'~/\*!40001 SQL_NO_CACHE \*/~',
Chris@76: 		'~/\*!40000 USE INDEX \([A-Za-z\_]+?\) \*/~',
Chris@76: 		'~/\*!40100 ON DUPLICATE KEY UPDATE id_msg = \d+ \*/~',
Chris@76: 	);
Chris@76: 	static $allowed_comments_to = array(
Chris@76: 		' ',
Chris@76: 		'',
Chris@76: 		'',
Chris@76: 		'',
Chris@76: 	);
Chris@76: 
Chris@76: 	// Decide which connection to use.
Chris@76: 	$connection = $connection == null ? $db_connection : $connection;
Chris@76: 
Chris@76: 	// One more query....
Chris@76: 	$db_count = !isset($db_count) ? 1 : $db_count + 1;
Chris@76: 
Chris@76: 	if (empty($modSettings['disableQueryCheck']) && strpos($db_string, '\'') !== false && empty($db_values['security_override']))
Chris@76: 		smf_db_error_backtrace('Hacking attempt...', 'Illegal character (\') used in query...', true, __FILE__, __LINE__);
Chris@76: 
Chris@76: 	// Use "ORDER BY null" to prevent Mysql doing filesorts for Group By clauses without an Order By
Chris@76: 	if (strpos($db_string, 'GROUP BY') !== false && strpos($db_string, 'ORDER BY') === false && strpos($db_string, 'INSERT INTO') === false)
Chris@76: 	{
Chris@76: 		// Add before LIMIT
Chris@76: 		if ($pos = strpos($db_string, 'LIMIT '))
Chris@76: 			$db_string = substr($db_string, 0, $pos) . "\t\t\tORDER BY null\n" . substr($db_string, $pos, strlen($db_string));
Chris@76: 		else
Chris@76: 			// Append it.
Chris@76: 			$db_string .= "\n\t\t\tORDER BY null";
Chris@76: 	}
Chris@76: 
Chris@76: 	if (empty($db_values['security_override']) && (!empty($db_values) || strpos($db_string, '{db_prefix}') !== false))
Chris@76: 	{
Chris@76: 		// Pass some values to the global space for use in the callback function.
Chris@76: 		$db_callback = array($db_values, $connection);
Chris@76: 
Chris@76: 		// Inject the values passed to this function.
Chris@76: 		$db_string = preg_replace_callback('~{([a-z_]+)(?::([a-zA-Z0-9_-]+))?}~', 'smf_db_replacement__callback', $db_string);
Chris@76: 
Chris@76: 		// This shouldn't be residing in global space any longer.
Chris@76: 		$db_callback = array();
Chris@76: 	}
Chris@76: 
Chris@76: 	// Debugging.
Chris@76: 	if (isset($db_show_debug) && $db_show_debug === true)
Chris@76: 	{
Chris@76: 		// Get the file and line number this function was called.
Chris@76: 		list ($file, $line) = smf_db_error_backtrace('', '', 'return', __FILE__, __LINE__);
Chris@76: 
Chris@76: 		// Initialize $db_cache if not already initialized.
Chris@76: 		if (!isset($db_cache))
Chris@76: 			$db_cache = array();
Chris@76: 
Chris@76: 		if (!empty($_SESSION['debug_redirect']))
Chris@76: 		{
Chris@76: 			$db_cache = array_merge($_SESSION['debug_redirect'], $db_cache);
Chris@76: 			$db_count = count($db_cache) + 1;
Chris@76: 			$_SESSION['debug_redirect'] = array();
Chris@76: 		}
Chris@76: 
Chris@76: 		$st = microtime();
Chris@76: 		// Don't overload it.
Chris@76: 		$db_cache[$db_count]['q'] = $db_count < 50 ? $db_string : '...';
Chris@76: 		$db_cache[$db_count]['f'] = $file;
Chris@76: 		$db_cache[$db_count]['l'] = $line;
Chris@76: 		$db_cache[$db_count]['s'] = array_sum(explode(' ', $st)) - array_sum(explode(' ', $time_start));
Chris@76: 	}
Chris@76: 
Chris@76: 	// First, we clean strings out of the query, reduce whitespace, lowercase, and trim - so we can check it over.
Chris@76: 	if (empty($modSettings['disableQueryCheck']))
Chris@76: 	{
Chris@76: 		$clean = '';
Chris@76: 		$old_pos = 0;
Chris@76: 		$pos = -1;
Chris@76: 		while (true)
Chris@76: 		{
Chris@76: 			$pos = strpos($db_string, '\'', $pos + 1);
Chris@76: 			if ($pos === false)
Chris@76: 				break;
Chris@76: 			$clean .= substr($db_string, $old_pos, $pos - $old_pos);
Chris@76: 
Chris@76: 			while (true)
Chris@76: 			{
Chris@76: 				$pos1 = strpos($db_string, '\'', $pos + 1);
Chris@76: 				$pos2 = strpos($db_string, '\\', $pos + 1);
Chris@76: 				if ($pos1 === false)
Chris@76: 					break;
Chris@76: 				elseif ($pos2 == false || $pos2 > $pos1)
Chris@76: 				{
Chris@76: 					$pos = $pos1;
Chris@76: 					break;
Chris@76: 				}
Chris@76: 
Chris@76: 				$pos = $pos2 + 1;
Chris@76: 			}
Chris@76: 			$clean .= ' %s ';
Chris@76: 
Chris@76: 			$old_pos = $pos + 1;
Chris@76: 		}
Chris@76: 		$clean .= substr($db_string, $old_pos);
Chris@76: 		$clean = trim(strtolower(preg_replace($allowed_comments_from, $allowed_comments_to, $clean)));
Chris@76: 
Chris@76: 		// We don't use UNION in SMF, at least so far.  But it's useful for injections.
Chris@76: 		if (strpos($clean, 'union') !== false && preg_match('~(^|[^a-z])union($|[^[a-z])~s', $clean) != 0)
Chris@76: 			$fail = true;
Chris@76: 		// Comments?  We don't use comments in our queries, we leave 'em outside!
Chris@76: 		elseif (strpos($clean, '/*') > 2 || strpos($clean, '--') !== false || strpos($clean, ';') !== false)
Chris@76: 			$fail = true;
Chris@76: 		// Trying to change passwords, slow us down, or something?
Chris@76: 		elseif (strpos($clean, 'sleep') !== false && preg_match('~(^|[^a-z])sleep($|[^[_a-z])~s', $clean) != 0)
Chris@76: 			$fail = true;
Chris@76: 		elseif (strpos($clean, 'benchmark') !== false && preg_match('~(^|[^a-z])benchmark($|[^[a-z])~s', $clean) != 0)
Chris@76: 			$fail = true;
Chris@76: 		// Sub selects?  We don't use those either.
Chris@76: 		elseif (preg_match('~\([^)]*?select~s', $clean) != 0)
Chris@76: 			$fail = true;
Chris@76: 
Chris@76: 		if (!empty($fail) && function_exists('log_error'))
Chris@76: 			smf_db_error_backtrace('Hacking attempt...', 'Hacking attempt...' . "\n" . $db_string, E_USER_ERROR, __FILE__, __LINE__);
Chris@76: 	}
Chris@76: 
Chris@76: 	if (empty($db_unbuffered))
Chris@76: 		$ret = @mysql_query($db_string, $connection);
Chris@76: 	else
Chris@76: 		$ret = @mysql_unbuffered_query($db_string, $connection);
Chris@76: 	if ($ret === false && empty($db_values['db_error_skip']))
Chris@76: 		$ret = smf_db_error($db_string, $connection);
Chris@76: 
Chris@76: 	// Debugging.
Chris@76: 	if (isset($db_show_debug) && $db_show_debug === true)
Chris@76: 		$db_cache[$db_count]['t'] = array_sum(explode(' ', microtime())) - array_sum(explode(' ', $st));
Chris@76: 
Chris@76: 	return $ret;
Chris@76: }
Chris@76: 
Chris@76: function smf_db_affected_rows($connection = null)
Chris@76: {
Chris@76: 	global $db_connection;
Chris@76: 
Chris@76: 	return mysql_affected_rows($connection == null ? $db_connection : $connection);
Chris@76: }
Chris@76: 
Chris@76: function smf_db_insert_id($table, $field = null, $connection = null)
Chris@76: {
Chris@76: 	global $db_connection, $db_prefix;
Chris@76: 
Chris@76: 	$table = str_replace('{db_prefix}', $db_prefix, $table);
Chris@76: 
Chris@76: 	// MySQL doesn't need the table or field information.
Chris@76: 	return mysql_insert_id($connection == null ? $db_connection : $connection);
Chris@76: }
Chris@76: 
Chris@76: // Do a transaction.
Chris@76: function smf_db_transaction($type = 'commit', $connection = null)
Chris@76: {
Chris@76: 	global $db_connection;
Chris@76: 
Chris@76: 	// Decide which connection to use
Chris@76: 	$connection = $connection == null ? $db_connection : $connection;
Chris@76: 
Chris@76: 	if ($type == 'begin')
Chris@76: 		return @mysql_query('BEGIN', $connection);
Chris@76: 	elseif ($type == 'rollback')
Chris@76: 		return @mysql_query('ROLLBACK', $connection);
Chris@76: 	elseif ($type == 'commit')
Chris@76: 		return @mysql_query('COMMIT', $connection);
Chris@76: 
Chris@76: 	return false;
Chris@76: }
Chris@76: 
Chris@76: // Database error!
Chris@76: function smf_db_error($db_string, $connection = null)
Chris@76: {
Chris@76: 	global $txt, $context, $sourcedir, $webmaster_email, $modSettings;
Chris@76: 	global $forum_version, $db_connection, $db_last_error, $db_persist;
Chris@76: 	global $db_server, $db_user, $db_passwd, $db_name, $db_show_debug, $ssi_db_user, $ssi_db_passwd;
Chris@76: 	global $smcFunc;
Chris@76: 
Chris@76: 	// Get the file and line numbers.
Chris@76: 	list ($file, $line) = smf_db_error_backtrace('', '', 'return', __FILE__, __LINE__);
Chris@76: 
Chris@76: 	// Decide which connection to use
Chris@76: 	$connection = $connection == null ? $db_connection : $connection;
Chris@76: 
Chris@76: 	// This is the error message...
Chris@76: 	$query_error = mysql_error($connection);
Chris@76: 	$query_errno = mysql_errno($connection);
Chris@76: 
Chris@76: 	// Error numbers:
Chris@76: 	//    1016: Can't open file '....MYI'
Chris@76: 	//    1030: Got error ??? from table handler.
Chris@76: 	//    1034: Incorrect key file for table.
Chris@76: 	//    1035: Old key file for table.
Chris@76: 	//    1205: Lock wait timeout exceeded.
Chris@76: 	//    1213: Deadlock found.
Chris@76: 	//    2006: Server has gone away.
Chris@76: 	//    2013: Lost connection to server during query.
Chris@76: 
Chris@76: 	// Log the error.
Chris@76: 	if ($query_errno != 1213 && $query_errno != 1205 && function_exists('log_error'))
Chris@76: 		log_error($txt['database_error'] . ': ' . $query_error . (!empty($modSettings['enableErrorQueryLogging']) ? "\n\n$db_string" : ''), 'database', $file, $line);
Chris@76: 
Chris@76: 	// Database error auto fixing ;).
Chris@76: 	if (function_exists('cache_get_data') && (!isset($modSettings['autoFixDatabase']) || $modSettings['autoFixDatabase'] == '1'))
Chris@76: 	{
Chris@76: 		// Force caching on, just for the error checking.
Chris@76: 		$old_cache = @$modSettings['cache_enable'];
Chris@76: 		$modSettings['cache_enable'] = '1';
Chris@76: 
Chris@76: 		if (($temp = cache_get_data('db_last_error', 600)) !== null)
Chris@76: 			$db_last_error = max(@$db_last_error, $temp);
Chris@76: 
Chris@76: 		if (@$db_last_error < time() - 3600 * 24 * 3)
Chris@76: 		{
Chris@76: 			// We know there's a problem... but what?  Try to auto detect.
Chris@76: 			if ($query_errno == 1030 && strpos($query_error, ' 127 ') !== false)
Chris@76: 			{
Chris@76: 				preg_match_all('~(?:[\n\r]|^)[^\']+?(?:FROM|JOIN|UPDATE|TABLE) ((?:[^\n\r(]+?(?:, )?)*)~s', $db_string, $matches);
Chris@76: 
Chris@76: 				$fix_tables = array();
Chris@76: 				foreach ($matches[1] as $tables)
Chris@76: 				{
Chris@76: 					$tables = array_unique(explode(',', $tables));
Chris@76: 					foreach ($tables as $table)
Chris@76: 					{
Chris@76: 						// Now, it's still theoretically possible this could be an injection.  So backtick it!
Chris@76: 						if (trim($table) != '')
Chris@76: 							$fix_tables[] = '`' . strtr(trim($table), array('`' => '')) . '`';
Chris@76: 					}
Chris@76: 				}
Chris@76: 
Chris@76: 				$fix_tables = array_unique($fix_tables);
Chris@76: 			}
Chris@76: 			// Table crashed.  Let's try to fix it.
Chris@76: 			elseif ($query_errno == 1016)
Chris@76: 			{
Chris@76: 				if (preg_match('~\'([^\.\']+)~', $query_error, $match) != 0)
Chris@76: 					$fix_tables = array('`' . $match[1] . '`');
Chris@76: 			}
Chris@76: 			// Indexes crashed.  Should be easy to fix!
Chris@76: 			elseif ($query_errno == 1034 || $query_errno == 1035)
Chris@76: 			{
Chris@76: 				preg_match('~\'([^\']+?)\'~', $query_error, $match);
Chris@76: 				$fix_tables = array('`' . $match[1] . '`');
Chris@76: 			}
Chris@76: 		}
Chris@76: 
Chris@76: 		// Check for errors like 145... only fix it once every three days, and send an email. (can't use empty because it might not be set yet...)
Chris@76: 		if (!empty($fix_tables))
Chris@76: 		{
Chris@76: 			// Subs-Admin.php for updateSettingsFile(), Subs-Post.php for sendmail().
Chris@76: 			require_once($sourcedir . '/Subs-Admin.php');
Chris@76: 			require_once($sourcedir . '/Subs-Post.php');
Chris@76: 
Chris@76: 			// Make a note of the REPAIR...
Chris@76: 			cache_put_data('db_last_error', time(), 600);
Chris@76: 			if (($temp = cache_get_data('db_last_error', 600)) === null)
Chris@76: 				updateSettingsFile(array('db_last_error' => time()));
Chris@76: 
Chris@76: 			// Attempt to find and repair the broken table.
Chris@76: 			foreach ($fix_tables as $table)
Chris@76: 				$smcFunc['db_query']('', "
Chris@76: 					REPAIR TABLE $table", false, false);
Chris@76: 
Chris@76: 			// And send off an email!
Chris@76: 			sendmail($webmaster_email, $txt['database_error'], $txt['tried_to_repair']);
Chris@76: 
Chris@76: 			$modSettings['cache_enable'] = $old_cache;
Chris@76: 
Chris@76: 			// Try the query again...?
Chris@76: 			$ret = $smcFunc['db_query']('', $db_string, false, false);
Chris@76: 			if ($ret !== false)
Chris@76: 				return $ret;
Chris@76: 		}
Chris@76: 		else
Chris@76: 			$modSettings['cache_enable'] = $old_cache;
Chris@76: 
Chris@76: 		// Check for the "lost connection" or "deadlock found" errors - and try it just one more time.
Chris@76: 		if (in_array($query_errno, array(1205, 1213, 2006, 2013)))
Chris@76: 		{
Chris@76: 			if (in_array($query_errno, array(2006, 2013)) && $db_connection == $connection)
Chris@76: 			{
Chris@76: 				// Are we in SSI mode?  If so try that username and password first
Chris@76: 				if (SMF == 'SSI' && !empty($ssi_db_user) && !empty($ssi_db_passwd))
Chris@76: 				{
Chris@76: 					if (empty($db_persist))
Chris@76: 						$db_connection = @mysql_connect($db_server, $ssi_db_user, $ssi_db_passwd);
Chris@76: 					else
Chris@76: 						$db_connection = @mysql_pconnect($db_server, $ssi_db_user, $ssi_db_passwd);
Chris@76: 				}
Chris@76: 				// Fall back to the regular username and password if need be
Chris@76: 				if (!$db_connection)
Chris@76: 				{
Chris@76: 					if (empty($db_persist))
Chris@76: 						$db_connection = @mysql_connect($db_server, $db_user, $db_passwd);
Chris@76: 					else
Chris@76: 						$db_connection = @mysql_pconnect($db_server, $db_user, $db_passwd);
Chris@76: 				}
Chris@76: 
Chris@76: 				if (!$db_connection || !@mysql_select_db($db_name, $db_connection))
Chris@76: 					$db_connection = false;
Chris@76: 			}
Chris@76: 
Chris@76: 			if ($db_connection)
Chris@76: 			{
Chris@76: 				// Try a deadlock more than once more.
Chris@76: 				for ($n = 0; $n < 4; $n++)
Chris@76: 				{
Chris@76: 					$ret = $smcFunc['db_query']('', $db_string, false, false);
Chris@76: 
Chris@76: 					$new_errno = mysql_errno($db_connection);
Chris@76: 					if ($ret !== false || in_array($new_errno, array(1205, 1213)))
Chris@76: 						break;
Chris@76: 				}
Chris@76: 
Chris@76: 				// If it failed again, shucks to be you... we're not trying it over and over.
Chris@76: 				if ($ret !== false)
Chris@76: 					return $ret;
Chris@76: 			}
Chris@76: 		}
Chris@76: 		// Are they out of space, perhaps?
Chris@76: 		elseif ($query_errno == 1030 && (strpos($query_error, ' -1 ') !== false || strpos($query_error, ' 28 ') !== false || strpos($query_error, ' 12 ') !== false))
Chris@76: 		{
Chris@76: 			if (!isset($txt))
Chris@76: 				$query_error .= ' - check database storage space.';
Chris@76: 			else
Chris@76: 			{
Chris@76: 				if (!isset($txt['mysql_error_space']))
Chris@76: 					loadLanguage('Errors');
Chris@76: 
Chris@76: 				$query_error .= !isset($txt['mysql_error_space']) ? ' - check database storage space.' : $txt['mysql_error_space'];
Chris@76: 			}
Chris@76: 		}
Chris@76: 	}
Chris@76: 
Chris@76: 	// Nothing's defined yet... just die with it.
Chris@76: 	if (empty($context) || empty($txt))
Chris@76: 		die($query_error);
Chris@76: 
Chris@76: 	// Show an error message, if possible.
Chris@76: 	$context['error_title'] = $txt['database_error'];
Chris@76: 	if (allowedTo('admin_forum'))
Chris@76: 		$context['error_message'] = nl2br($query_error) . '<br />' . $txt['file'] . ': ' . $file . '<br />' . $txt['line'] . ': ' . $line;
Chris@76: 	else
Chris@76: 		$context['error_message'] = $txt['try_again'];
Chris@76: 
Chris@76: 	// A database error is often the sign of a database in need of upgrade.  Check forum versions, and if not identical suggest an upgrade... (not for Demo/CVS versions!)
Chris@76: 	if (allowedTo('admin_forum') && !empty($forum_version) && $forum_version != 'SMF ' . @$modSettings['smfVersion'] && strpos($forum_version, 'Demo') === false && strpos($forum_version, 'CVS') === false)
Chris@76: 		$context['error_message'] .= '<br /><br />' . sprintf($txt['database_error_versions'], $forum_version, $modSettings['smfVersion']);
Chris@76: 
Chris@76: 	if (allowedTo('admin_forum') && isset($db_show_debug) && $db_show_debug === true)
Chris@76: 	{
Chris@76: 		$context['error_message'] .= '<br /><br />' . nl2br($db_string);
Chris@76: 	}
Chris@76: 
Chris@76: 	// It's already been logged... don't log it again.
Chris@76: 	fatal_error($context['error_message'], false);
Chris@76: }
Chris@76: 
Chris@76: // Insert some data...
Chris@76: function smf_db_insert($method = 'replace', $table, $columns, $data, $keys, $disable_trans = false, $connection = null)
Chris@76: {
Chris@76: 	global $smcFunc, $db_connection, $db_prefix;
Chris@76: 
Chris@76: 	$connection = $connection === null ? $db_connection : $connection;
Chris@76: 
Chris@76: 	// With nothing to insert, simply return.
Chris@76: 	if (empty($data))
Chris@76: 		return;
Chris@76: 
Chris@76: 	// Replace the prefix holder with the actual prefix.
Chris@76: 	$table = str_replace('{db_prefix}', $db_prefix, $table);
Chris@76: 
Chris@76: 	// Inserting data as a single row can be done as a single array.
Chris@76: 	if (!is_array($data[array_rand($data)]))
Chris@76: 		$data = array($data);
Chris@76: 
Chris@76: 	// Create the mold for a single row insert.
Chris@76: 	$insertData = '(';
Chris@76: 	foreach ($columns as $columnName => $type)
Chris@76: 	{
Chris@76: 		// Are we restricting the length?
Chris@76: 		if (strpos($type, 'string-') !== false)
Chris@76: 			$insertData .= sprintf('SUBSTRING({string:%1$s}, 1, ' . substr($type, 7) . '), ', $columnName);
Chris@76: 		else
Chris@76: 			$insertData .= sprintf('{%1$s:%2$s}, ', $type, $columnName);
Chris@76: 	}
Chris@76: 	$insertData = substr($insertData, 0, -2) . ')';
Chris@76: 
Chris@76: 	// Create an array consisting of only the columns.
Chris@76: 	$indexed_columns = array_keys($columns);
Chris@76: 
Chris@76: 	// Here's where the variables are injected to the query.
Chris@76: 	$insertRows = array();
Chris@76: 	foreach ($data as $dataRow)
Chris@76: 		$insertRows[] = smf_db_quote($insertData, array_combine($indexed_columns, $dataRow), $connection);
Chris@76: 
Chris@76: 	// Determine the method of insertion.
Chris@76: 	$queryTitle = $method == 'replace' ? 'REPLACE' : ($method == 'ignore' ? 'INSERT IGNORE' : 'INSERT');
Chris@76: 
Chris@76: 	// Do the insert.
Chris@76: 	$smcFunc['db_query']('', '
Chris@76: 		' . $queryTitle . ' INTO ' . $table . '(`' . implode('`, `', $indexed_columns) . '`)
Chris@76: 		VALUES
Chris@76: 			' . implode(',
Chris@76: 			', $insertRows),
Chris@76: 		array(
Chris@76: 			'security_override' => true,
Chris@76: 			'db_error_skip' => $table === $db_prefix . 'log_errors',
Chris@76: 		),
Chris@76: 		$connection
Chris@76: 	);
Chris@76: }
Chris@76: 
Chris@76: // This function tries to work out additional error information from a back trace.
Chris@76: function smf_db_error_backtrace($error_message, $log_message = '', $error_type = false, $file = null, $line = null)
Chris@76: {
Chris@76: 	if (empty($log_message))
Chris@76: 		$log_message = $error_message;
Chris@76: 
Chris@76: 	if (function_exists('debug_backtrace'))
Chris@76: 	{
Chris@76: 		foreach (debug_backtrace() as $step)
Chris@76: 		{
Chris@76: 			// Found it?
Chris@76: 			if (strpos($step['function'], 'query') === false && !in_array(substr($step['function'], 0, 7), array('smf_db_', 'preg_re', 'db_erro', 'call_us')) && substr($step['function'], 0, 2) != '__')
Chris@76: 			{
Chris@76: 				$log_message .= '<br />Function: ' . $step['function'];
Chris@76: 				break;
Chris@76: 			}
Chris@76: 
Chris@76: 			if (isset($step['line']))
Chris@76: 			{
Chris@76: 				$file = $step['file'];
Chris@76: 				$line = $step['line'];
Chris@76: 			}
Chris@76: 		}
Chris@76: 	}
Chris@76: 
Chris@76: 	// A special case - we want the file and line numbers for debugging.
Chris@76: 	if ($error_type == 'return')
Chris@76: 		return array($file, $line);
Chris@76: 
Chris@76: 	// Is always a critical error.
Chris@76: 	if (function_exists('log_error'))
Chris@76: 		log_error($log_message, 'critical', $file, $line);
Chris@76: 
Chris@76: 	if (function_exists('fatal_error'))
Chris@76: 	{
Chris@76: 		fatal_error($error_message, false);
Chris@76: 
Chris@76: 		// Cannot continue...
Chris@76: 		exit;
Chris@76: 	}
Chris@76: 	elseif ($error_type)
Chris@76: 		trigger_error($error_message . ($line !== null ? '<em>(' . basename($file) . '-' . $line . ')</em>' : ''), $error_type);
Chris@76: 	else
Chris@76: 		trigger_error($error_message . ($line !== null ? '<em>(' . basename($file) . '-' . $line . ')</em>' : ''));
Chris@76: }
Chris@76: 
Chris@76: // Escape the LIKE wildcards so that they match the character and not the wildcard.
Chris@76: // The optional second parameter turns human readable wildcards into SQL wildcards.
Chris@76: function smf_db_escape_wildcard_string($string, $translate_human_wildcards=false)
Chris@76: {
Chris@76: 	$replacements = array(
Chris@76: 		'%' => '\%',
Chris@76: 		'_' => '\_',
Chris@76: 		'\\' => '\\\\',
Chris@76: 	);
Chris@76: 
Chris@76: 	if ($translate_human_wildcards)
Chris@76: 		$replacements += array(
Chris@76: 			'*' => '%',
Chris@76: 		);
Chris@76: 
Chris@76: 	return strtr($string, $replacements);
Chris@76: }
Chris@76: ?>