--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/forum/Sources/Subs-Db-mysql.php	Sun Jul 07 11:25:48 2013 +0200
@@ -0,0 +1,709 @@
+<?php
+
+/**
+ * Simple Machines Forum (SMF)
+ *
+ * @package SMF
+ * @author Simple Machines http://www.simplemachines.org
+ * @copyright 2011 Simple Machines
+ * @license http://www.simplemachines.org/about/smf/license.php BSD
+ *
+ * @version 2.0.4
+ */
+
+if (!defined('SMF'))
+	die('Hacking attempt...');
+
+/*	This file has all the main functions in it that relate to the database.
+
+	smf_db_initiate() maps the implementations in this file (smf_db_function_name)
+	to the $smcFunc['db_function_name'] variable.
+
+*/
+
+// Initialize the database settings
+function smf_db_initiate($db_server, $db_name, $db_user, $db_passwd, $db_prefix, $db_options = array())
+{
+	global $smcFunc, $mysql_set_mode;
+
+	// Map some database specific functions, only do this once.
+	if (!isset($smcFunc['db_fetch_assoc']) || $smcFunc['db_fetch_assoc'] != 'mysql_fetch_assoc')
+		$smcFunc += array(
+			'db_query' => 'smf_db_query',
+			'db_quote' => 'smf_db_quote',
+			'db_fetch_assoc' => 'mysql_fetch_assoc',
+			'db_fetch_row' => 'mysql_fetch_row',
+			'db_free_result' => 'mysql_free_result',
+			'db_insert' => 'smf_db_insert',
+			'db_insert_id' => 'smf_db_insert_id',
+			'db_num_rows' => 'mysql_num_rows',
+			'db_data_seek' => 'mysql_data_seek',
+			'db_num_fields' => 'mysql_num_fields',
+			'db_escape_string' => 'addslashes',
+			'db_unescape_string' => 'stripslashes',
+			'db_server_info' => 'mysql_get_server_info',
+			'db_affected_rows' => 'smf_db_affected_rows',
+			'db_transaction' => 'smf_db_transaction',
+			'db_error' => 'mysql_error',
+			'db_select_db' => 'mysql_select_db',
+			'db_title' => 'MySQL',
+			'db_sybase' => false,
+			'db_case_sensitive' => false,
+			'db_escape_wildcard_string' => 'smf_db_escape_wildcard_string',
+		);
+
+	if (!empty($db_options['persist']))
+		$connection = @mysql_pconnect($db_server, $db_user, $db_passwd);
+	else
+		$connection = @mysql_connect($db_server, $db_user, $db_passwd);
+
+	// Something's wrong, show an error if its fatal (which we assume it is)
+	if (!$connection)
+	{
+		if (!empty($db_options['non_fatal']))
+			return null;
+		else
+			db_fatal_error();
+	}
+
+	// Select the database, unless told not to
+	if (empty($db_options['dont_select_db']) && !@mysql_select_db($db_name, $connection) && empty($db_options['non_fatal']))
+		db_fatal_error();
+
+	// This makes it possible to have SMF automatically change the sql_mode and autocommit if needed.
+	if (isset($mysql_set_mode) && $mysql_set_mode === true)
+		$smcFunc['db_query']('', 'SET sql_mode = \'\', AUTOCOMMIT = 1',
+		array(),
+		false
+	);
+
+	return $connection;
+}
+
+// Extend the database functionality.
+function db_extend($type = 'extra')
+{
+	global $sourcedir, $db_type;
+
+	require_once($sourcedir . '/Db' . strtoupper($type[0]) . substr($type, 1) . '-' . $db_type . '.php');
+	$initFunc = 'db_' . $type . '_init';
+	$initFunc();
+}
+
+// Fix up the prefix so it doesn't require the database to be selected.
+function db_fix_prefix(&$db_prefix, $db_name)
+{
+	$db_prefix = is_numeric(substr($db_prefix, 0, 1)) ? $db_name . '.' . $db_prefix : '`' . $db_name . '`.' . $db_prefix;
+}
+
+function smf_db_replacement__callback($matches)
+{
+	global $db_callback, $user_info, $db_prefix;
+
+	list ($values, $connection) = $db_callback;
+
+	if (!is_resource($connection))
+		db_fatal_error();
+
+	if ($matches[1] === 'db_prefix')
+		return $db_prefix;
+
+	if ($matches[1] === 'query_see_board')
+		return $user_info['query_see_board'];
+
+	if ($matches[1] === 'query_wanna_see_board')
+		return $user_info['query_wanna_see_board'];
+
+	if (!isset($matches[2]))
+		smf_db_error_backtrace('Invalid value inserted or no type specified.', '', E_USER_ERROR, __FILE__, __LINE__);
+
+	if (!isset($values[$matches[2]]))
+		smf_db_error_backtrace('The database value you\'re trying to insert does not exist: ' . htmlspecialchars($matches[2]), '', E_USER_ERROR, __FILE__, __LINE__);
+
+	$replacement = $values[$matches[2]];
+
+	switch ($matches[1])
+	{
+		case 'int':
+			if (!is_numeric($replacement) || (string) $replacement !== (string) (int) $replacement)
+				smf_db_error_backtrace('Wrong value type sent to the database. Integer expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
+			return (string) (int) $replacement;
+		break;
+
+		case 'string':
+		case 'text':
+			return sprintf('\'%1$s\'', mysql_real_escape_string($replacement, $connection));
+		break;
+
+		case 'array_int':
+			if (is_array($replacement))
+			{
+				if (empty($replacement))
+					smf_db_error_backtrace('Database error, given array of integer values is empty. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
+
+				foreach ($replacement as $key => $value)
+				{
+					if (!is_numeric($value) || (string) $value !== (string) (int) $value)
+						smf_db_error_backtrace('Wrong value type sent to the database. Array of integers expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
+
+					$replacement[$key] = (string) (int) $value;
+				}
+
+				return implode(', ', $replacement);
+			}
+			else
+				smf_db_error_backtrace('Wrong value type sent to the database. Array of integers expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
+
+		break;
+
+		case 'array_string':
+			if (is_array($replacement))
+			{
+				if (empty($replacement))
+					smf_db_error_backtrace('Database error, given array of string values is empty. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
+
+				foreach ($replacement as $key => $value)
+					$replacement[$key] = sprintf('\'%1$s\'', mysql_real_escape_string($value, $connection));
+
+				return implode(', ', $replacement);
+			}
+			else
+				smf_db_error_backtrace('Wrong value type sent to the database. Array of strings expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
+		break;
+
+		case 'date':
+			if (preg_match('~^(\d{4})-([0-1]?\d)-([0-3]?\d)$~', $replacement, $date_matches) === 1)
+				return sprintf('\'%04d-%02d-%02d\'', $date_matches[1], $date_matches[2], $date_matches[3]);
+			else
+				smf_db_error_backtrace('Wrong value type sent to the database. Date expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
+		break;
+
+		case 'float':
+			if (!is_numeric($replacement))
+				smf_db_error_backtrace('Wrong value type sent to the database. Floating point number expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
+			return (string) (float) $replacement;
+		break;
+
+		case 'identifier':
+			// Backticks inside identifiers are supported as of MySQL 4.1. We don't need them for SMF.
+			return '`' . strtr($replacement, array('`' => '', '.' => '')) . '`';
+		break;
+
+		case 'raw':
+			return $replacement;
+		break;
+
+		default:
+			smf_db_error_backtrace('Undefined type used in the database query. (' . $matches[1] . ':' . $matches[2] . ')', '', false, __FILE__, __LINE__);
+		break;
+	}
+}
+
+// Just like the db_query, escape and quote a string, but not executing the query.
+function smf_db_quote($db_string, $db_values, $connection = null)
+{
+	global $db_callback, $db_connection;
+
+	// Only bother if there's something to replace.
+	if (strpos($db_string, '{') !== false)
+	{
+		// This is needed by the callback function.
+		$db_callback = array($db_values, $connection == null ? $db_connection : $connection);
+
+		// Do the quoting and escaping
+		$db_string = preg_replace_callback('~{([a-z_]+)(?::([a-zA-Z0-9_-]+))?}~', 'smf_db_replacement__callback', $db_string);
+
+		// Clear this global variable.
+		$db_callback = array();
+	}
+
+	return $db_string;
+}
+
+// Do a query.  Takes care of errors too.
+function smf_db_query($identifier, $db_string, $db_values = array(), $connection = null)
+{
+	global $db_cache, $db_count, $db_connection, $db_show_debug, $time_start;
+	global $db_unbuffered, $db_callback, $modSettings;
+
+	// Comments that are allowed in a query are preg_removed.
+	static $allowed_comments_from = array(
+		'~\s+~s',
+		'~/\*!40001 SQL_NO_CACHE \*/~',
+		'~/\*!40000 USE INDEX \([A-Za-z\_]+?\) \*/~',
+		'~/\*!40100 ON DUPLICATE KEY UPDATE id_msg = \d+ \*/~',
+	);
+	static $allowed_comments_to = array(
+		' ',
+		'',
+		'',
+		'',
+	);
+
+	// Decide which connection to use.
+	$connection = $connection == null ? $db_connection : $connection;
+
+	// One more query....
+	$db_count = !isset($db_count) ? 1 : $db_count + 1;
+
+	if (empty($modSettings['disableQueryCheck']) && strpos($db_string, '\'') !== false && empty($db_values['security_override']))
+		smf_db_error_backtrace('Hacking attempt...', 'Illegal character (\') used in query...', true, __FILE__, __LINE__);
+
+	// Use "ORDER BY null" to prevent Mysql doing filesorts for Group By clauses without an Order By
+	if (strpos($db_string, 'GROUP BY') !== false && strpos($db_string, 'ORDER BY') === false && strpos($db_string, 'INSERT INTO') === false)
+	{
+		// Add before LIMIT
+		if ($pos = strpos($db_string, 'LIMIT '))
+			$db_string = substr($db_string, 0, $pos) . "\t\t\tORDER BY null\n" . substr($db_string, $pos, strlen($db_string));
+		else
+			// Append it.
+			$db_string .= "\n\t\t\tORDER BY null";
+	}
+
+	if (empty($db_values['security_override']) && (!empty($db_values) || strpos($db_string, '{db_prefix}') !== false))
+	{
+		// Pass some values to the global space for use in the callback function.
+		$db_callback = array($db_values, $connection);
+
+		// Inject the values passed to this function.
+		$db_string = preg_replace_callback('~{([a-z_]+)(?::([a-zA-Z0-9_-]+))?}~', 'smf_db_replacement__callback', $db_string);
+
+		// This shouldn't be residing in global space any longer.
+		$db_callback = array();
+	}
+
+	// Debugging.
+	if (isset($db_show_debug) && $db_show_debug === true)
+	{
+		// Get the file and line number this function was called.
+		list ($file, $line) = smf_db_error_backtrace('', '', 'return', __FILE__, __LINE__);
+
+		// Initialize $db_cache if not already initialized.
+		if (!isset($db_cache))
+			$db_cache = array();
+
+		if (!empty($_SESSION['debug_redirect']))
+		{
+			$db_cache = array_merge($_SESSION['debug_redirect'], $db_cache);
+			$db_count = count($db_cache) + 1;
+			$_SESSION['debug_redirect'] = array();
+		}
+
+		$st = microtime();
+		// Don't overload it.
+		$db_cache[$db_count]['q'] = $db_count < 50 ? $db_string : '...';
+		$db_cache[$db_count]['f'] = $file;
+		$db_cache[$db_count]['l'] = $line;
+		$db_cache[$db_count]['s'] = array_sum(explode(' ', $st)) - array_sum(explode(' ', $time_start));
+	}
+
+	// First, we clean strings out of the query, reduce whitespace, lowercase, and trim - so we can check it over.
+	if (empty($modSettings['disableQueryCheck']))
+	{
+		$clean = '';
+		$old_pos = 0;
+		$pos = -1;
+		while (true)
+		{
+			$pos = strpos($db_string, '\'', $pos + 1);
+			if ($pos === false)
+				break;
+			$clean .= substr($db_string, $old_pos, $pos - $old_pos);
+
+			while (true)
+			{
+				$pos1 = strpos($db_string, '\'', $pos + 1);
+				$pos2 = strpos($db_string, '\\', $pos + 1);
+				if ($pos1 === false)
+					break;
+				elseif ($pos2 == false || $pos2 > $pos1)
+				{
+					$pos = $pos1;
+					break;
+				}
+
+				$pos = $pos2 + 1;
+			}
+			$clean .= ' %s ';
+
+			$old_pos = $pos + 1;
+		}
+		$clean .= substr($db_string, $old_pos);
+		$clean = trim(strtolower(preg_replace($allowed_comments_from, $allowed_comments_to, $clean)));
+
+		// We don't use UNION in SMF, at least so far.  But it's useful for injections.
+		if (strpos($clean, 'union') !== false && preg_match('~(^|[^a-z])union($|[^[a-z])~s', $clean) != 0)
+			$fail = true;
+		// Comments?  We don't use comments in our queries, we leave 'em outside!
+		elseif (strpos($clean, '/*') > 2 || strpos($clean, '--') !== false || strpos($clean, ';') !== false)
+			$fail = true;
+		// Trying to change passwords, slow us down, or something?
+		elseif (strpos($clean, 'sleep') !== false && preg_match('~(^|[^a-z])sleep($|[^[_a-z])~s', $clean) != 0)
+			$fail = true;
+		elseif (strpos($clean, 'benchmark') !== false && preg_match('~(^|[^a-z])benchmark($|[^[a-z])~s', $clean) != 0)
+			$fail = true;
+		// Sub selects?  We don't use those either.
+		elseif (preg_match('~\([^)]*?select~s', $clean) != 0)
+			$fail = true;
+
+		if (!empty($fail) && function_exists('log_error'))
+			smf_db_error_backtrace('Hacking attempt...', 'Hacking attempt...' . "\n" . $db_string, E_USER_ERROR, __FILE__, __LINE__);
+	}
+
+	if (empty($db_unbuffered))
+		$ret = @mysql_query($db_string, $connection);
+	else
+		$ret = @mysql_unbuffered_query($db_string, $connection);
+	if ($ret === false && empty($db_values['db_error_skip']))
+		$ret = smf_db_error($db_string, $connection);
+
+	// Debugging.
+	if (isset($db_show_debug) && $db_show_debug === true)
+		$db_cache[$db_count]['t'] = array_sum(explode(' ', microtime())) - array_sum(explode(' ', $st));
+
+	return $ret;
+}
+
+function smf_db_affected_rows($connection = null)
+{
+	global $db_connection;
+
+	return mysql_affected_rows($connection == null ? $db_connection : $connection);
+}
+
+function smf_db_insert_id($table, $field = null, $connection = null)
+{
+	global $db_connection, $db_prefix;
+
+	$table = str_replace('{db_prefix}', $db_prefix, $table);
+
+	// MySQL doesn't need the table or field information.
+	return mysql_insert_id($connection == null ? $db_connection : $connection);
+}
+
+// Do a transaction.
+function smf_db_transaction($type = 'commit', $connection = null)
+{
+	global $db_connection;
+
+	// Decide which connection to use
+	$connection = $connection == null ? $db_connection : $connection;
+
+	if ($type == 'begin')
+		return @mysql_query('BEGIN', $connection);
+	elseif ($type == 'rollback')
+		return @mysql_query('ROLLBACK', $connection);
+	elseif ($type == 'commit')
+		return @mysql_query('COMMIT', $connection);
+
+	return false;
+}
+
+// Database error!
+function smf_db_error($db_string, $connection = null)
+{
+	global $txt, $context, $sourcedir, $webmaster_email, $modSettings;
+	global $forum_version, $db_connection, $db_last_error, $db_persist;
+	global $db_server, $db_user, $db_passwd, $db_name, $db_show_debug, $ssi_db_user, $ssi_db_passwd;
+	global $smcFunc;
+
+	// Get the file and line numbers.
+	list ($file, $line) = smf_db_error_backtrace('', '', 'return', __FILE__, __LINE__);
+
+	// Decide which connection to use
+	$connection = $connection == null ? $db_connection : $connection;
+
+	// This is the error message...
+	$query_error = mysql_error($connection);
+	$query_errno = mysql_errno($connection);
+
+	// Error numbers:
+	//    1016: Can't open file '....MYI'
+	//    1030: Got error ??? from table handler.
+	//    1034: Incorrect key file for table.
+	//    1035: Old key file for table.
+	//    1205: Lock wait timeout exceeded.
+	//    1213: Deadlock found.
+	//    2006: Server has gone away.
+	//    2013: Lost connection to server during query.
+
+	// Log the error.
+	if ($query_errno != 1213 && $query_errno != 1205 && function_exists('log_error'))
+		log_error($txt['database_error'] . ': ' . $query_error . (!empty($modSettings['enableErrorQueryLogging']) ? "\n\n$db_string" : ''), 'database', $file, $line);
+
+	// Database error auto fixing ;).
+	if (function_exists('cache_get_data') && (!isset($modSettings['autoFixDatabase']) || $modSettings['autoFixDatabase'] == '1'))
+	{
+		// Force caching on, just for the error checking.
+		$old_cache = @$modSettings['cache_enable'];
+		$modSettings['cache_enable'] = '1';
+
+		if (($temp = cache_get_data('db_last_error', 600)) !== null)
+			$db_last_error = max(@$db_last_error, $temp);
+
+		if (@$db_last_error < time() - 3600 * 24 * 3)
+		{
+			// We know there's a problem... but what?  Try to auto detect.
+			if ($query_errno == 1030 && strpos($query_error, ' 127 ') !== false)
+			{
+				preg_match_all('~(?:[\n\r]|^)[^\']+?(?:FROM|JOIN|UPDATE|TABLE) ((?:[^\n\r(]+?(?:, )?)*)~s', $db_string, $matches);
+
+				$fix_tables = array();
+				foreach ($matches[1] as $tables)
+				{
+					$tables = array_unique(explode(',', $tables));
+					foreach ($tables as $table)
+					{
+						// Now, it's still theoretically possible this could be an injection.  So backtick it!
+						if (trim($table) != '')
+							$fix_tables[] = '`' . strtr(trim($table), array('`' => '')) . '`';
+					}
+				}
+
+				$fix_tables = array_unique($fix_tables);
+			}
+			// Table crashed.  Let's try to fix it.
+			elseif ($query_errno == 1016)
+			{
+				if (preg_match('~\'([^\.\']+)~', $query_error, $match) != 0)
+					$fix_tables = array('`' . $match[1] . '`');
+			}
+			// Indexes crashed.  Should be easy to fix!
+			elseif ($query_errno == 1034 || $query_errno == 1035)
+			{
+				preg_match('~\'([^\']+?)\'~', $query_error, $match);
+				$fix_tables = array('`' . $match[1] . '`');
+			}
+		}
+
+		// Check for errors like 145... only fix it once every three days, and send an email. (can't use empty because it might not be set yet...)
+		if (!empty($fix_tables))
+		{
+			// Subs-Admin.php for updateSettingsFile(), Subs-Post.php for sendmail().
+			require_once($sourcedir . '/Subs-Admin.php');
+			require_once($sourcedir . '/Subs-Post.php');
+
+			// Make a note of the REPAIR...
+			cache_put_data('db_last_error', time(), 600);
+			if (($temp = cache_get_data('db_last_error', 600)) === null)
+				updateSettingsFile(array('db_last_error' => time()));
+
+			// Attempt to find and repair the broken table.
+			foreach ($fix_tables as $table)
+				$smcFunc['db_query']('', "
+					REPAIR TABLE $table", false, false);
+
+			// And send off an email!
+			sendmail($webmaster_email, $txt['database_error'], $txt['tried_to_repair']);
+
+			$modSettings['cache_enable'] = $old_cache;
+
+			// Try the query again...?
+			$ret = $smcFunc['db_query']('', $db_string, false, false);
+			if ($ret !== false)
+				return $ret;
+		}
+		else
+			$modSettings['cache_enable'] = $old_cache;
+
+		// Check for the "lost connection" or "deadlock found" errors - and try it just one more time.
+		if (in_array($query_errno, array(1205, 1213, 2006, 2013)))
+		{
+			if (in_array($query_errno, array(2006, 2013)) && $db_connection == $connection)
+			{
+				// Are we in SSI mode?  If so try that username and password first
+				if (SMF == 'SSI' && !empty($ssi_db_user) && !empty($ssi_db_passwd))
+				{
+					if (empty($db_persist))
+						$db_connection = @mysql_connect($db_server, $ssi_db_user, $ssi_db_passwd);
+					else
+						$db_connection = @mysql_pconnect($db_server, $ssi_db_user, $ssi_db_passwd);
+				}
+				// Fall back to the regular username and password if need be
+				if (!$db_connection)
+				{
+					if (empty($db_persist))
+						$db_connection = @mysql_connect($db_server, $db_user, $db_passwd);
+					else
+						$db_connection = @mysql_pconnect($db_server, $db_user, $db_passwd);
+				}
+
+				if (!$db_connection || !@mysql_select_db($db_name, $db_connection))
+					$db_connection = false;
+			}
+
+			if ($db_connection)
+			{
+				// Try a deadlock more than once more.
+				for ($n = 0; $n < 4; $n++)
+				{
+					$ret = $smcFunc['db_query']('', $db_string, false, false);
+
+					$new_errno = mysql_errno($db_connection);
+					if ($ret !== false || in_array($new_errno, array(1205, 1213)))
+						break;
+				}
+
+				// If it failed again, shucks to be you... we're not trying it over and over.
+				if ($ret !== false)
+					return $ret;
+			}
+		}
+		// Are they out of space, perhaps?
+		elseif ($query_errno == 1030 && (strpos($query_error, ' -1 ') !== false || strpos($query_error, ' 28 ') !== false || strpos($query_error, ' 12 ') !== false))
+		{
+			if (!isset($txt))
+				$query_error .= ' - check database storage space.';
+			else
+			{
+				if (!isset($txt['mysql_error_space']))
+					loadLanguage('Errors');
+
+				$query_error .= !isset($txt['mysql_error_space']) ? ' - check database storage space.' : $txt['mysql_error_space'];
+			}
+		}
+	}
+
+	// Nothing's defined yet... just die with it.
+	if (empty($context) || empty($txt))
+		die($query_error);
+
+	// Show an error message, if possible.
+	$context['error_title'] = $txt['database_error'];
+	if (allowedTo('admin_forum'))
+		$context['error_message'] = nl2br($query_error) . '<br />' . $txt['file'] . ': ' . $file . '<br />' . $txt['line'] . ': ' . $line;
+	else
+		$context['error_message'] = $txt['try_again'];
+
+	// A database error is often the sign of a database in need of upgrade.  Check forum versions, and if not identical suggest an upgrade... (not for Demo/CVS versions!)
+	if (allowedTo('admin_forum') && !empty($forum_version) && $forum_version != 'SMF ' . @$modSettings['smfVersion'] && strpos($forum_version, 'Demo') === false && strpos($forum_version, 'CVS') === false)
+		$context['error_message'] .= '<br /><br />' . sprintf($txt['database_error_versions'], $forum_version, $modSettings['smfVersion']);
+
+	if (allowedTo('admin_forum') && isset($db_show_debug) && $db_show_debug === true)
+	{
+		$context['error_message'] .= '<br /><br />' . nl2br($db_string);
+	}
+
+	// It's already been logged... don't log it again.
+	fatal_error($context['error_message'], false);
+}
+
+// Insert some data...
+function smf_db_insert($method = 'replace', $table, $columns, $data, $keys, $disable_trans = false, $connection = null)
+{
+	global $smcFunc, $db_connection, $db_prefix;
+
+	$connection = $connection === null ? $db_connection : $connection;
+
+	// With nothing to insert, simply return.
+	if (empty($data))
+		return;
+
+	// Replace the prefix holder with the actual prefix.
+	$table = str_replace('{db_prefix}', $db_prefix, $table);
+
+	// Inserting data as a single row can be done as a single array.
+	if (!is_array($data[array_rand($data)]))
+		$data = array($data);
+
+	// Create the mold for a single row insert.
+	$insertData = '(';
+	foreach ($columns as $columnName => $type)
+	{
+		// Are we restricting the length?
+		if (strpos($type, 'string-') !== false)
+			$insertData .= sprintf('SUBSTRING({string:%1$s}, 1, ' . substr($type, 7) . '), ', $columnName);
+		else
+			$insertData .= sprintf('{%1$s:%2$s}, ', $type, $columnName);
+	}
+	$insertData = substr($insertData, 0, -2) . ')';
+
+	// Create an array consisting of only the columns.
+	$indexed_columns = array_keys($columns);
+
+	// Here's where the variables are injected to the query.
+	$insertRows = array();
+	foreach ($data as $dataRow)
+		$insertRows[] = smf_db_quote($insertData, array_combine($indexed_columns, $dataRow), $connection);
+
+	// Determine the method of insertion.
+	$queryTitle = $method == 'replace' ? 'REPLACE' : ($method == 'ignore' ? 'INSERT IGNORE' : 'INSERT');
+
+	// Do the insert.
+	$smcFunc['db_query']('', '
+		' . $queryTitle . ' INTO ' . $table . '(`' . implode('`, `', $indexed_columns) . '`)
+		VALUES
+			' . implode(',
+			', $insertRows),
+		array(
+			'security_override' => true,
+			'db_error_skip' => $table === $db_prefix . 'log_errors',
+		),
+		$connection
+	);
+}
+
+// This function tries to work out additional error information from a back trace.
+function smf_db_error_backtrace($error_message, $log_message = '', $error_type = false, $file = null, $line = null)
+{
+	if (empty($log_message))
+		$log_message = $error_message;
+
+	if (function_exists('debug_backtrace'))
+	{
+		foreach (debug_backtrace() as $step)
+		{
+			// Found it?
+			if (strpos($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) != '__')
+			{
+				$log_message .= '<br />Function: ' . $step['function'];
+				break;
+			}
+
+			if (isset($step['line']))
+			{
+				$file = $step['file'];
+				$line = $step['line'];
+			}
+		}
+	}
+
+	// A special case - we want the file and line numbers for debugging.
+	if ($error_type == 'return')
+		return array($file, $line);
+
+	// Is always a critical error.
+	if (function_exists('log_error'))
+		log_error($log_message, 'critical', $file, $line);
+
+	if (function_exists('fatal_error'))
+	{
+		fatal_error($error_message, false);
+
+		// Cannot continue...
+		exit;
+	}
+	elseif ($error_type)
+		trigger_error($error_message . ($line !== null ? '<em>(' . basename($file) . '-' . $line . ')</em>' : ''), $error_type);
+	else
+		trigger_error($error_message . ($line !== null ? '<em>(' . basename($file) . '-' . $line . ')</em>' : ''));
+}
+
+// Escape the LIKE wildcards so that they match the character and not the wildcard.
+// The optional second parameter turns human readable wildcards into SQL wildcards.
+function smf_db_escape_wildcard_string($string, $translate_human_wildcards=false)
+{
+	$replacements = array(
+		'%' => '\%',
+		'_' => '\_',
+		'\\' => '\\\\',
+	);
+
+	if ($translate_human_wildcards)
+		$replacements += array(
+			'*' => '%',
+		);
+
+	return strtr($string, $replacements);
+}
+?>
\ No newline at end of file