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* @version $Id: functions_install.php,v 1.17 2007/11/19 16:43:59 acydburn Exp $
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* @copyright (c) 2006 phpBB Group
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* @license http://opensource.org/licenses/gpl-license.php GNU Public License
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if (!defined('IN_PHPBB'))
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* Determine if we are able to load a specified PHP module and do so if possible
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function can_load_dll($dll)
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return ((@ini_get('enable_dl') || strtolower(@ini_get('enable_dl')) == 'on') && (!@ini_get('safe_mode') || strtolower(@ini_get('safe_mode')) == 'off') && @dl($dll . '.' . PHP_SHLIB_SUFFIX)) ? true : false;
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* Returns an array of available DBMS with some data, if a DBMS is specified it will only
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* return data for that DBMS and will load its extension if necessary.
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function get_available_dbms($dbms = false, $return_unavailable = false, $only_20x_options = false)
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$available_dbms = array(
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'LABEL' => 'FireBird',
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'SCHEMA' => 'firebird',
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'MODULE' => 'interbase',
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'COMMENTS' => 'remove_remarks',
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'DRIVER' => 'firebird',
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'LABEL' => 'MySQL with MySQLi Extension',
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'SCHEMA' => 'mysql_41',
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'COMMENTS' => 'remove_remarks',
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'COMMENTS' => 'remove_remarks',
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'LABEL' => 'MS SQL Server 2000+',
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'COMMENTS' => 'remove_comments',
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'LABEL' => 'MS SQL Server [ ODBC ]',
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'COMMENTS' => 'remove_comments',
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'DRIVER' => 'mssql_odbc',
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'COMMENTS' => 'remove_comments',
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'LABEL' => 'PostgreSQL 7.x/8.x',
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'SCHEMA' => 'postgres',
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'COMMENTS' => 'remove_comments',
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'DRIVER' => 'postgres',
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'SCHEMA' => 'sqlite',
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'MODULE' => 'sqlite',
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'COMMENTS' => 'remove_remarks',
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'DRIVER' => 'sqlite',
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if (isset($available_dbms[$dbms]))
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$available_dbms = array($dbms => $available_dbms[$dbms]);
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// now perform some checks whether they are really available
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foreach ($available_dbms as $db_name => $db_ary)
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if ($only_20x_options && !$db_ary['2.0.x'])
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if ($return_unavailable)
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$available_dbms[$db_name]['AVAILABLE'] = false;
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unset($available_dbms[$db_name]);
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$dll = $db_ary['MODULE'];
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if (!@extension_loaded($dll))
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if (!can_load_dll($dll))
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if ($return_unavailable)
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$available_dbms[$db_name]['AVAILABLE'] = false;
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unset($available_dbms[$db_name]);
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$any_db_support = true;
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if ($return_unavailable)
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$available_dbms['ANY_DB_SUPPORT'] = $any_db_support;
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return $available_dbms;
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* Generate the drop down of available database options
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function dbms_select($default = '', $only_20x_options = false)
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$available_dbms = get_available_dbms(false, false, $only_20x_options);
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foreach ($available_dbms as $dbms_name => $details)
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$selected = ($dbms_name == $default) ? ' selected="selected"' : '';
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$dbms_options .= '<option value="' . $dbms_name . '"' . $selected .'>' . $lang['DLL_' . strtoupper($dbms_name)] . '</option>';
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return $dbms_options;
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* Get tables of a database
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function get_tables($db)
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switch ($db->sql_layer)
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$sql = 'SHOW TABLES';
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WHERE type = "table"';
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$sql = 'SELECT relname
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FROM pg_stat_user_tables';
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$sql = 'SELECT rdb$relation_name
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WHERE rdb$view_source is null
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AND rdb$system_flag = 0';
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$sql = 'SELECT table_name
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$result = $db->sql_query($sql);
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while ($row = $db->sql_fetchrow($result))
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$tables[] = current($row);
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$db->sql_freeresult($result);
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* Used to test whether we are able to connect to the database the user has specified
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* and identify any problems (eg there are already tables with the names we want to use
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* @param array $dbms should be of the format of an element of the array returned by {@link get_available_dbms get_available_dbms()}
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* necessary extensions should be loaded already
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function connect_check_db($error_connect, &$error, $dbms_details, $table_prefix, $dbhost, $dbuser, $dbpasswd, $dbname, $dbport, $prefix_may_exist = false, $load_dbal = true, $unicode_check = true)
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global $phpbb_root_path, $phpEx, $config, $lang;
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$dbms = $dbms_details['DRIVER'];
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// Include the DB layer
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include($phpbb_root_path . 'includes/db/' . $dbms . '.' . $phpEx);
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// Instantiate it and set return on error true
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$sql_db = 'dbal_' . $dbms;
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$db->sql_return_on_error(true);
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// Check that we actually have a database name before going any further.....
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if ($dbms_details['DRIVER'] != 'sqlite' && $dbms_details['DRIVER'] != 'oracle' && $dbname === '')
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$error[] = $lang['INST_ERR_DB_NO_NAME'];
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// Make sure we don't have a daft user who thinks having the SQLite database in the forum directory is a good idea
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if ($dbms_details['DRIVER'] == 'sqlite' && stripos(phpbb_realpath($dbhost), phpbb_realpath('../')) === 0)
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$error[] = $lang['INST_ERR_DB_FORUM_PATH'];
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// Check the prefix length to ensure that index names are not too long and does not contain invalid characters
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switch ($dbms_details['DRIVER'])
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if (strpos($table_prefix, '-') !== false || strpos($table_prefix, '.') !== false)
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$error[] = $lang['INST_ERR_PREFIX_INVALID'];
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$prefix_length = 200;
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if (strlen($table_prefix) > $prefix_length)
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$error[] = sprintf($lang['INST_ERR_PREFIX_TOO_LONG'], $prefix_length);
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// Try and connect ...
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if (is_array($db->sql_connect($dbhost, $dbuser, $dbpasswd, $dbname, $dbport, false, true)))
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$db_error = $db->sql_error();
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$error[] = $lang['INST_ERR_DB_CONNECT'] . '<br />' . (($db_error['message']) ? $db_error['message'] : $lang['INST_ERR_DB_NO_ERROR']);
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// Likely matches for an existing phpBB installation
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if (!$prefix_may_exist)
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$temp_prefix = strtolower($table_prefix);
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$table_ary = array($temp_prefix . 'attachments', $temp_prefix . 'config', $temp_prefix . 'sessions', $temp_prefix . 'topics', $temp_prefix . 'users');
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$tables = get_tables($db);
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$tables = array_map('strtolower', $tables);
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$table_intersect = array_intersect($tables, $table_ary);
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if (sizeof($table_intersect))
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$error[] = $lang['INST_ERR_PREFIX'];
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// Make sure that the user has selected a sensible DBAL for the DBMS actually installed
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switch ($dbms_details['DRIVER'])
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if (version_compare(mysqli_get_server_info($db->db_connect_id), '4.1.3', '<'))
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$error[] = $lang['INST_ERR_DB_NO_MYSQLI'];
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if (version_compare(sqlite_libversion(), '2.8.2', '<'))
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$error[] = $lang['INST_ERR_DB_NO_SQLITE'];
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// check the version of FB, use some hackery if we can't get access to the server info
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if ($db->service_handle !== false && function_exists('ibase_server_info'))
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$val = @ibase_server_info($db->service_handle, IBASE_SVC_SERVER_VERSION);
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preg_match('#V([\d.]+)#', $val, $match);
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$error[] = $lang['INST_ERR_DB_NO_FIREBIRD'];
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$db_info = @ibase_db_info($db->service_handle, $dbname, IBASE_STS_HDR_PAGES);
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preg_match('/^\\s*Page size\\s*(\\d+)/m', $db_info, $regs);
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$page_size = intval($regs[1]);
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if ($page_size < 8192)
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$error[] = $lang['INST_ERR_DB_NO_FIREBIRD_PS'];
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WHERE RDB$SYSTEM_FLAG IS NULL
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AND RDB$FUNCTION_NAME = 'CHAR_LENGTH'";
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$result = $db->sql_query($sql);
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$row = $db->sql_fetchrow($result);
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$db->sql_freeresult($result);
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// if its a UDF, its too old
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$error[] = $lang['INST_ERR_DB_NO_FIREBIRD'];
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$sql = "SELECT FIRST 0 char_length('')
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$result = $db->sql_query($sql);
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if (!$result) // This can only fail if char_length is not defined
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$error[] = $lang['INST_ERR_DB_NO_FIREBIRD'];
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$db->sql_freeresult($result);
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// Setup the stuff for our random table
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$char_array = array_merge(range('A', 'Z'), range('0', '9'));
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$char_len = mt_rand(7, 9);
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$char_array_len = sizeof($char_array) - 1;
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for ($i = 0; $i < $char_len; $i++)
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$final .= $char_array[mt_rand(0, $char_array_len)];
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// Create some random table
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$sql = 'CREATE TABLE ' . $final . " (
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FIELD1 VARCHAR(255) CHARACTER SET UTF8 DEFAULT '' NOT NULL COLLATE UNICODE,
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FIELD2 INTEGER DEFAULT 0 NOT NULL);";
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$db->sql_query($sql);
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// Create an index that should fail if the page size is less than 8192
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$sql = 'CREATE INDEX ' . $final . ' ON ' . $final . '(FIELD1, FIELD2);';
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$db->sql_query($sql);
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if (ibase_errmsg() !== false)
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$error[] = $lang['INST_ERR_DB_NO_FIREBIRD_PS'];
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// Kill the old table
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$db->sql_query('DROP TABLE ' . $final . ';');
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FROM NLS_DATABASE_PARAMETERS
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WHERE PARAMETER = 'NLS_RDBMS_VERSION'
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OR PARAMETER = 'NLS_CHARACTERSET'";
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$result = $db->sql_query($sql);
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while ($row = $db->sql_fetchrow($result))
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$stats[$row['parameter']] = $row['value'];
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$db->sql_freeresult($result);
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if (version_compare($stats['NLS_RDBMS_VERSION'], '9.2', '<') && $stats['NLS_CHARACTERSET'] !== 'UTF8')
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$error[] = $lang['INST_ERR_DB_NO_ORACLE'];
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$sql = "SHOW server_encoding;";
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$result = $db->sql_query($sql);
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$row = $db->sql_fetchrow($result);
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$db->sql_freeresult($result);
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if ($row['server_encoding'] !== 'UNICODE' && $row['server_encoding'] !== 'UTF8')
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$error[] = $lang['INST_ERR_DB_NO_POSTGRES'];
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if ($error_connect && (!isset($error) || !sizeof($error)))
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* remove_remarks will strip the sql comment lines out of an uploaded sql file
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function remove_remarks(&$sql)
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$sql = preg_replace('/\n{2,}/', "\n", preg_replace('/^#.*$/m', "\n", $sql));
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* split_sql_file will split an uploaded sql file into single sql statements.
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* Note: expects trim() to have already been run on $sql.
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function split_sql_file($sql, $delimiter)
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$sql = str_replace("\r" , '', $sql);
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$data = preg_split('/' . preg_quote($delimiter, '/') . '$/m', $sql);
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$data = array_map('trim', $data);
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$end_data = end($data);
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if (empty($end_data))
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unset($data[key($data)]);
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* For replacing {L_*} strings with preg_replace_callback
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function adjust_language_keys_callback($matches)
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if (!empty($matches[1]))
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return (!empty($lang[$matches[1]])) ? $db->sql_escape($lang[$matches[1]]) : $db->sql_escape($matches[1]);
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www/php/phpBB3/includes/functions_install.php
