diff --git a/common/defaults/config.php b/common/defaults/config.php
index 20c3d7894..7550f7af4 100644
--- a/common/defaults/config.php
+++ b/common/defaults/config.php
@@ -5,3 +5,103 @@
  * 
  * Copyright (c) Rhymix Developers and Contributors
  */
+return array(
+	'config_version' => '2.0',
+	'db' => array(
+		'master' => array(
+			'type' => 'mysql',
+			'host' => 'localhost',
+			'port' => 3306,
+			'user' => null,
+			'pass' => null,
+			'database' => null,
+			'prefix' => null,
+			'charset' => null,
+			'engine' => null,
+		),
+	),
+	'cache' => array(),
+	'ftp' => array(
+		'host' => 'localhost',
+		'port' => 21,
+		'path' => null,
+		'user' => null,
+		'pass' => null,
+		'pasv' => true,
+		'sftp' => false,
+	),
+	'crypto' => array(
+		'encryption_key' => null,
+		'authentication_key' => null,
+		'session_key' => null,
+	),
+	'locale' => array(
+		'default_lang' => 'ko',
+		'enabled_lang' => array('ko'),
+		'default_timezone' => 'Asia/Seoul',
+		'internal_timezone' => 32400,
+	),
+	'url' => array(
+		'default' => null,
+		'http_port' => null,
+		'https_port' => null,
+		'ssl' => 'none',
+	),
+	'session' => array(
+		'delay' => false,
+		'use_db' => false,
+		'domain' => null,
+		'path' => null,
+		'lifetime' => 0,
+		'refresh' => 300,
+	),
+	'file' => array(
+		'umask' => '022',
+	),
+	'mail' => array(
+		'transport' => 'mail',
+		'smtp_host' => null,
+		'smtp_port' => null,
+		'smtp_security' => 'none',
+		'smtp_user' => null,
+		'smtp_pass' => null,
+		'api_domain' => null,
+		'api_token' => null,
+		'api_user' => null,
+		'api_pass' => null,
+	),
+	'view' => array(
+		'minify_scripts' => 'common',
+		'concat_scripts' => 'none',
+		'use_gzip' => false,
+	),
+	'admin' => array(
+		'allow' => array(),
+		'deny' => array(),
+	),
+	'lock' => array(
+		'locked' => false,
+		'title' => 'Maintenance',
+		'message' => '',
+		'allow' => array(),
+	),
+	'debug' => array(
+		'enabled' => true,
+		'log_errors' => true,
+		'log_queries' => false,
+		'log_slow_queries' => 1,
+		'log_slow_triggers' => 1,
+		'log_slow_widgets' => 1,
+		'display_type' => 'comment',
+		'display_to' => 'admin',
+		'allow' => array(),
+	),
+	'embedfilter' => array(
+		'iframe' => array(),
+		'object' => array(),
+	),
+	'use_mobile_view' => true,
+	'use_prepared_statements' => true,
+	'use_rewrite' => true,
+	'use_sso' => false,
+);
diff --git a/common/framework/config.php b/common/framework/config.php
new file mode 100644
index 000000000..aad54dc90
--- /dev/null
+++ b/common/framework/config.php
@@ -0,0 +1,358 @@
+<?php
+
+namespace Rhymix\Framework;
+
+/**
+ * The config class.
+ */
+class Config
+{
+	/**
+	 * System configuration is stored here.
+	 */
+	protected static $_config = array();
+	
+	/**
+	 * Load system configuration.
+	 * 
+	 * @return void
+	 */
+	public static function init()
+	{
+		if (file_exists(RX_BASEDIR . 'files/config/config.php'))
+		{
+			self::$_config = (include RX_BASEDIR . 'files/config/config.php');
+		}
+		else
+		{
+			self::$_config = self::convert();
+			self::save();
+		}
+	}
+	
+	/**
+	 * Get a system configuration value.
+	 * 
+	 * @param string $key
+	 * @return mixed
+	 */
+	public static function get($key)
+	{
+		if (!count(self::$_config))
+		{
+			self::init();
+		}
+		$data = &self::$_config;
+		$key = explode('.', $key);
+		foreach ($key as $step)
+		{
+			if (isset($data[$step]))
+			{
+				$data = &$data[$step];
+			}
+			else
+			{
+				return null;
+			}
+		}
+		return $data;
+	}
+	
+	/**
+	 * Set a system configuration value.
+	 * 
+	 * @param string $key
+	 * @param mixed $value
+	 * @return void
+	 */
+	public static function set($key, $value)
+	{
+		if (!count(self::$_config))
+		{
+			self::init();
+		}
+		$data = &self::$_config;
+		$key = explode('.', $key);
+		foreach ($key as $step)
+		{
+			$data = &$data[$step];
+		}
+		$data = $value;
+	}
+	
+	/**
+	 * Convert previous configuration files to the current format and return it.
+	 * 
+	 * @return array
+	 */
+	public static function convert()
+	{
+		// Load DB info file.
+		if (file_exists(RX_BASEDIR . 'files/config/db.config.php'))
+		{
+			include RX_BASEDIR . 'files/config/db.config.php';
+		}
+		else
+		{
+			return array();
+		}
+		
+		// Load FTP info file.
+		if (file_exists(RX_BASEDIR . 'files/config/ftp.config.php'))
+		{
+			include RX_BASEDIR . 'files/config/ftp.config.php';
+		}
+		
+		// Load selected language file.
+		if (file_exists(RX_BASEDIR . 'files/config/lang_selected.info'))
+		{
+			$lang_selected = array();
+			$lang_selected_raw = file_get_contents(RX_BASEDIR . 'files/config/lang_selected.info');
+			$lang_selected_raw = array_map('trim', explode("\n", $lang_selected_raw));
+			foreach ($lang_selected_raw as $lang_selected_item)
+			{
+				$lang_selected_item = array_map('trim', explode(',', $lang_selected_item));
+				if (count($lang_selected_item) && $lang_selected_item[0] !== '')
+				{
+					$lang_selected_item[0] = ($lang_selected_item[0] === 'jp' ? 'ja' : $lang_selected_item[0]);
+					$lang_selected[] = $lang_selected_item[0];
+				}
+			}
+			$lang_selected = array_unique($lang_selected);
+			unset($lang_selected_raw, $lang_selected_item);
+		}
+		else
+		{
+			$lang_selected = \Context::getLangType() === 'jp' ? 'ja' : \Context::getLangType();
+			$lang_selected = array($lang_selected);
+		}
+		
+		// Load defaults for the new configuration.
+		$config = (include RX_BASEDIR . 'common/defaults/config.php');
+		
+		// Convert database configuration.
+		if (!isset($db_info->master_db))
+		{
+			$db_info->master_db = array();
+			$db_info->master_db['db_type'] = $db_info->db_type;
+			$db_info->master_db['db_hostname'] = $db_info->db_hostname;
+			$db_info->master_db['db_port'] = $db_info->db_port;
+			$db_info->master_db['db_userid'] = $db_info->db_userid;
+			$db_info->master_db['db_password'] = $db_info->db_password;
+			$db_info->master_db['db_database'] = $db_info->db_database;
+			$db_info->master_db['db_table_prefix'] = $db_info->db_table_prefix;
+		}
+		
+		$config['db']['master']['type'] = strtolower($db_info->master_db['db_type']);
+		$config['db']['master']['host'] = $db_info->master_db['db_hostname'];
+		$config['db']['master']['port'] = $db_info->master_db['db_port'];
+		$config['db']['master']['user'] = $db_info->master_db['db_userid'];
+		$config['db']['master']['pass'] = $db_info->master_db['db_password'];
+		$config['db']['master']['database'] = $db_info->master_db['db_database'];
+		$config['db']['master']['prefix'] = $db_info->master_db['db_table_prefix'];
+		
+		if (substr($config['db']['master']['prefix'], -1) !== '_')
+		{
+			$config['db']['master']['prefix'] .= '_';
+		}
+		
+		$config['db']['master']['charset'] = $db_info->master_db['db_charset'] ?: 'utf8';
+		
+		if (strpos($config['db']['master']['type'], 'innodb') !== false)
+		{
+			$config['db']['master']['type'] = str_replace('_innodb', '', $config['db']['master']['type']);
+			$config['db']['master']['engine'] = 'innodb';
+		}
+		elseif (strpos($config['db']['master']['type'], 'mysql') !== false)
+		{
+			$config['db']['master']['engine'] = 'myisam';
+		}
+		
+		if (isset($db_info->slave_db) && count($db_info->slave_db))
+		{
+			foreach ($db_info->slave_db as $slave_id => $slave_db)
+			{
+				if ($slave_db !== $db_info->master_db)
+				{
+					$slave_id = 'slave' . $slave_id;
+					$config['db'][$slave_id]['type'] = strtolower($slave_db['db_type']);
+					$config['db'][$slave_id]['host'] = $slave_db['db_hostname'];
+					$config['db'][$slave_id]['port'] = $slave_db['db_type'];
+					$config['db'][$slave_id]['user'] = $slave_db['db_userid'];
+					$config['db'][$slave_id]['pass'] = $slave_db['db_password'];
+					$config['db'][$slave_id]['database'] = $slave_db['db_database'];
+					$config['db'][$slave_id]['prefix'] = $slave_db['db_table_prefix'];
+					
+					if (substr($config['db'][$slave_id]['prefix'], -1) !== '_')
+					{
+						$config['db'][$slave_id]['prefix'] .= '_';
+					}
+					
+					$config['db'][$slave_id]['charset'] = $slave_db['db_charset'] ?: 'utf8';
+					
+					if (strpos($config['db'][$slave_id]['type'], 'innodb') !== false)
+					{
+						$config['db'][$slave_id]['type'] = str_replace('_innodb', '', $config['db'][$slave_id]['type']);
+						$config['db'][$slave_id]['engine'] = 'innodb';
+					}
+					elseif (strpos($config['db'][$slave_id]['type'], 'mysql') !== false)
+					{
+						$config['db'][$slave_id]['engine'] = 'myisam';
+					}
+				}
+			}
+		}
+		
+		// Convert cache configuration.
+		if (isset($db_info->use_object_cache))
+		{
+			$config['cache'][] = $db_info->use_object_cache;
+		}
+		
+		// Convert FTP configuration.
+		if (isset($ftp_info))
+		{
+			$config['ftp']['host'] = $ftp_info->ftp_host;
+			$config['ftp']['port'] = $ftp_info->ftp_port;
+			$config['ftp']['path'] = $ftp_info->ftp_root_path;
+			$config['ftp']['user'] = $ftp_info->ftp_user;
+			$config['ftp']['pasv'] = $ftp_info->ftp_pasv;
+			$config['ftp']['sftp'] = $ftp_info->sftp === 'Y' ? true : false;
+		}
+		
+		// Create new crypto keys.
+		$config['crypto']['encryption_key'] = \Password::createSecureSalt(64, 'alnum');
+		$config['crypto']['authentication_key'] = \Password::createSecureSalt(64, 'alnum');
+		$config['crypto']['session_key'] = \Password::createSecureSalt(64, 'alnum');
+		
+		// Convert language configuration.
+		if (isset($db_info->lang_type))
+		{
+			$config['locale']['default_lang'] = str_replace('jp', 'ja', strtolower($db_info->lang_type));
+		}
+		elseif (count($lang_selected))
+		{
+			$config['locale']['default_lang'] = array_first($lang_selected);
+		}
+		$config['locale']['enabled_lang'] = array_values($lang_selected);
+		
+		// Convert timezone configuration.
+		$old_timezone = intval(get_time_zone_offset($db_info->time_zone ?: '+0900') / 3600);
+		switch ($old_timezone)
+		{
+			case 9:
+				$config['locale']['default_timezone'] = 'Asia/Seoul'; break;
+			case 0:
+				$config['locale']['default_timezone'] = 'Etc/UTC'; break;
+			default:
+				$config['locale']['default_timezone'] = 'Etc/GMT' . ($old_timezone > 0 ? '-' : '+') . abs($old_timezone);
+		}
+		$config['locale']['internal_timezone'] = intval(date('Z'));
+		
+		// Convert URL configuration.
+		$config['url']['default'] = $db_info->default_url ?: \RX_BASEURL;
+		$config['url']['http_port'] = $db_info->http_port ?: null;
+		$config['url']['https_port'] = $db_info->https_port ?: null;
+		$config['url']['ssl'] = $db_info->use_ssl ?: 'none';
+		
+		// Convert session configuration.
+		$config['session']['delay'] = $db_info->delay_session === 'Y' ? true : false;
+		$config['session']['use_db'] = $db_info->use_db_session === 'Y' ? true : false;
+		
+		// Convert view configuration.
+		$config['view']['minify_scripts'] = $db_info->minify_scripts ?: 'common';
+		$config['view']['use_gzip'] = (defined('__OB_GZHANDLER_ENABLE__') && constant('__OB_GZHANDLER_ENABLE__'));
+		
+		// Convert admin IP whitelist.
+		if (isset($db_info->admin_ip_list) && is_array($db_info->admin_ip_list) && count($db_info->admin_ip_list))
+		{
+			$config['admin']['allow'] = array_values($db_info->admin_ip_list);
+		}
+		
+		// Convert sitelock configuration.
+		$config['lock']['locked'] = $db_info->use_sitelock === 'Y' ? true : false;
+		$config['lock']['title'] = strval($db_info->sitelock_title);
+		$config['lock']['message'] = strval($db_info->sitelock_message);
+		$config['lock']['allow'] = is_array($db_info->sitelock_whitelist) ? array_values($db_info->sitelock_whitelist) : array();
+		
+		// Convert debug configuration.
+		$config['debug']['enabled'] = true;
+		$config['debug']['log_errors'] = true;
+		$config['debug']['log_queries'] = (\__DEBUG__ & 4) ? true : false;
+		$config['debug']['log_slow_queries'] = floatval(\__LOG_SLOW_QUERY__);
+		$config['debug']['log_slow_triggers'] = floatval(\__LOG_SLOW_TRIGGER__ * 1000);
+		$config['debug']['log_slow_widgets'] = floatval(\__LOG_SLOW_WIDGET__ * 1000);
+		
+		// Convert embed filter configuration.
+		if (is_array($db_info->embed_white_iframe))
+		{
+			$whitelist = array_unique(array_map(function($item) {
+				return preg_match('@^https?://(.*)$@i', $item, $matches) ? $matches[1] : $item;
+			}, $db_info->embed_white_iframe));
+			natcasesort($whitelist);
+			$config['embedfilter']['iframe'] = $whitelist;
+		}
+		if (is_array($db_info->embed_white_object))
+		{
+			$whitelist = array_unique(array_map(function($item) {
+				return preg_match('@^https?://(.*)$@i', $item, $matches) ? $matches[1] : $item;
+			}, $db_info->embed_white_object));
+			natcasesort($whitelist);
+			$config['embedfilter']['object'] = $whitelist;
+		}
+		
+		// Convert miscellaneous configuration.
+		$config['use_mobile_view'] = $db_info->use_mobile_view === 'Y' ? true : false;
+		$config['use_prepared_statements'] = $db_info->use_prepared_statements === 'Y' ? true : false;
+		$config['use_rewrite'] = $db_info->use_rewrite === 'Y' ? true : false;
+		$config['use_sso'] = $db_info->use_sso === 'Y' ? true : false;
+		
+		// Return the new configuration.
+		return $config;
+	}
+	
+	/**
+	 * Save the current system configuration.
+	 * 
+	 * @return bool
+	 */
+	public static function save()
+	{
+		if (!count(self::$_config))
+		{
+			self::init();
+		}
+		$buff = '<?php' . "\n" . '// Rhymix System Configuration' . "\n" . 'return ' . self::serialize(self::$_config) . ';' . "\n";
+		return \FileHandler::writeFile(RX_BASEDIR . 'files/config/config.php', $buff) ? true : false;
+	}
+	
+	/**
+	 * Serialize a value for insertion into a PHP-based configuration file.
+	 * 
+	 * @param mixed $value
+	 * @return string
+	 */
+	public static function serialize($value)
+	{
+		if (is_object($value))
+		{
+			return '(object)' . self::serializeValue((array)$value);
+		}
+		elseif (is_array($value))
+		{
+			$value = var_export($value, true);
+			$value = preg_replace('/array \(\n/', "array(\n", $value);
+			$value = preg_replace('/=>\s+array\(\n/', "=> array(\n", $value);
+			$value = preg_replace('/array\(\s*\n\s*\)/', 'array()', $value);
+			$value = preg_replace_callback('/\n(\x20+)/', function($m) {
+				return "\n" . str_repeat("\t", intval(strlen($m[1]) / 2));
+			}, $value);
+			$value = preg_replace('/\n(\t+)[0-9]+ => /', "\n\$1", $value);
+			return $value;
+		}
+		else
+		{
+			return var_export($value, true);
+		}
+	}
+}