diff --git a/conf/config.php b/conf/config.php
index e8527bc..9b728f3 100644
--- a/conf/config.php
+++ b/conf/config.php
@@ -1,16 +1,23 @@
 <?php
+
+
+
+
+
+
+
 	// *******************************************
 	// *** Database configuration (important!) ***
 	// *******************************************
 
-	define('DB_TYPE', "mysql"); // or mysql
-	define('DB_HOST', "localhost");
-	define('DB_USER', "__DB_NAME__");
-	define('DB_NAME', "__DB_NAME__");
-	define('DB_PASS', "__DB_PWD__");
-	define('DB_PORT', '3306'); // usually 5432 for PostgreSQL, 3306 for MySQL
+	putenv('TTRSS_DB_TYPE', "mysql"); // or mysql
+	putenv('TTRSS_DB_HOST', "localhost");
+	putenv('TTRSS_DB_USER', "__DB_NAME__");
+	putenv('TTRSS_DB_NAME', "__DB_NAME__");
+	putenv('TTRSS_DB_PASS', "__DB_PWD__");
+	putenv('TTRSS_DB_PORT', '3306'); // usually 5432 for PostgreSQL, 3306 for MySQL
 
-	define('MYSQL_CHARSET', 'UTF8');
+	putenv('TTRSS_MYSQL_CHARSET', 'UTF8');
 	// Connection charset for MySQL. If you have a legacy database and/or experience
 	// garbage unicode characters with this option, try setting it to a blank string.
 
@@ -18,61 +25,12 @@
 	// *** Basic settings (important!) ***
 	// ***********************************
 
-	define('SELF_URL_PATH', '__DOMAIN_PATH__');
+	putenv('TTRSS_SELF_URL_PATH', '__DOMAIN_PATH__');
 	// Full URL of your tt-rss installation. This should be set to the
 	// location of tt-rss directory, e.g. http://example.org/tt-rss/
 	// You need to set this option correctly otherwise several features
 	// including PUSH, bookmarklets and browser integration will not work properly.
 
-	define('FEED_CRYPT_KEY', '');
-	// WARNING: mcrypt is deprecated in php 7.1. This directive exists for backwards
-	// compatibility with existing installs, new passwords are NOT going to be encrypted.
-	// Use update.php --decrypt-feeds to decrypt existing passwords in the database while
-	// mcrypt is still available.
-
-	// Key used for encryption of passwords for password-protected feeds
-	// in the database. A string of 24 random characters. If left blank, encryption
-	// is not used. Requires mcrypt functions.
-	// Warning: changing this key will make your stored feed passwords impossible
-	// to decrypt.
-	
-	define('SINGLE_USER_MODE', false);
-	// Operate in single user mode, disables all functionality related to
-	// multiple users and authentication. Enabling this assumes you have
-	// your tt-rss directory protected by other means (e.g. http auth).
-
-	define('SIMPLE_UPDATE_MODE', false);
-	// Enables fallback update mode where tt-rss tries to update feeds in
-	// background while tt-rss is open in your browser. 
-	// If you don't have a lot of feeds and don't want to or can't run 
-	// background processes while not running tt-rss, this method is generally 
-	// viable to keep your feeds up to date.
-	// Still, there are more robust (and recommended) updating methods 
-	// available, you can read about them here: http://tt-rss.org/wiki/UpdatingFeeds
-
-	// *****************************
-	// *** Files and directories ***
-	// *****************************
-
-	define('PHP_EXECUTABLE', '/usr/bin/php');
-	// Path to PHP *COMMAND LINE* executable, used for various command-line tt-rss 
-	// programs and update daemon. Do not try to use CGI binary here, it won't work. 
-	// If you see HTTP headers being displayed while running tt-rss scripts, 
-	// then most probably you are using the CGI binary. If you are unsure what to 
-	// put in here, ask your hosting provider.
-
-	define('LOCK_DIRECTORY', 'lock');
-	// Directory for lockfiles, must be writable to the user you run
-	// daemon process or cronjobs under.
-
-	define('CACHE_DIR', 'cache');
-	// Local cache directory for RSS feed content.
-
-	define('ICONS_DIR', "feed-icons");
-	define('ICONS_URL', "feed-icons");
-	// Local and URL path to the directory, where feed favicons are stored.
-	// Unless you really know what you're doing, please keep those relative
-	// to tt-rss main directory.
 
 	// **********************
 	// *** Authentication ***
@@ -80,61 +38,31 @@
 
 	// Please see PLUGINS below to configure various authentication modules.
 
-	define('AUTH_AUTO_CREATE', true);
+	putenv('TTRSS_AUTH_AUTO_CREATE', true);
 	// Allow authentication modules to auto-create users in tt-rss internal
 	// database when authenticated successfully.
 
-	define('AUTH_AUTO_LOGIN', true);
+	putenv('TTRSS_AUTH_AUTO_LOGIN', true);
 	// Automatically login user on remote or other kind of externally supplied
 	// authentication, otherwise redirect to login form as normal.
 	// If set to true, users won't be able to set application language
 	// and settings profile.
 
-	// *********************
-	// *** Feed settings ***
-	// *********************
-
-	define('FORCE_ARTICLE_PURGE', 0);
-	// When this option is not 0, users ability to control feed purging
-	// intervals is disabled and all articles (which are not starred) 
-	// older than this amount of days are purged.
-
-	// *** PubSubHubbub settings ***
-
-	define('PUBSUBHUBBUB_HUB', '');
-	// URL to a PubSubHubbub-compatible hub server. If defined, "Published
-	// articles" generated feed would automatically become PUSH-enabled.
-
-	define('PUBSUBHUBBUB_ENABLED', false);
-	// Enable client PubSubHubbub support in tt-rss. When disabled, tt-rss
-	// won't try to subscribe to PUSH feed updates.
-
-	// ****************************
-	// *** Sphinx search plugin ***
-	// ****************************
-
-	define('SPHINX_SERVER', 'localhost:9312');
-	// Hostname:port combination for the Sphinx server.
-
-	define('SPHINX_INDEX', 'ttrss, delta');
-	// Index name in Sphinx configuration. You can specify multiple indexes
-	// as a comma-separated string.
-	// Example configuration files are available on tt-rss wiki.
 
 	// ***********************************
 	// *** Self-registrations by users ***
 	// ***********************************
 
-	define('ENABLE_REGISTRATION', false);
+	putenv('TTRSS_ENABLE_REGISTRATION', false);
 	// Allow users to register themselves. Please be aware that allowing
 	// random people to access your tt-rss installation is a security risk
 	// and potentially might lead to data loss or server exploit. Disabled
 	// by default.
 
-	define('REG_NOTIFY_ADDRESS', 'user@your.domain.dom');
+	putenv('TTRSS_REG_NOTIFY_ADDRESS', 'user@your.domain.dom');
 	// Email address to send new user notifications to.
 
-	define('REG_MAX_USERS', 10);
+	putenv('TTRSS_REG_MAX_USERS', 10);
 	// Maximum amount of users which will be allowed to register on this
 	// system. 0 - no limit.
 
@@ -142,66 +70,8 @@
 	// *** Cookies and login sessions ***
 	// **********************************
 	
-	define('SESSION_COOKIE_LIFETIME', 86400);
+	define('TTRSS_SESSION_COOKIE_LIFETIME', 86400);
 	// Default lifetime of a session (e.g. login) cookie. In seconds, 
 	// 0 means cookie will be deleted when browser closes.
 
-	// *********************************
-	// *** Email and digest settings ***
-	// *********************************
 
-	define('SMTP_FROM_NAME', 'Tiny Tiny RSS');
-	define('SMTP_FROM_ADDRESS', 'noreply@your.domain.dom');
-	// Name, address and subject for sending outgoing mail. This applies
-	// to password reset notifications, digest emails and any other mail.
-
-	define('DIGEST_SUBJECT', '[tt-rss] New headlines for last 24 hours');
-	// Subject line for email digests
-
-	define('SMTP_SERVER', '');
-	// Hostname:port combination to send outgoing mail (i.e. localhost:25). 
-	// Blank - use system MTA.
-	
-	define('SMTP_LOGIN', '');
-	define('SMTP_PASSWORD', '');
-	// These two options enable SMTP authentication when sending
-	// outgoing mail. Only used with SMTP_SERVER.
-
-	define('SMTP_SECURE', '');
-	// Used to select a secure SMTP connection. Allowed values: ssl, tls,
-	// or empty.
-	
-	// ***************************************
-	// *** Other settings (less important) ***
-	// ***************************************
-
-	define('CHECK_FOR_UPDATES', true);
-	// Check for updates automatically if running Git version
- 
-	define('ENABLE_GZIP_OUTPUT', false);
-	// Selectively gzip output to improve wire performance. This requires
-	// PHP Zlib extension on the server.
-	// Enabling this can break tt-rss in several httpd/php configurations,
-	// if you experience weird errors and tt-rss failing to start, blank pages
-	// after login, or content encoding errors, disable it.
-
-	define('PLUGINS', 'auth_remote, auth_internal, note');
-	// Comma-separated list of plugins to load automatically for all users.
-	// System plugins have to be specified here. Please enable at least one
-	// authentication plugin here (auth_*).
-	// Users may enable other user plugins from Preferences/Plugins but may not
-	// disable plugins specified in this list.
-	// Disabling auth_internal in this list would automatically disable
-	// reset password link on the login form.
-	
-	define('LOG_DESTINATION', 'sql');
-	// Log destination to use. Possible values: sql (uses internal logging
-	// you can read in Preferences -> System), syslog - logs to system log.
-	// Setting this to blank uses PHP logging (usually to http server 
-	// error.log).
-
-	define('CONFIG_VERSION', 26);
-	// Expected config version. Please update this option in config.php
-	// if necessary (after migrating all new options from this file).
-
-	// vim:ft=php