diff --git a/.gitignore b/.gitignore
index 9624fcdd..cb24f4de 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,4 +6,4 @@ npm-debug.log
 .env
 /.settings
 .buildpath
-.project
+.project
\ No newline at end of file
diff --git a/config/database.php b/config/database.php
new file mode 100644
index 00000000..07fed63a
--- /dev/null
+++ b/config/database.php
@@ -0,0 +1,19 @@
+<?php
+
+return [
+
+    'mysql' => [
+        'host' => env('MYSQL_HOST', '127.0.0.1'),
+        'port' => env('MYSQL_PORT', 3306),
+        'username' => env('MYSQL_USERNAME', 'root'),
+        'password' => env('MYSQL_PASSWORD', ''),
+        'database' => env('MYSQL_DATABASE', 'nexusphp'),
+    ],
+
+    'redis' => [
+        'host' => env('REDIS_HOST', '127.0.0.1'),
+        'port' => env('REDIS_PORT', 6379),
+        'database' => env('REDIS_DATABASE', 0),
+    ],
+
+];
\ No newline at end of file
diff --git a/include/bittorrent.php b/include/bittorrent.php
index ce1393de..3ec0a03d 100644
--- a/include/bittorrent.php
+++ b/include/bittorrent.php
@@ -10,18 +10,5 @@ $showversion = " - Powered by ".PROJECTNAME;
 $rootpath=realpath(dirname(__FILE__) . '/..');
 set_include_path(get_include_path() . PATH_SEPARATOR . $rootpath);
 $rootpath .= "/";
-require $rootpath . 'include/config.php';
-require $rootpath . 'include/functions.php';
-require $rootpath . 'include/globalfunctions.php';
-require $rootpath . get_langfile_path("functions.php");
-
-require $rootpath . 'include/database/interface_db.php';
-require $rootpath . 'include/database/class_db_mysqli.php';
-require $rootpath . 'include/database/class_db.php';
-require $rootpath . 'include/database/helpers.php';
-require $rootpath . 'include/database/class_exception.php';
-
-require $rootpath . 'classes/class_advertisement.php';
-require $rootpath . 'classes/class_cache_redis.php';
 
 require $rootpath . 'include/core.php';
diff --git a/include/config.php b/include/config.php
index 60aba428..998c6d4a 100644
--- a/include/config.php
+++ b/include/config.php
@@ -5,27 +5,30 @@ die('Hacking attempt!');
 
 $CONFIGURATIONS = array('ACCOUNT', 'ADVERTISEMENT', 'ATTACHMENT', 'AUTHORITY', 'BASIC', 'BONUS', 'CODE', 'MAIN', 'SECURITY', 'SMTP', 'TORRENT', 'TWEAK');
 function ReadConfig ($configname = NULL) {
-//	static $allConfig;
-//	if (is_null($allConfig)) {
-//		$configs = config();
-//		foreach ($configs as $name => $value) {
-//			$prefix = strtoupper(strstr($name, '.', true));
-//			$pureName = substr($name, strpos($name, '.') + 1);
-//			$GLOBALS[$prefix][$pureName] = $value;
-//		}
-//	}
+	static $allConfig;
+
 	global $CONFIGURATIONS;
-	if ($configname) {
-		$configname = basename($configname);
-		$tmp = oldReadConfig($configname);
-		WriteConfig($configname, $tmp);
-		@unlink('./config/'.$configname);
-		return $tmp;
-	} else {
-		foreach ($CONFIGURATIONS as $CONFIGURATION) {
-			$GLOBALS[$CONFIGURATION] = ReadConfig($CONFIGURATION);
+
+	if (is_null($allConfig)) {
+		$configs = config();
+		foreach ($configs as $name => $value) {
+			$prefix = strtoupper(strstr($name, '.', true));
+			$pureName = substr($name, strpos($name, '.') + 1);
+			$GLOBALS[$prefix][$pureName] = $value;
 		}
 	}
+dd($GLOBALS);
+//	if ($configname) {
+//		$configname = basename($configname);
+//		$tmp = oldReadConfig($configname);
+//		WriteConfig($configname, $tmp);
+//		@unlink('./config/'.$configname);
+//		return $tmp;
+//	} else {
+//		foreach ($CONFIGURATIONS as $CONFIGURATION) {
+//			$GLOBALS[$CONFIGURATION] = ReadConfig($CONFIGURATION);
+//		}
+//	}
 }
 
 function oldReadConfig ($configname) {
@@ -62,12 +65,13 @@ function oldReadConfig ($configname) {
 	}
 }
 
+ReadConfig();
 
-if (file_exists('config/allconfig.php')) {
-	require('config/allconfig.php');
-} else {
-	ReadConfig();
-}
+//if (file_exists('config/allconfig.php')) {
+//	require('config/allconfig.php');
+//} else {
+//	ReadConfig();
+//}
 $SITENAME = $BASIC['SITENAME'];
 $BASEURL = $BASIC['BASEURL'];
 $announce_urls = array();
diff --git a/include/core.php b/include/core.php
index 637d317c..c45fe7cf 100644
--- a/include/core.php
+++ b/include/core.php
@@ -1,7 +1,24 @@
 <?php
 if(!defined('IN_TRACKER'))
   die('Hacking attempt!');
-error_reporting(E_ERROR | E_PARSE);
+error_reporting(E_ALL);
+
+require $rootpath . 'include/functions.php';
+require $rootpath . 'include/globalfunctions.php';
+
+require $rootpath . 'include/database/interface_db.php';
+require $rootpath . 'include/database/class_db_mysqli.php';
+require $rootpath . 'include/database/class_db.php';
+require $rootpath . 'include/database/helpers.php';
+require $rootpath . 'include/database/class_exception.php';
+
+require $rootpath . 'classes/class_advertisement.php';
+require $rootpath . 'classes/class_cache_redis.php';
+
+require $rootpath . 'include/config.php';
+require $rootpath . get_langfile_path("functions.php");
+
+
 ini_set('display_errors', $TWEAK['display_errors']);
 $Cache = new RedisCache(); //Load the caching class
 $Cache->setLanguageFolderArray(get_langfolder_list());
diff --git a/include/database/class_db.php b/include/database/class_db.php
index 5fe38444..bbe7d857 100644
--- a/include/database/class_db.php
+++ b/include/database/class_db.php
@@ -39,7 +39,9 @@ class DB
 
     public function connect($host, $username, $password, $database, $port)
     {
-        return $this->driver->connect($host, $username, $password, $database, $port);
+        if (is_null($this->driver)) {
+            $this->driver->connect($host, $username, $password, $database, $port);
+        }
     }
 
     public function query(string $sql)
@@ -108,6 +110,11 @@ class DB
         return $this->driver->freeResult($result);
     }
 
+    public function isConnected()
+    {
+        return !is_null($this->driver);
+    }
+
 
 
 
diff --git a/include/functions.php b/include/functions.php
index c5534a7b..403903bc 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -1717,6 +1717,9 @@ function getExportedValue($input,$t = null) {
 
 function dbconn($autoclean = false)
 {
+    if (DB::getInstance()->isConnected()) {
+        return;
+    }
 	global $lang_functions;
 	global $mysql_host, $mysql_user, $mysql_pass, $mysql_db;
 	global $useCronTriggerCleanUp;
@@ -1770,6 +1773,9 @@ function get_user_row($id)
 }
 
 function userlogin() {
+    if (isset($GLOBALS['CURUSER'])) {
+        return;
+    }
 	global $lang_functions;
 	global $Cache;
 	global $SITE_ONLINE, $oldip;
@@ -4427,7 +4433,6 @@ function do_log($log)
  *
  * @author xiaomlove
  * @date 2021/1/11
- * @time 10:42
  * @param null $name
  * @param null $prefix
  * @return mixed|string
@@ -4444,8 +4449,8 @@ function __($name = null, $prefix = null)
         $prefix = strstr($prefix, '.php', true);
     }
     if (is_null($i18n)) {
-        //get all in18 may be used, incldue user locale and default locale, and name = _target(because it is common) or prefixed with given prefix
-        $sql = "select locale, name, translation from i18n where locale in (" . sqlesc($userLocale) . ", " . sqlesc($defaultLocale) . ") and (name = '_target' or name like '{$prefix}%')";
+        //get all in18 may be used, incldue user locale and default locale, and name in('_target', 'functions') (because they are common) or prefixed with given prefix
+        $sql = "select locale, name, translation from i18n where locale in (" . sqlesc($userLocale) . ", " . sqlesc($defaultLocale) . ") and (name in ('_target', 'functions') or name like '{$prefix}%')";
         $result = sql_query($sql);
         while ($row = mysql_fetch_assoc($result)) {
             $i18n[$row['locale']][$row['name']] = $row['translation'];
@@ -4460,24 +4465,44 @@ function __($name = null, $prefix = null)
 
 }
 
+function config($key, $default = null)
+{
+    static $configs;
+    if (is_null($configs)) {
+        //get all configuration from config file
+        $files = glob($rootpath . 'config/*.php');
+        foreach ($files as $file) {
+            $basename = basename($file);
+            if ($basename != 'allconfig.php') {
+                continue;
+            }
+            $values = require $file;
+            $configPrefix = strstr($basename, '.php', true);
+            foreach ($values as $key => $value) {
+                $configs["$configPrefix.$key"] = $value;
+            }
+        }
+    }
+    return $configs[$key] ?? $default;
+}
+
 /**
- * get configuation for given name and prefix
+ * get setting for given name and prefix
  *
  * $name == null and $prefix == null, return all
  * $name == null and $prefix != null, return with specified prefix, but the result's prefix will be stripped
  *
  * @author xiaomlove
  * @date 2021/1/11
- * @time 16:37
  * @param null $name
  * @param null $prefix
  * @return array|mixed|string
  */
-function config($name = null, $prefix = null)
+function get_setting($name = null, $prefix = null)
 {
-    static $config;
-    if (is_null($config)) {
-        //get all configuations
+    static $settings;
+    if (is_null($settings)) {
+        //get all settings from database
         $sql = "select config_name, config_value from configs";
         $result = sql_query($sql);
         while ($row = mysql_fetch_assoc($result)) {
@@ -4486,20 +4511,21 @@ function config($name = null, $prefix = null)
             if (is_array($arr)) {
                 $value = $arr;
             }
-            $config[$row['config_name']] = $value;
+            $settings[$row['config_name']] = $value;
         }
+
     }
     if (!is_null($name)) {
         if (!is_null($prefix)) {
             $name = "$prefix.$name";
         }
-        return $config[$name] ?? '';
+        return $settings[$name] ?? null;
     }
     if (is_null($prefix)) {
-        return $config;
+        return $settings;
     }
     $filtered = [];
-    foreach ($config as $name => $value) {
+    foreach ($settings as $name => $value) {
         if (preg_match("/^$prefix/", $name)) {
             $nameWithoutPrefix = substr($name, strpos($name, '.') + 1);
             $filtered[$nameWithoutPrefix] = $value;
@@ -4509,4 +4535,52 @@ function config($name = null, $prefix = null)
 
 }
 
+function env($key, $default = null)
+{
+    static $env;
+    if (is_null($env)) {
+        $envFile = $rootpath . '.env';
+        if (!file_exists($envFile)) {
+            throw new \RuntimeException(".env file is not exists in the root path.");
+        }
+        $fp = fopen($envFile, 'r');
+        if ($fp === false) {
+            throw new \RuntimeException(".env file: $envFile is not readable.");
+        }
+        while ($line = trim(fgets($fp))) {
+            if (empty($line)) {
+                continue;
+            }
+            $pos = strpos($line, '=');
+            $key = normalize_env(mb_substr($line, 0, $pos, 'utf-8'));
+            $value = normalize_env(mb_substr($line, $pos + 1, null, 'utf-8'));
+            $env[$key] = $value;
+        }
+    }
+    return $env[$key] ?? $default;
+
+}
+
+function normalize_env($value)
+{
+    $value = trim($value);
+    $toStrip = ['\'', '"'];
+    if (in_array(mb_substr($value, 0, 1, 'utf-8'), $toStrip)) {
+        $value = mb_substr($value, 1, null, 'utf-8');
+    }
+    if (in_array(mb_substr($value, -1, 'utf-8'), $toStrip)) {
+        $value = mb_substr($value, 0, -1, 'utf-8');
+    }
+    switch (strtolower($value)) {
+        case 'true':
+            return true;
+        case 'false':
+            return false;
+        case 'null':
+            return null;
+        default:
+            return $value;
+    }
+}
+
 ?>