diff --git a/.github/workflows/test_mysql.yml b/.github/workflows/test_mysql.yml
index 4078a8b5..a53aab33 100644
--- a/.github/workflows/test_mysql.yml
+++ b/.github/workflows/test_mysql.yml
@@ -55,9 +55,12 @@ jobs:
       - name: Install dependencies
         run: COMPOSER_MEMORY_LIMIT=-1 composer install --prefer-dist --no-interaction
 
-      - name: Run test cases
+      - name: Run acceptance test cases
         run: sh ./test_sh
 
+      - name: Run integration test cases
+        run: php _vendor/bin/codecept run integration
+
       - name: Output logs
         if: failure()
         run: cat _cache/test/*.log && cat _tests/_output/email/*.txt
diff --git a/.github/workflows/test_postgres.yml b/.github/workflows/test_postgres.yml
index 158d088a..13ca7fb6 100644
--- a/.github/workflows/test_postgres.yml
+++ b/.github/workflows/test_postgres.yml
@@ -40,9 +40,12 @@ jobs:
       - name: Install dependencies
         run: COMPOSER_MEMORY_LIMIT=-1 composer install --prefer-dist --no-interaction
 
-      - name: Run test cases
+      - name: Run acceptance test cases
         run: sh ./test_sh
 
+      - name: Run integration test cases
+        run: php _vendor/bin/codecept run integration
+
       - name: Output logs
         if: failure()
         run: cat _cache/test/*.log && cat _tests/_output/email/*.txt
diff --git a/.github/workflows/test_sqlite.yml b/.github/workflows/test_sqlite.yml
index 88172661..c6fe9ad1 100644
--- a/.github/workflows/test_sqlite.yml
+++ b/.github/workflows/test_sqlite.yml
@@ -32,9 +32,12 @@ jobs:
       - name: Install dependencies
         run: COMPOSER_MEMORY_LIMIT=-1 composer install --prefer-dist --no-interaction
 
-      - name: Run test cases
+      - name: Run acceptance test cases
         run: sh ./test_sh
 
+      - name: Run integration test cases
+        run: php _vendor/bin/codecept run integration
+
       - name: Output logs
         if: failure()
         run: cat _cache/test/*.log && cat _tests/_output/email/*.txt
diff --git a/_admin/extensions.php b/_admin/extensions.php
index 27349059..c68dbe69 100644
--- a/_admin/extensions.php
+++ b/_admin/extensions.php
@@ -10,6 +10,7 @@
  */
 
 
+use S2\Cms\Model\ExtensionCache;
 use S2\Cms\Pdo\DbLayer;
 
 if (!defined('S2_ROOT'))
@@ -359,10 +360,11 @@ function s2_install_extension ($id)
 		}
 	}
 
-
 	// Regenerate the hooks cache
-	S2Cache::clear();
-	S2Cache::generate_hooks();
+    /** @var ExtensionCache $cache */
+    $cache = \Container::get(ExtensionCache::class);
+    $cache->clear(); // TODO also clear DynamicConfigProvider cache
+	$cache->generateHooks();
 
 	return $messages;
 }
@@ -458,9 +460,11 @@ function s2_flip_extension ($id)
 	$s2_db->buildAndQuery($query);
 
 
-	// Regenerate the hooks cache
-	S2Cache::clear();
-	S2Cache::generate_hooks();
+    // Regenerate the hooks cache
+    /** @var ExtensionCache $cache */
+    $cache = \Container::get(ExtensionCache::class);
+    $cache->clear(); // TODO also clear DynamicConfigProvider cache
+    $cache->generateHooks();
 
 	($hook = s2_hook('fn_flip_extension_end')) ? eval($hook) : null;
 
@@ -539,9 +543,11 @@ function s2_uninstall_extension ($id)
 	$s2_db->buildAndQuery($query);
 
 
-	// Regenerate the hooks cache
-	S2Cache::clear();
-	S2Cache::generate_hooks();
+    // Regenerate the hooks cache
+    /** @var ExtensionCache $cache */
+    $cache = \Container::get(ExtensionCache::class);
+    $cache->clear(); // TODO also clear DynamicConfigProvider cache
+    $cache->generateHooks();
 
 	($hook = s2_hook('fn_uninstall_extension_end')) ? eval($hook) : null;
 
diff --git a/_admin/info.php b/_admin/info.php
index 2f1118dd..f4d8baa7 100644
--- a/_admin/info.php
+++ b/_admin/info.php
@@ -114,7 +114,7 @@ function s2_stat_info ()
 
 	$version = array(
 		'<a href="http://s2cms.ru/" target="_blank">S2 '.S2_VERSION.' &uarr;</a>',
-		'© 2007–2023 Roman Parpalak',
+		'© 2007–2024 Roman Parpalak',
 	);
 
 	$environment = array(
diff --git a/_admin/install.php b/_admin/install.php
index 0a02960e..13f810a0 100644
--- a/_admin/install.php
+++ b/_admin/install.php
@@ -14,6 +14,7 @@
 use S2\Cms\CmsExtension;
 use S2\Cms\Framework\Application;
 use S2\Cms\Logger\Logger;
+use S2\Cms\Model\ExtensionCache;
 use S2\Cms\Pdo\DbLayer;
 use S2\Cms\Pdo\DbLayerException;
 use Symfony\Component\ErrorHandler\Debug;
@@ -68,7 +69,7 @@ function generate_config_file ()
 	foreach (array('', '/?', '/index.php', '/index.php?') as $prefix) {
 		$url_prefix = $prefix;
 		$content = s2_get_remote_file($base_url.$url_prefix.'/this/URL/_DoEs_/_NoT_/_eXiSt', 1, false, 10, true);
-		if ($content !== null && false !== strpos($content['content'], '<meta name="Generator" content="S2 '.S2_VERSION.'" />')) {
+		if ($content !== null && str_contains($content['content'], '<meta name="Generator" content="S2" />')) {
             break;
         }
 	}
@@ -76,13 +77,14 @@ function generate_config_file ()
 	$path = preg_replace('#^[^:/]+://[^/]*#', '', $base_url);
 
 	$use_https = false;
-	if (substr($base_url, 0, 8) == 'https://')
-		$use_https = true;
-	else
-	{
+	if (str_starts_with($base_url, 'https://')) {
+        $use_https = true;
+    }
+	else {
 		$content = s2_get_remote_file('https://'.substr($base_url, 7).$url_prefix.'/this/URL/_DoEs_/_NoT_/_eXiSt', 1, false, 10, true);
-		if ($content !== null && false !== strpos($content['content'], '<meta name="Generator" content="S2 '.S2_VERSION.'" />'))
-			$use_https = true;
+		if ($content !== null && str_contains($content['content'], '<meta name="Generator" content="S2" />')) {
+            $use_https = true;
+        }
 	}
 
 	return '<?php'."\n\n".'$db_type = \''.$db_type."';\n".
@@ -448,14 +450,15 @@ function get_preferred_lang ($languages)
     $app->boot((static function (): array
     {
         $result = [
-            'root_dir'     => S2_ROOT,
-            'cache_dir'    => S2_CACHE_DIR,
-            'log_dir'      => defined('S2_LOG_DIR') ? S2_LOG_DIR : S2_CACHE_DIR,
-            'base_url'     => defined('S2_BASE_URL') ? S2_BASE_URL : null,
-            'base_path'    => defined('S2_PATH') ? S2_PATH : null,
-            'debug'        => defined('S2_DEBUG'),
-            'debug_view'   => defined('S2_DEBUG_VIEW'),
-            'redirect_map' => [],
+            'root_dir'      => S2_ROOT,
+            'cache_dir'     => S2_CACHE_DIR,
+            'disable_cache' => false,
+            'log_dir'       => defined('S2_LOG_DIR') ? S2_LOG_DIR : S2_CACHE_DIR,
+            'base_url'      => defined('S2_BASE_URL') ? S2_BASE_URL : null,
+            'base_path'     => defined('S2_PATH') ? S2_PATH : null,
+            'debug'         => defined('S2_DEBUG'),
+            'debug_view'    => defined('S2_DEBUG_VIEW'),
+            'redirect_map'  => [],
         ];
 
         foreach (['db_type', 'db_host', 'db_name', 'db_username', 'db_password', 'db_prefix', 'p_connect'] as $globalVarName) {
@@ -570,7 +573,9 @@ function get_preferred_lang ($languages)
 
 	$s2_db->close();
 
-	S2Cache::clear();
+    /** @var ExtensionCache $cache */
+    $cache = \Container::get(ExtensionCache::class);
+    $cache->clear();
 
 	$alerts = array();
 	// Check if the cache directory is writable
diff --git a/_admin/site_ajax.php b/_admin/site_ajax.php
index dab8ee1c..ed921b54 100644
--- a/_admin/site_ajax.php
+++ b/_admin/site_ajax.php
@@ -10,6 +10,7 @@
  */
 
 use S2\Cms\Model\Model;
+use S2\Cms\Model\ExtensionCache;
 use S2\Cms\Pdo\DbLayer;
 
 define('S2_ROOT', '../');
@@ -766,10 +767,11 @@
     ($hook = s2_hook('rq_action_refresh_hooks_start')) ? eval($hook) : null;
     s2_test_user_rights($is_permission);
 
-    S2Cache::generate_hooks();
-    /** @var DbLayer $s2_db */
-    $s2_db = \Container::get(DbLayer::class);
-    S2Cache::generateEnabledExtensionClassNames($s2_db);
+    // Regenerate the hooks cache
+    /** @var ExtensionCache $cache */
+    $cache = \Container::get(ExtensionCache::class);
+    $cache->generateHooks();
+    $cache->generateEnabledExtensionClassNames();
 }
 
 elseif ($action == 'uninstall_extension')
diff --git a/_include/S2Cache.php b/_include/S2Cache.php
deleted file mode 100644
index bb7e58a2..00000000
--- a/_include/S2Cache.php
+++ /dev/null
@@ -1,130 +0,0 @@
-<?php
-
-use S2\Cms\Pdo\DbLayer;
-
-/**
- * Caching functions.
- *
- * This file contains all the functions used to generate the cache files used by the site.
- *
- * @noinspection PhpExpressionResultUnusedInspection
- *
- * @copyright (C) 2009-2023 Roman Parpalak, partially based on code (C) 2008-2009 PunBB
- * @license http://www.gnu.org/licenses/gpl.html GPL version 2 or higher
- * @package S2
- */
-class S2Cache
-{
-    public const CACHE_HOOK_NAMES_FILENAME         = S2_CACHE_DIR . 'cache_hook_names.php';
-    public const CACHE_ENABLED_EXTENSIONS_FILENAME = S2_CACHE_DIR . 'cache_enabled_extensions.php';
-    public const CACHE_ROUTES_FILENAME             = S2_CACHE_DIR . 'cache_routes.php';
-
-    /**
-     * Delete every .php file in the cache directory
-     *
-     * @return void
-     */
-    public static function clear(): void
-    {
-        $file_list = [
-            S2_CACHE_DIR . 'cache_config.php',
-            self::CACHE_HOOK_NAMES_FILENAME,
-            self::CACHE_ENABLED_EXTENSIONS_FILENAME,
-            self::CACHE_ROUTES_FILENAME,
-        ];
-
-        $return = ($hook = s2_hook('fn_clear_cache_start')) ? eval($hook) : null;
-        if ($return !== null) {
-            return;
-        }
-
-        foreach ($file_list as $entry) {
-            @unlink($entry);
-        }
-    }
-
-    public static function generateEnabledExtensionClassNames(DbLayer $dbLayer): array
-    {
-        $result = $dbLayer->buildAndQuery([
-            'SELECT' => 'id',
-            'FROM'   => 'extensions',
-            'WHERE'  => 'disabled=0',
-        ]);
-
-        $extensionClassNames = [];
-        while ($extension = $dbLayer->fetchAssoc($result)) {
-            $className = sprintf('\s2_extensions\%s\Extension', $extension['id']);
-            if (class_exists($className)) {
-                $extensionClassNames[] = $className;
-            }
-        }
-
-        // Output hooks as PHP code
-        try {
-            s2_overwrite_file_skip_locked(self::CACHE_ENABLED_EXTENSIONS_FILENAME, "<?php\n\nreturn " . var_export($extensionClassNames, true) . ';');
-        } catch (\RuntimeException $e) {
-            error('Unable to write hooks cache file to cache directory. Please make sure PHP has write access to the directory \'' . S2_CACHE_DIR . '\'.', __FILE__, __LINE__);
-        }
-
-        return $extensionClassNames;
-    }
-
-    /**
-     * Generate the hooks cache
-     */
-    public static function generate_hooks(): array
-    {
-        /** @var DbLayer $s2_db */
-        $s2_db = \Container::get(DbLayer::class);
-
-        if (!isset($s2_db)) {
-            return []; // Install
-        }
-
-        // Get extensions from the DB
-        $query = array(
-            'SELECT' => 'e.id',
-            'FROM'   => 'extensions AS e',
-            'WHERE'  => 'e.disabled=0',
-        );
-
-        $result = $s2_db->buildAndQuery($query);
-
-        $map = [];
-        while ($extension = $s2_db->fetchAssoc($result)) {
-            $hooks = glob(S2_ROOT . '_extensions/' . $extension['id'] . '/hooks/*.php');
-            foreach ($hooks as $filename) {
-                if (1 !== preg_match($regex = '#/([a-z_\-0-9]+?)(?:_(\d))?\.php$#S', $filename, $matches)) {
-                    throw new RuntimeException(sprintf('Found invalid characters in hook filename "%s". Allowed name must match %s.', $filename, $regex));
-                }
-                $priority = (int)($matches[2] ?? 5);
-                $hookName = $matches[1];
-
-                // Structure
-                $map[$hookName][$priority][] = '_extensions/' . $extension['id'] . '/hooks' . $matches[0];
-            }
-        }
-
-        array_walk($map, static function (&$mapItem) {
-            // Sort by priority
-            ksort($mapItem);
-            // Remove grouping by priority
-            $mapItem = array_merge(...$mapItem);
-        });
-
-        if (defined('S2_DISABLE_CACHE')) {
-            return $map;
-        }
-
-        $cacheHookNamesContent = "<?php\n\nreturn " . var_export($map, true) . ';';
-
-        // Output hooks as PHP code
-        try {
-            s2_overwrite_file_skip_locked(self::CACHE_HOOK_NAMES_FILENAME, $cacheHookNamesContent);
-        } catch (\RuntimeException $e) {
-            error('Unable to write hooks cache file to cache directory. Please make sure PHP has write access to the directory \'' . S2_CACHE_DIR . '\'.', __FILE__, __LINE__);
-        }
-
-        return $map;
-    }
-}
diff --git a/_include/common.php b/_include/common.php
index 14476cde..37eac1a1 100644
--- a/_include/common.php
+++ b/_include/common.php
@@ -10,6 +10,7 @@
 use Psr\Log\LoggerInterface;
 use S2\Cms\CmsExtension;
 use S2\Cms\Framework\Application;
+use S2\Cms\Model\ExtensionCache;
 use Symfony\Component\ErrorHandler\Debug;
 use Symfony\Component\ErrorHandler\ErrorHandler;
 use Symfony\Component\ErrorHandler\ErrorRenderer\HtmlErrorRenderer;
@@ -43,19 +44,34 @@
 }
 HtmlErrorRenderer::setTemplate(realpath(S2_ROOT . '_include/views/error.php'));
 
+if (!defined('S2_URL_PREFIX')) {
+    define('S2_URL_PREFIX', '');
+}
+
+// If the image directory is not specified, we use the default setting
+if (!defined('S2_IMG_DIR')) {
+    define('S2_IMG_DIR', '_pictures');
+}
+define('S2_IMG_PATH', S2_ROOT . S2_IMG_DIR);
+
+if (!defined('S2_ALLOWED_EXTENSIONS')) {
+    define('S2_ALLOWED_EXTENSIONS', 'gif bmp jpg jpeg png ico svg mp3 wav avi flv mpg mpeg mkv zip 7z doc pdf');
+}
+
 function collectParameters(): array
 {
     $result = [
-        'root_dir'     => S2_ROOT,
-        'cache_dir'    => S2_CACHE_DIR,
-        'log_dir'      => defined('S2_LOG_DIR') ? S2_LOG_DIR : S2_CACHE_DIR,
-        'base_url'     => defined('S2_BASE_URL') ? S2_BASE_URL : null,
-        'base_path'    => defined('S2_PATH') ? S2_PATH : null,
-        'url_prefix'   => defined('S2_URL_PREFIX') ? S2_URL_PREFIX : null,
-        'debug'        => defined('S2_DEBUG'),
-        'debug_view'   => defined('S2_DEBUG_VIEW'),
-        'show_queries' => defined('S2_SHOW_QUERIES'),
-        'redirect_map' => $GLOBALS['s2_redirect'] ?? [],
+        'root_dir'      => S2_ROOT,
+        'cache_dir'     => S2_CACHE_DIR,
+        'disable_cache' => defined('S2_DISABLE_CACHE'),
+        'log_dir'       => defined('S2_LOG_DIR') ? S2_LOG_DIR : S2_CACHE_DIR,
+        'base_url'      => defined('S2_BASE_URL') ? S2_BASE_URL : null,
+        'base_path'     => defined('S2_PATH') ? S2_PATH : null,
+        'url_prefix'    => defined('S2_URL_PREFIX') ? S2_URL_PREFIX : null,
+        'debug'         => defined('S2_DEBUG'),
+        'debug_view'    => defined('S2_DEBUG_VIEW'),
+        'show_queries'  => defined('S2_SHOW_QUERIES'),
+        'redirect_map'  => $GLOBALS['s2_redirect'] ?? [],
     ];
 
     foreach (['db_type', 'db_host', 'db_name', 'db_username', 'db_password', 'db_prefix', 'p_connect'] as $globalVarName) {
@@ -68,26 +84,30 @@ function collectParameters(): array
 $app = new Application();
 $app->addExtension(new CmsExtension());
 
-if (!defined('S2_DISABLE_CACHE')) {
-    $app->setCachedRoutesFilename(S2Cache::CACHE_ROUTES_FILENAME);
-}
-
 $enabledExtensions = null;
-if (!defined('S2_DISABLE_CACHE') && file_exists(S2Cache::CACHE_ENABLED_EXTENSIONS_FILENAME)) {
-    $enabledExtensions = include S2Cache::CACHE_ENABLED_EXTENSIONS_FILENAME;
+if (!defined('S2_DISABLE_CACHE') && file_exists(S2_CACHE_DIR.ExtensionCache::CACHE_ENABLED_EXTENSIONS_FILENAME)) {
+    $enabledExtensions = include S2_CACHE_DIR.ExtensionCache::CACHE_ENABLED_EXTENSIONS_FILENAME;
 }
 
 try {
     if (!is_array($enabledExtensions)) {
         $app->boot(collectParameters());
         \Container::setContainer($app->container);
-        $enabledExtensions = S2Cache::generateEnabledExtensionClassNames($app->container->get(\S2\Cms\Pdo\DbLayer::class));
+        /** @var ExtensionCache $appCache */
+        $appCache          = $app->container->get(ExtensionCache::class);
+        $enabledExtensions = $appCache->generateEnabledExtensionClassNames();
     }
     foreach ($enabledExtensions as $extension) {
         $app->addExtension(new $extension());
     }
 
     $app->boot(collectParameters());
+    /** @var ExtensionCache $appCache */
+    $appCache = $app->container->get(ExtensionCache::class);
+    if (!defined('S2_DISABLE_CACHE')) {
+        $app->setCachedRoutesFilename($appCache->getCachedRoutesFilename());
+    }
+
     \Container::setContainer($app->container);
     $app->container->getParameter('base_url');
 } catch (\S2\Cms\Framework\Exception\ParameterNotFoundException $e) {
@@ -100,20 +120,6 @@ function collectParameters(): array
 }
 $errorHandler->setDefaultLogger($app->container->get(LoggerInterface::class));
 
-if (!defined('S2_URL_PREFIX')) {
-    define('S2_URL_PREFIX', '');
-}
-
-// If the image directory is not specified, we use the default setting
-if (!defined('S2_IMG_DIR')) {
-    define('S2_IMG_DIR', '_pictures');
-}
-define('S2_IMG_PATH', S2_ROOT . S2_IMG_DIR);
-
-if (!defined('S2_ALLOWED_EXTENSIONS')) {
-    define('S2_ALLOWED_EXTENSIONS', 'gif bmp jpg jpeg png ico svg mp3 wav avi flv mpg mpeg mkv zip 7z doc pdf');
-}
-
 // Load cached config
 if (file_exists(S2_CACHE_DIR . 'cache_config.php')) {
     include S2_CACHE_DIR . 'cache_config.php';
diff --git a/_include/functions.php b/_include/functions.php
index f729390d..c199c0bf 100644
--- a/_include/functions.php
+++ b/_include/functions.php
@@ -8,6 +8,7 @@
  */
 
 
+use S2\Cms\Model\ExtensionCache;
 use S2\Cms\Model\UrlBuilder;
 use S2\Cms\Pdo\DbLayerException;
 
@@ -117,20 +118,6 @@ function s2_paging($page, $total_pages, $url, &$link_nav)
 }
 
 
-function s2_build_copyright()
-{
-    global $request_uri;
-
-    $author    = S2_WEBMASTER ? S2_WEBMASTER : S2_SITE_NAME;
-    $copyright = S2_WEBMASTER && S2_WEBMASTER_EMAIL ? s2_js_mailto($author, S2_WEBMASTER_EMAIL) : ($request_uri !== '/' ? '<a href="' . s2_link('/') . '">' . $author . '</a>' : $author);
-
-    return (S2_START_YEAR != date('Y') ?
-            sprintf(Lang::get('Copyright 2'), $copyright, S2_START_YEAR, date('Y')) :
-            sprintf(Lang::get('Copyright 1'), $copyright, date('Y'))) . ' ' .
-        sprintf(Lang::get('Powered by'), '<a href="http://s2cms.ru/">S2</a>');
-}
-
-
 //
 // Encodes the contents of $str so that they are safe to output on an (X)HTML page
 //
@@ -345,12 +332,9 @@ function s2_hook($hook_id)
     static $hookNames = null;
 
     if ($hookNames === null) {
-        if (!defined('S2_DISABLE_CACHE') && file_exists(S2Cache::CACHE_HOOK_NAMES_FILENAME)) {
-            $hookNames = include S2Cache::CACHE_HOOK_NAMES_FILENAME;
-        }
-        if (!is_array($hookNames)) {
-            $hookNames = S2Cache::generate_hooks();
-        }
+        /** @var ExtensionCache $cache */
+        $cache = \Container::get(ExtensionCache::class);
+        $hookNames = $cache->getHookNames();
     }
 
     if (!isset($hookNames[$hook_id])) {
@@ -419,7 +403,7 @@ function error()
     <html>
     <head>
         <meta charset="utf-8"/>
-        <meta name="Generator" content="S2 <?php echo S2_VERSION; ?>"/>
+        <meta name="Generator" content="S2"/>
         <title>Error - <?php echo s2_htmlencode(S2_SITE_NAME); ?></title>
         <style>
             body {
diff --git a/_include/src/CmsExtension.php b/_include/src/CmsExtension.php
index 56c4686e..4bc061a5 100644
--- a/_include/src/CmsExtension.php
+++ b/_include/src/CmsExtension.php
@@ -26,6 +26,7 @@
 use S2\Cms\Image\ThumbnailGenerator;
 use S2\Cms\Layout\LayoutMatcherFactory;
 use S2\Cms\Logger\Logger;
+use S2\Cms\Model\ExtensionCache;
 use S2\Cms\Model\UrlBuilder;
 use S2\Cms\Pdo\DbLayer;
 use S2\Cms\Pdo\DbLayerPostgres;
@@ -58,7 +59,6 @@
 
 class CmsExtension implements ExtensionInterface
 {
-
     public function buildContainer(Container $container): void
     {
         $container->set(DbLayer::class, function (Container $container) {
@@ -95,7 +95,7 @@ public function buildContainer(Container $container): void
 
             return match ($db_type) {
                 'mysql' => new PDO("mysql:host=$db_host;dbname=$db_name;charset=utf8mb4", $db_username, $db_password),
-                'sqlite' => PdoSqliteFactory::create($db_name, $p_connect),
+                'sqlite' => PdoSqliteFactory::create($container->getParameter('root_dir').$db_name, $p_connect),
                 'pgsql' => new PDO("pgsql:host=$db_host;dbname=$db_name", $db_username, $db_password),
                 default => throw new \RuntimeException(sprintf('Unsupported db_type="%s"', $db_type)),
             };
@@ -149,6 +149,14 @@ public function buildContainer(Container $container): void
             );
         });
 
+        $container->set(ExtensionCache::class, function (Container $container) {
+            return new ExtensionCache(
+                $container->get(DbLayer::class),
+                $container->getParameter('disable_cache'),
+                $container->getParameter('root_dir'),
+                $container->getParameter('cache_dir'),
+            );
+        });
 
         $container->set(ThumbnailGenerator::class, function (Container $container) {
             return new ThumbnailGenerator(
@@ -207,18 +215,16 @@ public function buildContainer(Container $container): void
         });
 
         $container->set(HtmlTemplateProvider::class, function (Container $container) {
-            /** @var DynamicConfigProvider $provider */
-            $provider = $container->get(DynamicConfigProvider::class);
             return new HtmlTemplateProvider(
                 $container->get(RequestStack::class),
                 $container->get(Viewer::class),
                 $container->get(\Symfony\Contracts\EventDispatcher\EventDispatcherInterface::class),
+                $container->get(DynamicConfigProvider::class),
                 $container->getParameter('debug'),
                 $container->getParameter('debug_view'),
                 $container->getParameter('root_dir'),
                 $container->getParameter('cache_dir'),
                 $container->getParameter('base_path'),
-                $provider->get('S2_STYLE'),
             );
         });
 
diff --git a/_include/src/Config/DynamicConfigProvider.php b/_include/src/Config/DynamicConfigProvider.php
index adbd968e..f25d96c8 100644
--- a/_include/src/Config/DynamicConfigProvider.php
+++ b/_include/src/Config/DynamicConfigProvider.php
@@ -74,6 +74,7 @@ private function loadParams(): mixed
                 $result[$row[0]]    = $row[1];
             }
 
+            // Deprecated. Remove when all values are accessed through this class, not global constants.
             try {
                 s2_overwrite_file_skip_locked($this->cacheDir . 'cache_config.php', '<?php' . "\n\n" . 'define(\'S2_CONFIG_LOADED\', 1);' . "\n\n" . $legacyConfigOutput . "\n");
             } catch (\RuntimeException $e) {
diff --git a/_include/src/Model/ExtensionCache.php b/_include/src/Model/ExtensionCache.php
new file mode 100644
index 00000000..0ec4440a
--- /dev/null
+++ b/_include/src/Model/ExtensionCache.php
@@ -0,0 +1,169 @@
+<?php
+/**
+ * Cache functions for extensions.
+ *
+ * This file contains the functions used to generate the cache files used for extension system.
+ *
+ * @copyright 2009-2024 Roman Parpalak
+ * @license MIT
+ * @package S2
+ */
+
+declare(strict_types=1);
+
+namespace S2\Cms\Model;
+
+use S2\Cms\Pdo\DbLayer;
+
+class ExtensionCache
+{
+    public function __construct(
+        private readonly DbLayer $dbLayer,
+        private readonly bool    $disableCache,
+        private readonly string  $rootDir,
+        private readonly string  $cacheDir,
+    ) {
+    }
+
+    public const CACHE_ENABLED_EXTENSIONS_FILENAME = 'cache_enabled_extensions.php';
+
+    /**
+     * Delete every .php cache file in the cache directory
+     */
+    public function clear(): void
+    {
+        $file_list = [
+            // Deprecated. Remove when all values are accessed through DynamicConfigProvider
+            $this->cacheDir . 'cache_config.php',
+
+            $this->getHookNamesCacheFilename(),
+            $this->cacheDir . self::CACHE_ENABLED_EXTENSIONS_FILENAME,
+            $this->getCachedRoutesFilename(),
+        ];
+
+        foreach ($file_list as $entry) {
+            @unlink($entry);
+        }
+    }
+
+    /**
+     * Retrieves Extension class names if they exist for enabled extensions.
+     */
+    public function generateEnabledExtensionClassNames(): array
+    {
+        $result = $this->dbLayer->buildAndQuery([
+            'SELECT' => 'id',
+            'FROM'   => 'extensions',
+            'WHERE'  => 'disabled=0',
+        ]);
+
+        $extensionClassNames = [];
+        while ($extension = $this->dbLayer->fetchAssoc($result)) {
+            $className = sprintf('\s2_extensions\%s\Extension', $extension['id']);
+            if (class_exists($className)) {
+                $extensionClassNames[] = $className;
+            }
+        }
+
+        if ($this->disableCache) {
+            return $extensionClassNames;
+        }
+
+        // Output extension class names as PHP code
+        try {
+            s2_overwrite_file_skip_locked(
+                $this->cacheDir . self::CACHE_ENABLED_EXTENSIONS_FILENAME,
+                "<?php\n\nreturn " . var_export($extensionClassNames, true) . ';'
+            );
+        } catch (\RuntimeException $e) {
+            error(sprintf(
+                'Unable to write hooks cache file to cache directory. Please make sure PHP has write access to the directory "%s".',
+                $this->cacheDir
+            ), __FILE__, __LINE__);
+        }
+
+        return $extensionClassNames;
+    }
+
+    /**
+     * Scans hook directories for enabled extensions and generates the map of hook file names.
+     */
+    public function generateHooks(): array
+    {
+        // Get extensions from the DB
+        $query = [
+            'SELECT' => 'e.id',
+            'FROM'   => 'extensions AS e',
+            'WHERE'  => 'e.disabled=0',
+        ];
+
+        $result = $this->dbLayer->buildAndQuery($query);
+
+        $map = [];
+        while ($extension = $this->dbLayer->fetchAssoc($result)) {
+            $hooks = glob($this->rootDir . '_extensions/' . $extension['id'] . '/hooks/*.php');
+            foreach ($hooks as $filename) {
+                if (1 !== preg_match($regex = '#/([a-z_\-0-9]+?)(?:_(\d))?\.php$#S', $filename, $matches)) {
+                    throw new \RuntimeException(sprintf('Found invalid characters in hook filename "%s". Allowed name must match %s.', $filename, $regex));
+                }
+                $priority = (int)($matches[2] ?? 5);
+                $hookName = $matches[1];
+
+                // Structure
+                $map[$hookName][$priority][] = '_extensions/' . $extension['id'] . '/hooks' . $matches[0];
+            }
+        }
+
+        array_walk($map, static function (&$mapItem) {
+            // Sort by priority
+            ksort($mapItem);
+            // Remove grouping by priority
+            $mapItem = array_merge(...$mapItem);
+        });
+
+        if ($this->disableCache) {
+            return $map;
+        }
+
+        // Output hooks as PHP code
+        try {
+            s2_overwrite_file_skip_locked(
+                $this->getHookNamesCacheFilename(),
+                "<?php\n\nreturn " . var_export($map, true) . ';'
+            );
+        } catch (\RuntimeException $e) {
+            error(sprintf(
+                'Unable to write hooks cache file to cache directory. Please make sure PHP has write access to the directory "%s".',
+                $this->cacheDir
+            ), __FILE__, __LINE__);
+        }
+
+        return $map;
+    }
+
+    /**
+     * Retrieves hook names for enabled extensions from cache or by scanning hook directories.
+     */
+    public function getHookNames(): array
+    {
+        $hookNames = null;
+        if (!$this->disableCache && file_exists($filename = $this->getHookNamesCacheFilename())) {
+            $hookNames = include $filename;
+        }
+        if (!\is_array($hookNames)) {
+            $hookNames = $this->generateHooks();
+        }
+
+        return $hookNames;
+    }
+
+    public function getCachedRoutesFilename(): string
+    {
+        return S2_CACHE_DIR . 'cache_routes.php';
+    }
+
+    private function getHookNamesCacheFilename(): string
+    {
+        return $this->cacheDir . 'cache_hook_names.php';
+    }
+}
diff --git a/_include/src/Model/Installer.php b/_include/src/Model/Installer.php
index c3b0fa23..6bd792e5 100644
--- a/_include/src/Model/Installer.php
+++ b/_include/src/Model/Installer.php
@@ -23,10 +23,6 @@ public function __construct(private DbLayer $dbLayer)
      */
     public function createTables(): void
     {
-        // Start a transaction
-        $this->dbLayer->startTransaction();
-
-
         // Create all tables
         $schema = array(
             'FIELDS'		=> array(
diff --git a/_include/src/Pdo/PdoSqliteFactory.php b/_include/src/Pdo/PdoSqliteFactory.php
index 558b4cfa..0ea12b20 100644
--- a/_include/src/Pdo/PdoSqliteFactory.php
+++ b/_include/src/Pdo/PdoSqliteFactory.php
@@ -11,14 +11,8 @@
 
 class PdoSqliteFactory
 {
-    public static function create(string $dbName, bool $persistentConnection): PDO
+    public static function create(string $dbFilename, bool $persistentConnection): PDO
     {
-        if (!\defined('S2_ROOT')) {
-            throw new \LogicException('S2_ROOT constant must be defined.');
-        }
-
-        $dbFilename = S2_ROOT . $dbName;
-
         if (!file_exists($dbFilename)) {
             @touch($dbFilename);
             @chmod($dbFilename, 0666);
diff --git a/_include/src/Template/HtmlTemplate.php b/_include/src/Template/HtmlTemplate.php
index 7f0ccffa..b639626c 100644
--- a/_include/src/Template/HtmlTemplate.php
+++ b/_include/src/Template/HtmlTemplate.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * @copyright 2024 Roman Parpalak
+ * @copyright 2009-2024 Roman Parpalak
  * @license MIT
  * @package S2
  */
@@ -9,6 +9,9 @@
 
 namespace S2\Cms\Template;
 
+use Psr\Cache\InvalidArgumentException;
+use S2\Cms\Config\DynamicConfigProvider;
+use Symfony\Component\HttpFoundation\RequestStack;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
 
@@ -22,9 +25,11 @@ class HtmlTemplate
 
     public function __construct(
         private readonly string                   $template,
+        private readonly RequestStack             $requestStack,
+        private readonly Viewer                   $viewer,
         private readonly EventDispatcherInterface $eventDispatcher,
-        private readonly Viewer $viewer,
-        private readonly bool $debugView,
+        private readonly DynamicConfigProvider    $dynamicConfigProvider,
+        private readonly bool                     $debugView,
     ) {
     }
 
@@ -57,12 +62,12 @@ public function toHttpResponse(): Response
 
         // HTML head
         $replace['<!-- s2_head_title -->'] = empty($this->page['head_title']) ?
-            (!empty($this->page['title']) ? $this->page['title'] . ' - ' : '') . S2_SITE_NAME :
+            (!empty($this->page['title']) ? $this->page['title'] . ' - ' : '') . $this->dynamicConfigProvider->get('S2_SITE_NAME') :
             $this->page['head_title'];
 
         // Meta tags processing
         $meta_tags = [
-            '<meta name="Generator" content="S2 ' . S2_VERSION . '" />',
+            '<meta name="Generator" content="S2" />',
         ];
 
         if (!empty($this->page['meta_keywords'])) {
@@ -83,7 +88,7 @@ public function toHttpResponse(): Response
         $replace['<!-- s2_rss_link -->'] = implode("\n", $this->page['rss_link']);
 
         // Content
-        $replace['<!-- s2_site_title -->'] = S2_SITE_NAME;
+        $replace['<!-- s2_site_title -->'] = $this->dynamicConfigProvider->get('S2_SITE_NAME');
 
         $link_navigation = [];
         foreach ($this->navLinks as $link_rel => $link_href) {
@@ -102,7 +107,7 @@ public function toHttpResponse(): Response
             $replace['<!-- s2_' . $placeholderName . ' -->'] = $this->page[$placeholderName] ?? '';
         }
 
-        if (S2_ENABLED_COMMENTS && !empty($this->page['commented'])) {
+        if (!empty($this->page['commented']) && S2_ENABLED_COMMENTS) {
             $comment_array = [
                 'id' => $this->page['id'] . '.' . ($this->page['class'] ?? '')
             ];
@@ -143,7 +148,7 @@ public function toHttpResponse(): Response
         }
 
         // Footer
-        $replace['<!-- s2_copyright -->'] = s2_build_copyright();
+        $replace['<!-- s2_copyright -->'] = $this->s2_build_copyright();
 
         $this->eventDispatcher->dispatch(new TemplateEvent($this), TemplateEvent::EVENT_PRE_REPLACE);
 
@@ -233,4 +238,24 @@ protected function simplePlaceholders(): array
             'article_tags'
         ];
     }
+
+    /**
+     * @throws InvalidArgumentException
+     */
+    private function s2_build_copyright(): string
+    {
+        $request_uri = $this->requestStack->getCurrentRequest()?->getPathInfo();
+
+        $webmaster = $this->dynamicConfigProvider->get('S2_WEBMASTER');
+        $email     = $this->dynamicConfigProvider->get('S2_WEBMASTER_EMAIL');
+        $startYear = $this->dynamicConfigProvider->get('S2_START_YEAR');
+
+        $author    = $webmaster ?: $this->dynamicConfigProvider->get('S2_SITE_NAME');
+        $copyright = $webmaster && $email ? s2_js_mailto($author, $email) : ($request_uri !== '/' ? '<a href="' . s2_link('/') . '">' . $author . '</a>' : $author);
+
+        return ($startYear !== date('Y') ?
+                sprintf(\Lang::get('Copyright 2'), $copyright, $startYear, date('Y')) :
+                sprintf(\Lang::get('Copyright 1'), $copyright, date('Y'))) . ' ' .
+            sprintf(\Lang::get('Powered by'), '<a href="http://s2cms.ru/">S2</a>');
+    }
 }
diff --git a/_include/src/Template/HtmlTemplateProvider.php b/_include/src/Template/HtmlTemplateProvider.php
index bf665246..b34cb771 100644
--- a/_include/src/Template/HtmlTemplateProvider.php
+++ b/_include/src/Template/HtmlTemplateProvider.php
@@ -14,22 +14,26 @@
 
 use S2\Cms\Asset\AssetMerge;
 use S2\Cms\Asset\AssetPack;
+use S2\Cms\Config\DynamicConfigProvider;
 use Symfony\Component\HttpFoundation\RequestStack;
 use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
 
 class HtmlTemplateProvider
 {
+    private readonly string $styleName;
+
     public function __construct(
         private readonly RequestStack             $requestStack,
         private readonly Viewer                   $viewer,
         private readonly EventDispatcherInterface $dispatcher,
+        private readonly DynamicConfigProvider    $dynamicConfigProvider,
         private readonly bool                     $debug,
         private readonly bool                     $debugView,
         private readonly string                   $rootDir,
         private readonly string                   $cacheDir,
         private readonly string                   $basePath,
-        private readonly string                   $styleName,
     ) {
+        $this->styleName = $this->dynamicConfigProvider->get('S2_STYLE');
     }
 
     public function getTemplate(string $templateId): HtmlTemplate
@@ -37,7 +41,14 @@ public function getTemplate(string $templateId): HtmlTemplate
         $templateContent = $this->getRawTemplateContent($templateId);
         $templateContent = $this->replaceCurrentLinks($templateContent);
 
-        $htmlTemplate = new HtmlTemplate($templateContent, $this->dispatcher, $this->viewer, $this->debugView);
+        $htmlTemplate = new HtmlTemplate(
+            $templateContent,
+            $this->requestStack,
+            $this->viewer,
+            $this->dispatcher,
+            $this->dynamicConfigProvider,
+            $this->debugView,
+        );
 
         $this->dispatcher->dispatch(new TemplateEvent($htmlTemplate), TemplateEvent::EVENT_CREATED);
 
diff --git a/_include/views/error.php b/_include/views/error.php
index 602b76ff..6c5caa86 100644
--- a/_include/views/error.php
+++ b/_include/views/error.php
@@ -3,7 +3,7 @@
 <html>
 <head>
     <meta charset="utf-8" />
-    <meta name="Generator" content="S2 <?php echo S2_VERSION; ?>" />
+    <meta name="Generator" content="S2" />
     <title>Error - <?php echo defined('S2_SITE_NAME') ? s2_htmlencode(S2_SITE_NAME) : 'S2'; ?></title>
     <style>
         body {
diff --git a/_include/views/rss.php b/_include/views/rss.php
index 8e8da211..c500da2c 100644
--- a/_include/views/rss.php
+++ b/_include/views/rss.php
@@ -18,7 +18,7 @@
 			<title><?php echo s2_htmlencode($rss_title); ?></title>
 			<link><?php echo $rss_link; ?></link>
 			<description><?php echo s2_htmlencode($rss_description); ?></description>
-			<generator>S2 <?php echo S2_VERSION; ?></generator>
+			<generator>S2</generator>
 			<ttl>10</ttl>
 			<atom:link href="<?php echo s2_abs_link($self_link); ?>" rel="self" type="application/rss+xml" />
 			<lastBuildDate><?php echo gmdate('D, d M Y H:i:s', $maxContentTime).' GMT'; ?></lastBuildDate>
diff --git a/_tests/_support/Helper/Integration.php b/_tests/_support/Helper/Integration.php
index f6673342..3d661dcd 100644
--- a/_tests/_support/Helper/Integration.php
+++ b/_tests/_support/Helper/Integration.php
@@ -10,10 +10,13 @@
 namespace Helper;
 
 use Codeception\Module;
+use Psr\Container\ContainerExceptionInterface;
+use Psr\Container\NotFoundExceptionInterface;
 use S2\Cms\CmsExtension;
 use S2\Cms\Framework\Application;
 use S2\Cms\Model\Installer;
 use S2\Cms\Pdo\DbLayer;
+use S2\Cms\Pdo\DbLayerException;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 
@@ -22,6 +25,11 @@ class Integration extends Module
     protected ?Application $application = null;
     protected ?Response $response = null;
 
+    /**
+     * @throws ContainerExceptionInterface
+     * @throws DbLayerException
+     * @throws NotFoundExceptionInterface
+     */
     public function _initialize()
     {
         $this->application = new Application();
@@ -32,54 +40,53 @@ public function _initialize()
         $installer->createTables();
     }
 
-    public function _after(\Codeception\TestInterface $test)
-    {
-        // Освобождаем ресурсы, если это необходимо
-    }
-
-    public function amOnPage(string $url)
+    public function amOnPage(string $url): void
     {
         $request        = new Request([], [], [], [], [], ['REQUEST_URI' => $url]);
         $this->response = $this->application->handle($request);
     }
 
-    public function see($text)
+    public function see(string $text): void
     {
-        // Метод для проверки наличия текста на странице
-        // Используем сохраненный ранее response
         $this->assertTrue(str_contains($this->response->getContent(), $text));
     }
 
-    // Метод для инициализации Request и получения Response
-    public function sendRequest($url)
+    public function seeResponseCodeIs(int $code): void
     {
-        $request        = new Request($url);
-        $this->response = $this->application->handle($request);
+        $this->assertEquals($code, $this->response->getStatusCode());
+    }
 
-        return $this->response;
+    public function seeLocationIs(string $location): void
+    {
+        $this->assertEquals($location, $this->response->headers->get('Location'));
     }
 
     protected function collectParameters(): array
     {
         $result = [
-            'root_dir'     => './',
-            'cache_dir'    => '_cache/test/',
-            'log_dir'      => '_cache/test/',
-            'base_url'     => 'http://localhost:8881',
-            'base_path'    => '',
-            'url_prefix'   => '',
-            'debug'        => false,
-            'debug_view'   => false,
-            'show_queries' => false,
-            'redirect_map' => [],
+            'root_dir'      => './',
+            'cache_dir'     => '_cache/test/',
+            'log_dir'       => '_cache/test/',
+            'disable_cache' => false,
+            'base_url'      => 'http://s2.localhost',
+            'base_path'     => '',
+            'url_prefix'    => '',
+            'debug'         => false,
+            'debug_view'    => false,
+            'show_queries'  => false,
+            'redirect_map'  => [
+                '#^/redirect$#' => '/redirected',
+            ],
 
-            'db_type'     => 'mysql',
             'db_host'     => '127.0.0.1',
             'db_name'     => 's2_test',
-            'db_username' => 'root',
-            'db_password' => '',
             'db_prefix'   => '',
             'p_connect'   => false,
+            ...(match (getenv('APP_DB_TYPE')) {
+                'sqlite' => ['db_type' => 'sqlite', 'db_username' => '', 'db_password' => ''],
+                'pgsql'  => ['db_type' => 'pgsql', 'db_username' => 'postgres', 'db_password' => '12345'],
+                default => ['db_type' => 'mysql', 'db_username' => 'root', 'db_password' => ''],
+            })
         ];
 
         return $result;
diff --git a/_tests/integration/RedirectCest.php b/_tests/integration/RedirectCest.php
new file mode 100644
index 00000000..481a8ee7
--- /dev/null
+++ b/_tests/integration/RedirectCest.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace integration;
+
+use \IntegrationTester;
+use Symfony\Component\HttpFoundation\Response;
+
+class RedirectCest
+{
+    public function _before(IntegrationTester $I)
+    {
+    }
+
+    // tests
+    public function tryToTest(IntegrationTester $I)
+    {
+        $I->amOnPage('/redirect');
+        $I->seeResponseCodeIs(Response::HTTP_MOVED_PERMANENTLY);
+        $I->seeLocationIs('/redirected');
+    }
+}