diff --git a/packages/wp-mu-plugin/stretch-extra/stretch-extra.php b/packages/wp-mu-plugin/stretch-extra/stretch-extra.php
index e37547d9..44451a63 100644
--- a/packages/wp-mu-plugin/stretch-extra/stretch-extra.php
+++ b/packages/wp-mu-plugin/stretch-extra/stretch-extra.php
@@ -19,10 +19,13 @@
 
 defined('ABSPATH') || exit();
 
-// // Set SFS server variable to fake stretch-extra context
-// if (!array_key_exists('SFS', $_SERVER)) {
-//   $_SERVER['SFS'] = 'stretch-extra';
-// }
+// Set SFS server variable to fake stretch-extra context
+if (! defined('IONOS_IS_STRETCH_SFS')  && defined('IONOS_IS_STRETCH') && \IONOS_IS_STRETCH) {
+  define('IONOS_IS_STRETCH_SFS', array_key_exists('SFS', $_SERVER));
+}
+if (defined('IONOS_IS_STRETCH_SFS') && ! \IONOS_IS_STRETCH_SFS) {
+  $_SERVER['SFS'] = 'stretch-extra';
+}
 
 // abort if called from WP-CLI to avoid issues with command line scripts
 // (need to prevent execution while wp was loaded by wp-cli)
diff --git a/packages/wp-mu-plugin/stretch-extra/stretch-extra/inc/secondary-plugin-dir.php b/packages/wp-mu-plugin/stretch-extra/stretch-extra/inc/secondary-plugin-dir.php
index 861f3639..400f29a4 100644
--- a/packages/wp-mu-plugin/stretch-extra/stretch-extra/inc/secondary-plugin-dir.php
+++ b/packages/wp-mu-plugin/stretch-extra/stretch-extra/inc/secondary-plugin-dir.php
@@ -171,8 +171,8 @@ function get_custom_plugins(): array
  */
 \add_filter('plugins_url', function ($url, $path, $plugin) {
   // if its not one of our plugins just return the original url
-  // array_key_exists('SFS', $_SERVER) is required to work in local wp-env
-  if (! str_starts_with($plugin, IONOS_CUSTOM_PLUGINS_DIR) && ! array_key_exists('SFS', $_SERVER)) {
+  // array_key_exists('SFS', $_SERVER) or constant IONOS_IS_STRETCH_SFS is required to work in local wp-env
+  if (! str_starts_with($plugin, IONOS_CUSTOM_PLUGINS_DIR) && ! \IONOS_IS_STRETCH_SFS) {
     return $url;
   }
 
diff --git a/packages/wp-mu-plugin/stretch-extra/stretch-extra/inc/secondary-theme-dir.php b/packages/wp-mu-plugin/stretch-extra/stretch-extra/inc/secondary-theme-dir.php
index d6611df8..c7b9bcdd 100644
--- a/packages/wp-mu-plugin/stretch-extra/stretch-extra/inc/secondary-theme-dir.php
+++ b/packages/wp-mu-plugin/stretch-extra/stretch-extra/inc/secondary-theme-dir.php
@@ -40,8 +40,8 @@
   'stylesheet_directory_uri',
   function ($stylesheet_dir_uri, $stylesheet, $theme_root_uri) {
     // if its not one of our themes just return the original url
-    // array_key_exists('SFS', $_SERVER) is required to work in local wp-env
-    if (! str_ends_with($theme_root_uri, '/extra/themes') && ! array_key_exists('SFS', $_SERVER)) {
+    // array_key_exists('SFS', $_SERVER) or constant IONOS_IS_STRETCH_SFS is required to work in local wp-env
+    if (! str_ends_with($theme_root_uri, '/extra/themes') && ! \IONOS_IS_STRETCH_SFS) {
       return $stylesheet_dir_uri;
     }
 
@@ -65,8 +65,8 @@ function ($stylesheet_dir_uri, $stylesheet, $theme_root_uri) {
   'theme_file_uri',
   function ($url, $file) {
     // if its not one of our themes just return the original url
-    // array_key_exists('SFS', $_SERVER) is required to work in local wp-env
-    if (! str_contains($url, '/extra/themes/') && ! array_key_exists('SFS', $_SERVER)) {
+    // array_key_exists('SFS', $_SERVER) or constant IONOS_IS_STRETCH_SFS is required to work in local wp-env
+    if (! str_contains($url, '/extra/themes/') && ! \IONOS_IS_STRETCH_SFS) {
       return $url;
     }
 
@@ -88,8 +88,8 @@ function ($url, $file) {
   'template_directory_uri',
   function ($template_dir_uri, $template, $theme_root_uri) {
     // if its not one of our themes just return the original url
-    // array_key_exists('SFS', $_SERVER) is required to work in local wp-env
-    if (! str_ends_with($theme_root_uri, '/extra/themes') && ! array_key_exists('SFS', $_SERVER)) {
+    // array_key_exists('SFS', $_SERVER) or constant IONOS_IS_STRETCH_SFS is required to work in local wp-env
+    if (! str_ends_with($theme_root_uri, '/extra/themes') && ! \IONOS_IS_STRETCH_SFS) {
       return $template_dir_uri;
     }
 
@@ -103,8 +103,8 @@ function ($template_dir_uri, $template, $theme_root_uri) {
 \add_filter(
   'theme_root_uri',
   function ($theme_root_uri, $siteurl) {
-    // array_key_exists('SFS', $_SERVER) is required to work in local wp-env
-    if (! str_ends_with($theme_root_uri, '/extra/themes') && ! array_key_exists('SFS', $_SERVER)) {
+    // array_key_exists('SFS', $_SERVER) or constant IONOS_IS_STRETCH_SFS is required to work in local wp-env
+    if (! str_ends_with($theme_root_uri, '/extra/themes') && ! \IONOS_IS_STRETCH_SFS) {
       return $theme_root_uri;
     }
 
diff --git a/packages/wp-plugin/ionos-essentials/ionos-essentials.php b/packages/wp-plugin/ionos-essentials/ionos-essentials.php
index 072303f9..78580cca 100644
--- a/packages/wp-plugin/ionos-essentials/ionos-essentials.php
+++ b/packages/wp-plugin/ionos-essentials/ionos-essentials.php
@@ -151,10 +151,7 @@ function () {
 // soc plugin components
 require_once __DIR__ . '/ionos-essentials/inc/migration/index.php';
 
-function is_stretch(): bool
-{
-  return str_starts_with(getcwd(), '/home/www/public') || array_key_exists('SFS', $_SERVER);
-}
+define('IONOS_IS_STRETCH', str_starts_with(getcwd(), '/home/www/public'));
 
 /**
  * Check if a plugin is active, including custom plugins loaded via ionos stretch extra
diff --git a/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/dashboard/tabs/tools.php b/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/dashboard/tabs/tools.php
index 0da018d0..fc16daf6 100644
--- a/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/dashboard/tabs/tools.php
+++ b/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/dashboard/tabs/tools.php
@@ -5,7 +5,6 @@
 defined('ABSPATH') || exit();
 
 use function ionos\essentials\_is_plugin_active;
-use function ionos\essentials\is_stretch;
 use const ionos\essentials\security\IONOS_SECURITY_FEATURE_OPTION;
 use const ionos\essentials\security\IONOS_SECURITY_FEATURE_OPTION_CREDENTIALS_CHECKING;
 use const ionos\essentials\security\IONOS_SECURITY_FEATURE_OPTION_DEFAULT;
@@ -150,7 +149,7 @@ class="link link--action"><?php \esc_html_e('Preview maintenance page', 'ionos-e
                 'checked'   => get_settings_value(IONOS_SECURITY_FEATURE_OPTION_CREDENTIALS_CHECKING) ? 'checked' : '',
               ]);
 
-if (! is_stretch()) {
+if (! \IONOS_IS_STRETCH) {
   render_section([
     'title'       => \esc_html__('Block XML-RPC access', 'ionos-essentials'),
     'id'          => IONOS_SECURITY_FEATURE_OPTION_XMLRPC,
diff --git a/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/migration/index.php b/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/migration/index.php
index 8d3664b5..98992524 100644
--- a/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/migration/index.php
+++ b/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/migration/index.php
@@ -16,6 +16,8 @@
 
 defined('ABSPATH') || exit();
 
+define('IS_LOCAL', wp_get_environment_type() === 'local');
+
 use const ionos\essentials\PLUGIN_FILE;
 use const ionos\essentials\security\IONOS_SECURITY_FEATURE_OPTION;
 use const ionos\essentials\security\IONOS_SECURITY_FEATURE_OPTION_CREDENTIALS_CHECKING;
@@ -90,9 +92,9 @@ function _install()
       \add_option('ionos_loop_consent', $ionos_loop_consent_given);
 
       // install the performance plugin for all non stretch spaces
-      if (\ionos\essentials\is_stretch() === false                  &&
-      ! is_plugin_active('ionos-performance/ionos-performance.php') &&
-      false == strpos(home_url(), 'localhost')) {
+      if (! \IONOS_IS_STRETCH                                              &&
+      ! is_plugin_active('ionos-performance/ionos-performance.php')        &&
+      ! IS_LOCAL) {
         install_plugin_from_url(
           'https://s3-eu-central-1.ionoscloud.com/web-hosting/ionos-group/ionos-performance.latest.zip'
         );
diff --git a/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/security/index.php b/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/security/index.php
index ff458e04..d44c0311 100644
--- a/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/security/index.php
+++ b/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/security/index.php
@@ -2,7 +2,6 @@
 
 namespace ionos\essentials\security;
 
-use function ionos\essentials\is_stretch;
 use ionos\essentials\Tenant;
 
 defined('ABSPATH') || exit();
@@ -38,7 +37,7 @@
   }
 
   require_once __DIR__ . '/ssl.php';
-  if (! is_stretch()) {
+  if (! \IONOS_IS_STRETCH) {
     if (true === $security_options[IONOS_SECURITY_FEATURE_OPTION_XMLRPC]) {
       require_once __DIR__ . '/xmlrpc.php';
     }
diff --git a/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/tenants/ionos.php b/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/tenants/ionos.php
index d1d38c47..b15351b5 100644
--- a/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/tenants/ionos.php
+++ b/packages/wp-plugin/ionos-essentials/ionos-essentials/inc/tenants/ionos.php
@@ -4,7 +4,10 @@
 
 defined('ABSPATH')                          || exit();
 
-$is_sfs = array_key_exists('SFS', $_SERVER) || get_option('sfs_website_id');
+if (! defined('IONOS_IS_STRETCH_SFS') && defined('IONOS_IS_STRETCH') && \IONOS_IS_STRETCH) {
+  define('IONOS_IS_STRETCH_SFS', array_key_exists('SFS', $_SERVER));
+}
+$is_sfs = (defined('IONOS_IS_STRETCH_SFS') && \IONOS_IS_STRETCH_SFS) || get_option('sfs_website_id');
 
 $links = $is_sfs ? [
   [