diff --git a/src/Helpers/IsHelper.php b/src/Helpers/IsHelper.php
index 45001c9cb..fa4365881 100644
--- a/src/Helpers/IsHelper.php
+++ b/src/Helpers/IsHelper.php
@@ -23,12 +23,7 @@ class IsHelper
      */
     public static function isPHP(string $version): bool
     {
-        static $_is_php;
-        $version = (string)$version;
-        if (!isset($_is_php[$version])) {
-            $_is_php[$version] = version_compare(PHP_VERSION, $version, '>=');
-        }
-        return $_is_php[$version];
+        return version_compare(PHP_VERSION, $version, '>=');
     }
 
     /**
diff --git a/src/Legacy/Dbs.php b/src/Legacy/Dbs.php
index 355c903af..20cf24ad9 100644
--- a/src/Legacy/Dbs.php
+++ b/src/Legacy/Dbs.php
@@ -28,9 +28,9 @@ class Dbs
     /**
      * Dbs constructor
      *
-     * @param $cfg
+     * @param array $cfg
      */
-    public function __construct($cfg)
+    public function __construct(array $cfg)
     {
         $this->cfg = $cfg['db'];
         $this->alias = $cfg['db_alias'];
@@ -47,7 +47,7 @@ class Dbs
      *
      * @return mixed
      */
-    public function get_db_obj($srv_name_or_alias = 'db')
+    public function get_db_obj(string $srv_name_or_alias = 'db')
     {
         $srv_name = $this->get_srv_name($srv_name_or_alias);
 
@@ -61,11 +61,11 @@ class Dbs
     /**
      * Определение имени сервера
      *
-     * @param $name
+     * @param string $name
      *
      * @return mixed|string
      */
-    public function get_srv_name($name)
+    public function get_srv_name(string $name)
     {
         $srv_name = 'db';
 
diff --git a/src/Legacy/LogAction.php b/src/Legacy/LogAction.php
index 48faeff2f..3acd78e8e 100644
--- a/src/Legacy/LogAction.php
+++ b/src/Legacy/LogAction.php
@@ -39,10 +39,10 @@ class LogAction
     }
 
     /**
-     * @param $type_name
+     * @param string $type_name
      * @param array $args
      */
-    public function mod($type_name, array $args = [])
+    public function mod(string $type_name, array $args = [])
     {
         global $userdata;
 
@@ -88,10 +88,10 @@ class LogAction
     }
 
     /**
-     * @param $type_name
+     * @param string $type_name
      * @param array $args
      */
-    public function admin($type_name, array $args = [])
+    public function admin(string $type_name, array $args = [])
     {
         $this->mod($type_name, $args);
     }
diff --git a/src/Legacy/Select.php b/src/Legacy/Select.php
index e46e693c5..62b907a61 100644
--- a/src/Legacy/Select.php
+++ b/src/Legacy/Select.php
@@ -22,11 +22,10 @@ class Select
      * @param string $select_name
      * @return string
      */
-    public static function language($default_lang, $select_name = 'language')
+    public static function language(string $default_lang, string $select_name = 'language')
     {
         global $bb_cfg;
 
-        $lang_default = reset($bb_cfg['lang']);
         $lang_select = '<select name="' . $select_name . '">';
         $x = 0;
         foreach ($bb_cfg['lang'] as $key => $data) {
@@ -38,7 +37,7 @@ class Select
             $x++;
         }
         $lang_select .= '</select>';
-        return ($x > 1) ? $lang_select : $lang_default['name'];
+        return ($x > 1) ? $lang_select : reset($bb_cfg['lang']);
     }
 
     /**
@@ -49,7 +48,7 @@ class Select
      *
      * @return string
      */
-    public static function timezone($default, $select_name = 'timezone')
+    public static function timezone(string $default, string $select_name = 'timezone'): string
     {
         global $sys_timezone, $lang;
 
@@ -75,7 +74,7 @@ class Select
      *
      * @return string
      */
-    public static function template($default_style, $select_name = 'tpl_name')
+    public static function template(string $default_style, string $select_name = 'tpl_name')
     {
         global $bb_cfg;