Code smell.

classes/Battles/Clan.php

@@ -7,7 +7,7 @@ use Battles\Models\User\Effects;
 
 class Clan
 {
-    private static ?self $_instance = null;
+    private static ?self $instance = null;
     private $clan;
 
     private function __construct()
@@ -17,10 +17,10 @@ class Clan
 
     public static function getInstance(): self
     {
-        if (is_null(self::$_instance)) {
-            self::$_instance = new self();
+        if (is_null(self::$instance)) {
+            self::$instance = new self();
         }
-        return self::$_instance;
+        return self::$instance;
     }
 
     public function addMember(string $login): string
@@ -46,6 +46,11 @@ class Clan
         return "Персонаж «{$login}» успешно принят в клан.";
     }
 
+    private function getProverka($userId)
+    {
+        return Effects::count($userId, 20);
+    }
+
     public function removeMember(string $login): string
     {
         $error = null;
@@ -96,11 +101,6 @@ class Clan
         return Db::getInstance()->fetchAll('select id, (select 1 from clans where short_name = clan and owner_id = id) as clan_owner, room from users where clan = ? order by clan_owner desc, room, login', User::getInstance()->getClan());
     }
 
-    private function getProverka($user_id)
-    {
-        return Effects::count($user_id, 20);
-    }
-
     public function getClanOwnerId(): ?int
     {
         return $this->clan->owner_id;
@@ -115,4 +115,4 @@ class Clan
     {
         return $this->clan->short_name;
     }
-}
+}