测试

app/Services/Base/BaseService.php

@@ -8,7 +8,10 @@ class BaseService
 {
     protected $userId;
     protected $userInfo;
-    protected static $instance;
+    /**
+     * @var mixed 单例实例，确保该类只有一个全局实例
+     */
+    private static mixed $_instance;
 
     public function __construct()
     {
@@ -17,13 +20,17 @@ class BaseService
         $this->userInfo = UserModel::where('id', $token)->first();
     }
 
-    // 单例
-
-    public static function getInstance()
+    /**
+     * 获取实例
+     * @return null|static
+     */
+    public static function getInstance(): null|static
     {
-        if (!self::$instance instanceof self) {
-            self::$instance = new self();
+        $name = get_called_class();
+        if (!isset(self::$_instance[$name])) {
+            self::$_instance[$name] = new static();
         }
-        return self::$instance;
+
+        return self::$_instance[$name];
     }
 }