测试

app/Services/Base/BaseService.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Services\Base;
+
+class BaseService
+{
+    protected $userId;
+    protected static $instance;
+
+    public function __construct()
+    {
+        $token = request()->header('token');
+        $this->userId = $token;
+    }
+
+    // 单例
+
+    public static function getInstance()
+    {
+        if (!self::$instance instanceof self) {
+            self::$instance = new self();
+        }
+        return self::$instance;
+    }
+}