im-demo-server/app/Services/Base/BaseService.php

<?php

namespace App\Services\Base;

use App\Models\UserModel;

class BaseService
{
    protected $userId;
    protected $userInfo;
    protected static $instance;

    public function __construct()
    {
        $token = request()->header('token');
        $this->userId = $token;
        $this->userInfo = UserModel::where('id', $token)->first();
    }

    // 单例

    public static function getInstance()
    {
        if (!self::$instance instanceof self) {
            self::$instance = new self();
        }
        return self::$instance;
    }
}