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

<?php

namespace App\Services\Base;

use App\Models\UserModel;

class BaseService
{
    protected $userId;
    protected $userInfo;
    protected $gatewayClient;
    /**
     * @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()
    {
        $token = request()->header('token');
        $this->userId = $token;
        $this->userInfo = UserModel::where('id', $token)->first();
    }

    /**
     * 获取实例
     * @return null|static
     */
    public static function getInstance(): null|static
    {
        $name = get_called_class();
        if (!isset(self::$_instance[$name])) {
            self::$_instance[$name] = new static();
        }

        return self::$_instance[$name];
    }
}