cf-platform/Application/Base/Service/UserService.class.php

<?php
namespace Base\Service;

use Base\Facade\Request;

class UserService
{

    public function isAccountExist($account)
	{
        $user = M('user', 'tab_')->where(['_logic' => 'or', 'account' => $account, 'phone' => $account])->find();
        if ($user) {
            return true;
        }
        return false;
    }
    
}