battles/classes/Battles/Check.php

<?php
# Date: 15.03.2021 (21:53)

namespace Battles;

use Battles\Database\Db;

class Check
{
    private User $user;
    private Db $db;

    /**
     * Check constructor.
     *
     * @param User $user
     * @param Db   $db
     */
    public function __construct(User $user, Db $db)
    {
        $this->user = $user;
        $this->db = $db;
    }

    public static function expiredEffects()
    {
        return Db::getInstance()->execute('delete from users_effects where remaining_time <= ?', strtotime('now'));
    }

    public static function userExists($id): bool
    {
        return Db::getInstance()->fetchColumn('select count(*) from users where id = ?', $id) > 0;
    }
}