cuspsr/Core/User.php

<?php
namespace Core;

class User{
    protected $db;

    public function __construct()
    {
        $this->db = new \Core\Databases\Mysqli();
        $this->db->connect('39.100.75.63:33060', 'root', 'mysql57-2020!d', 'prictice');
    }

    public function getUserById($id)
    {
        $res = $this->db->query("select * from test where id=".$id)->fetch_all(MYSQLI_ASSOC)[0];
        $this->id = $res['id'];
        $this->name = $res['name'];
        $this->mobile = $res['mobile'];
        $this->regtime = $res['regtime'];
        return $this;
    }

    public function save()
    {
        $sql = "update test set name = '{$this->name}',mobile = '{$this->mobile}',regtime = '{$this->regtime}' where id = '{$this->id}'";
        $this->db->query($sql);
    }

    public function getIds()
    {
        return $this->db->query("select id from test")->fetch_all(MYSQLI_ASSOC);
    }
}