controlling qBitTorrent from php

qBitTorrent.php

<?php
declare (strict_types = 1);
require_once('hhb_.inc.php'); // need hhb_curl from https://github.com/divinity76/hhb_.inc.php/blob/master/hhb_.inc.php
class QbitTorrent
{
    protected $username = "admin";
    protected $password = "123456";
    protected $url = "http://127.0.0.1:8080";
    /* @var hhb_curl $hc */
    public $hc;
    function __construct(string $username, string $password, string $url)
    {
        $this->username = $username;
        $this->password = $password;
        $this->url = $url;
        $this->hc = new hhb_curl('', true);
        $this->login();
    }
    function __destruct()
    {
        $this->logout();
        unset($this->hc); // appropriate time to destruct.
    }
    protected function login()
    {
        $hc = &$this->hc;
        $res = $hc->setopt_array(array(
            CURLOPT_URL => $this->url . '/api/v2/auth/login',
            CURLOPT_POST => 1,
            CURLOPT_POSTFIELDS => http_build_query(array(
                'username' => $this->username,
                'password' => $this->password,
            ))
        ))->exec()->getStdOut();
        $hcode = $hc->getinfo(CURLINFO_HTTP_CODE);
        if ($hcode === 403) {
            throw new \RuntimeException("login http 403: User's IP is banned for too many failed login attempts - {$res}");
        }
        if ($hcode !== 200) {
            throw new \LogicException("per API documentation the login response code will ALWAYS be either 200 or 403! but {$hcode} recieved! - response: {$res}");
        }
        $cookies = $hc->getResponseCookies();
        if (empty($cookies['SID'])) {
            throw new \RuntimeException("did not get authentication cookie when trying to log in!");
        }
        // logged in!
    }
    protected function logout()
    {
        $this->hc->setopt(CURLOPT_HTTPGET, 1)->exec($this->url . "/api/v2/auth/logout");
    }
    public function get_downloading_torrents():array{
        $this->hc->setopt_array(array(
            CURLOPT_HTTPGET=>1,
            CURLOPT_URL=>$this->url.'/api/v2/torrents/info?filter=downloading',
            
        ))->exec()->getStdOut();
    }
}
/* @var QbitTorrent $q */
$q;
init();

function init()
{
    error_reporting(E_ALL);
    hhb_init();
    stream_set_blocking(STDIN, true);
    $username = ask("WebUI username", "admin");
    $password = ask("WebUI password", "123456");
    $url = rtrim(ask("WebUI URL", "http://127.0.0.1:8080"), "\/");
    $q = new QbitTorrent($username, $password, $url);
}



function ask(string $question, string $default): string
{
    $shown_default = (empty($default) ? "emptystring" : "\"{$default}\"");
    echo "enter \"{$question}\" and press enter (or just press enter and it will default to {$shown_default} )\n";
    echo "{$question}: ";
    $ret = fgets(STDIN);
    $ret = trim($ret);
    if (!strlen($ret)) {
        $ret = $default;
    }
    echo "set to \"{$ret}\".\n";
    return $ret;
}