Как реализовать прокси чекер для cURL?

class HttpProxyList
{
    /**
     * @param array[] список прокси серверов `[host: string, port: int]`
     */
    private array $proxyList = [];

    public function __construct(array $proxyList)
    {
        $this->proxyList = $proxyList;
    }

    protected function checkProxy(string $host, int $port): bool
    {
        $errorCode = $errorMessage = null;
        try {
            $handler = fsockopen($host, $port, $errorCode, $errorMessage, 3);
            if ($handler !== false) {
                fclose($handler);
                return true;
            }
        } catch (Throwable $e) {
            error_log("Proxy server '$host:$port' not available: $errorMessage [$errorCode]"):
        }

        return false;
    }

    public function getActiveProxy(): ?array
    {
        foreach ($this->proxyList as $key => $proxy) {
            if ($this->checkProxy($proxy['host'], $proxy['port'])) {
                return $proxy;
            }
            unset($this->proxyList[$key]);
        }

        return null;
    }
}