run ssh commands on remote server via php

<?php

/*
 * Class to connect to remote server via SSH.
 *
 * Requires phpseclib/phpseclib package which can be imported via composer.
 */

namespace AgentsApp\Libs;

use phpseclib\Crypt\RSA;
use phpseclib\Net\SSH2;

class Ssh
{
    private $ssh;

    public function __construct(string $host, int $port)
    {
        $this->ssh = new SSH2($host, $port);

        $this->ssh->setTimeout(0);
    }

    /**
     * Login via username and password.
     *
     * @param string $username
     * @param string $password
     * @throws SshException
     */
    public function login(string $username, string $password)
    {
        if (!$this->ssh->login($username, $password)) {
            throw new SshException(__CLASS__ . ' : ' . 'Could not login!');
        }
    }

    /**
     * Login via username and SSH key.
     *
     * @param string $username
     * @param string $keyPath
     * @throws SshException
     */
    public function loginUsingKey(string $username, string $keyPath)
    {
        $key = new RSA();
        $key->loadKey(file_get_contents($keyPath));

        if (!$this->ssh->login($username, $key)) {
            throw new SshException(__CLASS__ . ' : ' . 'Could not login!');
        }
    }

    /**
     * Login via username and password-protected SSH key.
     *
     * @param string $username
     * @param string $password
     * @param string $keyPath
     * @throws SshException
     */
    public function loginUsingKeyPassword(string $username, string $password, string $keyPath)
    {
        $key = new RSA();
        $key->setPassword($password);
        $key->loadKey(file_get_contents($keyPath));

        if (!$this->ssh->login($username, $key)) {
            throw new SshException(__CLASS__ . ' : ' . 'Could not login!');
        }
    }

    /**
     * Runs a command
     *
     * @param string $command
     * @return mixed
     */
    public function run(string $command)
    {
        return $this->ssh->exec($command);
    }

    /**
     * Runs a command live and outputs results.
     *
     * @param string $command
     *
     * @param $isBrowser
     * @return mixed
     */
    public function runLive(string $command, $isBrowser = false)
    {
        $this->ssh->exec($command, function ($output) use ($isBrowser) {
            if ($isBrowser) {
                echo "<pre>$output</pre>";
                flush();
                ob_flush();
                sleep(1);
            } else {
                echo $output;
            }
        });
    }

    /**
     * Runs multiple commands at once
     *
     * @param array $commands
     * @return mixed
     */
    public function runMany(array $commands)
    {
        // 'set -e' to stop on first error
        $commands = 'set -e;' . implode(';', $commands);

        return $this->run($commands);
    }

    public function isConnected(): bool
    {
        return $this->ssh->isConnected();
    }

    public function isTimeout(): bool
    {
        return $this->ssh->isTimeout();
    }

    public function getLog()
    {
        return $this->ssh->getLog();
    }

    /**
     * Dynamically call the actual SSH2 client.
     *
     * @param string $method
     * @param array $parameters
     * @return mixed
     */
    public function __call($method, $parameters)
    {
        return $this->ssh->{$method}(...$parameters);
    }

}

class SshException extends \Exception
{
}