simply test two selenium servers

browsertest.php

<?php

error_reporting(E_ALL);
ini_set('display_errors', true);

chdir(__DIR__);

if (!file_exists('vendor/autoload.php')) {
    echo 'Please run:' . PHP_EOL;
    echo 'composer require facebook/webdriver' . PHP_EOL;
    //echo 'composer require dzentota/chrome-dev-tools dev-master' . PHP_EOL;
    exit(1);
}

require 'vendor/autoload.php';

use Facebook\WebDriver\Remote\DesiredCapabilities;
use Facebook\WebDriver\Remote\RemoteWebDriver;

$driver2 = RemoteWebDriver::create('http://localhost:4444/wd/hub', DesiredCapabilities::firefox());
$driver3 = RemoteWebDriver::create('http://localhost:4445/wd/hub', DesiredCapabilities::firefox());

$driver2->get($_SERVER['argv'][1]);
$driver3->get($_SERVER['argv'][1]);

echo 'Driver #2: ' . $driver2->getTitle() . PHP_EOL;
echo 'Driver #3: ' . $driver3->getTitle() . PHP_EOL;

$driver2->takeScreenshot('test-2.png');
$driver3->takeScreenshot('test-3.png');

# cleanup
$driver2->quit();
$driver3->quit();
unset($driver2, $driver3);