Selenium PHP Chrome Webdriver Issue - php

Question

I'm trying to get started using Selenium with Chrome, i've had no previous trouble dealing with Selenium+Firefox, but i cannot seem to launch a Chrome browser now - every time I try, a Firefox browser appears instead.
Here is my setup:
$web_driver = new ChromeDriver("C:\chromedriver\chromedriver.exe");
$session = $web_driver->session('chrome');
I realise the first line is likely not to be correct. But i cannot think of how else to initiate Chrome.
Note: I have already downloaded the chrome web driver.
Here are the sources i used:
http://edvanbeinum.com/using-selenium-2-phpunit-to-automate-browser-testing
https://code.google.com/p/selenium/wiki/ChromeDriver
Many thanks.

Answer 1

Try using
$session = $web_driver->session('googlechrome');
instead of
$session = $web_driver->session('chrome');

Answer 2

You might want to take a look here and here.
$host = 'http://localhost:4444/wd/hub'; // this is the default
$capabilities = DesiredCapabilities::htmlUnitWithJS();
{
// For Chrome
$options = new ChromeOptions();
$prefs = array('download.default_directory' => 'c:/temp');
$options->setExperimentalOption('prefs', $prefs);
$capabilities = DesiredCapabilities::chrome();
$capabilities->setCapability(ChromeOptions::CAPABILITY, $options);
}
$driver = RemoteWebDriver::create($host, $capabilities, 5000);