magento 2: get url query string

Question

What is the magento 2 equivalent of $_SERVER['QUERY_STRING']

I want to retrieve the full query string from the url and would like to do this using the framework's built in functions.

Answer 1

I was able to achieve this using the getServer() in the \Magento\Framework\HTTP\PhpEnvironment\Request class

public function __construct
(
    \Magento\Framework\HTTP\PhpEnvironment\Request $request,
)
{
    $this->request = $request;
}

public function execute()
{
    \Zend_Debug::dump($this->request->getServer('QUERY_STRING'));
    die;
}

If no argument is set, $this->request->getServer() will return complete $_SERVER array