Bramus\Router\Router::getRequestMethod PHP Method

    public function getRequestMethod()
    {
        // Take the method as found in $_SERVER
        $method = $_SERVER['REQUEST_METHOD'];
        // If it's a HEAD request override it to being GET and prevent any output, as per HTTP Specification
        // @url http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.4
        if ($_SERVER['REQUEST_METHOD'] == 'HEAD') {
            ob_start();
            $method = 'GET';
        } elseif ($_SERVER['REQUEST_METHOD'] == 'POST') {
            $headers = $this->getRequestHeaders();
            if (isset($headers['X-HTTP-Method-Override']) && in_array($headers['X-HTTP-Method-Override'], array('PUT', 'DELETE', 'PATCH'))) {
                $method = $headers['X-HTTP-Method-Override'];
            }
        }
        return $method;
    }