/** * Build the LTI request using LTI params passed in as arguments * * @param string $url * @param string $method * @param array $params * * @return string */ public function buildRequestUrl($url, $method, $params) { $params['lti_version'] = $this->getVersion(); $request = new OAuth\Request($this->consumer, $url, $method, $params); return $request->signRequest($this->signatureMethod); }