Restagent\Request::head PHP Method

    public function head($uri)
    {
        curl_setopt($this->curl, CURLOPT_HEADER, 1);
        $full_url = $this->get_full_url($uri);
        curl_setopt($this->curl, CURLOPT_URL, $full_url);
        curl_setopt($this->curl, CURLOPT_CUSTOMREQUEST, 'HEAD');
        curl_setopt($this->curl, CURLOPT_NOBODY, true);
        // $this->headers is an associative array, to allow for overrides in set(), but
        // curl_setopt() takes indexed array, so we need to convert.
        $idxed_headers = array();
        foreach ($this->headers as $name => $value) {
            $idxed_headers[] = "{$name}: {$value}";
        }
        curl_setopt($this->curl, CURLOPT_HTTPHEADER, $idxed_headers);
        if (!empty($this->data) && is_array($this->data)) {
            $data = http_build_query($this->data);
            $this->header('Content-Length', strlen($data));
            curl_setopt($this->curl, CURLOPT_POSTFIELDS, $data);
        }
        $response = curl_exec($this->curl);
        //reset defaults to allow clean re-use of the request object
        $this->data = array();
        $this->headers = array();
        $this->method = '';
        // Restore default values
        curl_setopt($this->curl, CURLOPT_NOBODY, false);
        curl_setopt($this->curl, CURLOPT_HEADER, false);
        if (function_exists('http_parse_headers')) {
            $headers = http_parse_headers($response);
        } else {
            $headers = $this->_http_parse_headers($response);
        }
        return array('code' => curl_getinfo($this->curl, CURLINFO_HTTP_CODE), 'meta' => curl_getinfo($this->curl), 'data' => $headers);
    }