headers - An associative array of HTTP headers and values to be included in every request. parameters - An associative array of URL or body parameters to be included in every request. curl_options - cURL options to apply to every request; anything defined here: https://secure.php.net/manual/en/function.curl-setopt.php. These will override any automatically generated values. build_indexed_queries (bool) - http_build_query automatically adds an array index to repeated parameters which is not desirable on most systems. Use this option to enable the default behavior. Defaults to FALSE. user_agent - User agent string to use in requests. base_url - URL to use for the base of each request. format - Format string is appended to resource on request (extension), and used to determine which decoder to use on response; a request URL like "api.twitter.com/1.1/statuses/user_timeline.json" would be expected to return well-formed JSON. format_regex - Pattern to extract format from response Content-Type header, used to determine which decoder to use on response. decoders - Associative array of format decoders. See "Direct Iteration and Response Decoding". username - Username to use for HTTP basic authentication. Requires password. password - Password to use for HTTP basic authentication. Requires username. url (string) - URL of the resource you are requesting. Will be prepended with the value of the base_url option, if it has been configured. Will be appended with the value of the format option, if it has been configured.