curl_easy_option_by_id - Man Page

find an easy setopt option by id


#include <curl/curl.h>

const struct curl_easyoption *curl_easy_option_by_id(CURLoption id);


Given a CURLoption id, this function returns a pointer to the curl_easyoption struct, holding information about the curl_easy_setopt(3) option using that id. The option id is the CURLOPT_ prefix ones provided in the standard curl/curl.h header file. This function will return the non-aliases version for the cases where there is an alias function as well.

If libcurl has no option with the given id, this function returns NULL.


const struct curl_easyoption *opt = curl_easy_option_by_id(CURLOPT_URL);
if(opt) {
  printf("This option wants type %x\n", opt->type);


This function was added in libcurl 7.73.0

Return Value

A pointer to the curl_easyoption struct for the option or NULL.

See Also

curl_easy_option_by_name(3),curl_easy_option_next(3), curl_easy_setopt(3),

Referenced By

curl_easy_option_by_name(3), curl_easy_option_next(3), curl_easy_setopt(3).

January 02, 2023 libcurl 7.88.1 libcurl Manual