curl_easy_option_by_id - find an easy setopt option by id

Added in curl 7.73.0

Given a CURLoptionid, 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_ prefixed ones provided in the standard curl/curl.h header file. This function returns the non-alias version of the cases where there is an alias function as well. If libcurl has no option with the given id, this function returns NULL.

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

curl_easy_option_by_id - find an easy setopt option by id

This functionality affects all supported protocols

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

curl_easy_option_by_name(3), curl_easy_option_next(3), curl_easy_setopt(3) libcurl 2025-06-16 curl_easy_option_by_id(3)

#include <curl/curl.h> const struct curl_easyoption *curl_easy_option_by_id(CURLoption id);