curl_init
curl_copy_handle
curl_version
curl_setopt
curl_setopt_array
curl_exec
curl_getinfo
curl_error
curl_errno

curl_close
curl_multi_init
curl_multi_add_handle
curl_multi_remove_handle
curl_multi_select
curl_multi_exec
curl_multi_getcontent
curl_multi_info_read
curl_multi_close