symbol names and using #defines can cause conflicts.
…M status page
CURLINFO_CERTINFO is available since 7.19.1. The cURL extension allow to use it since this same version but the internal function create_certinfo used internally for CURLINFO_CERTINFO usage is only usable for version greater than 7.19.1 which will cause problem if the user is using the 7.19.1 cURL version
This was updated according to the cURL symbol tables located here : http://curl.haxx.se/libcurl/c/symbols-in-versions.html
CURLINFO_PRIMARY_* and CURLINFO_LOCAL_* where available in curl_getinfo but the constant itself was not exposed to php userland