Invalid or no certificate authority found, using bundled information

Question

I\'m getting started with the facebook API. I downloaded the example code from facebook, configured with my appID and secret keys.

Answer 1

Set the option in CURL to point to your certificate file

This option will tell CURL that your fb_ca_chain_bundle.crt file is in the same folder as your script.

Facebook::$CURL_OPTS[CURLOPT_CAINFO] = getcwd().'/fb_ca_chain_bundle.crt';

In base_facebook.php line 844 curl_exec fails and the error is generated. Then the script sets:

curl_setopt($ch, CURLOPT_CAINFO,
              dirname(__FILE__) . '/fb_ca_chain_bundle.crt');

and tries again.

The Second time all is well, there is no problem it just makes a mess of your log

DO NOT use

Facebook::$CURL_OPTS[CURLOPT_SSL_VERIFYPEER] = false;

Or a man-in-middle will be able to intercept your call!