PHP - SSL certificate error: unable to get local issuer certificate

Question

I'm running PHP Version 5.6.3 as part of XAMPP on Windows 7.

When I try to use the Mandrill API, I'm getting the following error:

Uncaught exception 'Mandrill_HttpError' with message 'API call to messages/send-template failed: SSL certificate problem: unable to get local issuer certificate'

I already tried everything I read on StackOverflow, including adding the following to the php.ini file:

curl.cainfo = "C:\xampp\php\cacert.pem"

And ofcourse downloaded to that location the cacert.pem file from http://curl.haxx.se/docs/caextract.html

but after all that, restarted XAMPP and Apache server but still getting the same error.

I really don't know what else to try.

Can anyone advise on what else can I try?

Answer 1

Finally got this to work!

1. Download the certificate bundle.

2. Put it somewhere. In my case, that was c:\wamp\ directory (if you are using Wamp 64 bit then it's c:\wamp64\).

3. Enable mod_ssl in Apache and php_openssl.dll in php.ini (uncomment them by removing ; at the beginning). But be careful, my problem was that I had two php.ini files and I need to do this in both of them. One is the one you get from your WAMP taskbar icon, and another one is, in my case, in C:\wamp\bin\php\php5.5.12\

4. Add these lines to your cert in both php.ini files:

   curl.cainfo="C:/wamp/cacert.pem"
   openssl.cafile="C:/wamp/cacert.pem"
   

5. Restart Wamp services.