cURL error: SSL certificate problem: self signed certificate in certificate chain

[mattheworiordan]

A number of customers have reported certificate errors in Windows environments. This is caused by the root certificates on the local machine being out of date. This is similar to problems we've seen in our Ruby client, see ably/ably-ruby#87.

The resolution to this problem is to update your local root certificates to the latest. Follow these instructions:

1 Download the following pem file: http://curl.haxx.se/ca/cacert.pem

2 Copy this file to either c:\cert\cacert.pem (Windows) or any other path on your Unix/ Linux / Mac installation

3 Open php.ini file in your favorite editor

If the following configuration string: curl.cainfo exists in your php.ini, please uncomment it by removing ";" and modify the path in order to point it to the cacert.pem file attached to this e-mail, e.g:

;;;;;;;;;;;;;;;;;;;
; Module Settings ;
;;;;;;;;;;;;;;;;;;;

curl.cainfo=c:\cert\cacert.pem