I was using this on a project that requires SSL and when I used gChart it came back with security issues.
In looking into it I noticed that this used the old API path chart.apis.google.com which can't use HTTPS.
So I replaced that with the newer url and changed the full url calls to https and it worked well so far. The example page all seemed to work fine. I am sure there are some things that need to be added to take advantage of the API fully. However it is a quick fix if anyone needs to use it with the HTTPS requirement.
I was using this on a project that requires SSL and when I used gChart it came back with security issues.
In looking into it I noticed that this used the old API path chart.apis.google.com which can't use HTTPS.
So I replaced that with the newer url and changed the full url calls to https and it worked well so far. The example page all seemed to work fine. I am sure there are some things that need to be added to take advantage of the API fully. However it is a quick fix if anyone needs to use it with the HTTPS requirement.