Learning HTTP Caching and PHP (27th February 2007)

In short: it’s way out of my league but I’ve got something with basically works. It seems you have to know all the following (and maybe even more) before you even get started:

HTTP 304: Not Modified by Anne van Kesteren was also helpful. I now understand enough to make PHP generated pages just about work with HTTP caching.

Testing with Web Sniffer was the most help:

They return a 304 Not Modified response status without sending the page if:

I ’ve only applied this to the Calthorpe Park School test site. I don’t think it is a complete implementation and it’s very messy. It’s working with the caching Firefox and Internet Explorer 6 do but I want to do more testing and tidying before I show it on any forums.