More, now than ever, websites need fast response times and be able to cope under load. As web pages contain more and more dynamically generated content, the challenge is on for PHP developers to develop efficient caching solutions. This presentation will focus on using caching techniques that can be used in a PHP project to increase the performance of a web site. We will look at a variety of caching techniques, showing practical implementations and before and after statistics. We will also cover the cache storage options available and when you might use one over another. We will also address how to get browsers to cache content for us using HTTP headers.