If you want to speed up your website, a good option (apart from code optimisation, HTTP request reduction and the likes) is to enable opcode caching on the server. Most blogs and other dynamic websites on the internet run with PHP. There are many PHP accelerators and APC is open source, pretty easy to install and has many configuration options.
Windows Cache Extension for PHP is a PHP accelerator that is used to increase the speed of PHP applications running on Windows and Windows Server. Once the Windows Cache Extension for PHP is enabled and loaded by the PHP engine, PHP applications can take advantage of the functionality without any code modifications. Continue reading
There are many types of caching mechanisms like memcached, APC, eAccelerator but for the simplicity of this tip, we will use plain file to hold our cache data. This is enough in most of cases.