PHP: A tutorial.

There are a number of them out there.

• APC - open source

• IonCube Accelerator - free, but closed source

• Zend Cache - commercial

Installation

Typically very trivial. For IonCube, for example, in your php.ini add:

zend_extension = "/usr/local/lib/php/php_accelerator_1.3.3r2.so"