Iwan Luijks has written up the first part in a series looking at using the Enchant extension - an interface to other third-party spell-checking APIs.

PHP 5.3 introduced us to some new bundled extensions, including Enchant. The Enchant extension is a binding for the Enchant library. Note: Before PHP 5.3, Enchant was available as optional extension through PECL. This article however only covers the setup and usage of the bundled extension in PHP 5.3 This short tutorial gives an introduction to setting up and using this new extension for your PHP projects.

He talks a bit about what Enchant is and what it allows you to do (including releasing you from the language-specific dependencies of Aspell). Instructions on installing and using the extension are also included as well as a sample code snippet showing its use (checking a string against installed dictionaries). Since the dictionary installation isn't exactly intuitive, he gives an overview of where to grab them and how to set them up for your installation.