The XML_XPath PEAR Class allows easy manipulation, maneuvering, and querying of a domxml tree using both xpath queries and DOM walk functions. It uses an internal pointer for all methods on which the action is performed. Results from an xpath query are returned as an XML_XPath_Result object, which contains all the DOM functions from the main object. This class tries to stay as close as possible to the DOM Recommendation. It is important to note that this is only an interface for the PHP domxml library. It depends on that library available (--with-dom) and hence requires PHP 4.2.1. This class is useful if you are looking for a fast implementation to XML documents.
PHPresolver is a DNS resolver library written in pure PHP. It may help you code email address validity verification under the Win32/BeOS port of PHP because the current version has no support for DNS-related functions such as getmxrr() or checkdnsrr(). In addition, the library partially supports IPv6 address resolution.
Table Class allows you to create highly dyanamic HTML tables easily and quickly. It supports CSS, any number of arbitrary tags, and creating tables inside tables. This class is useful for implementing intensive reporting features. Table Class is faster than using and parsing traditional HTML templates because the class works completely in memory, storing all the table data in several comprehensive arrays, while not compiling to HTML until you want it to. This allows for dynamic editing of any attribute of any element. Rows and columns can be easily added and subtracted at any time, and row contents can be added simply by passing an array.
PHP Command Class is a PHP class that is allows one to create a single index page that is controlled using a command and sub-command pair. The command and sub-command are stored in a database for quick lookup, and they can be used for creating menus. This class is designed to use MySQL, but any database that has an API for PHP can be used by using the correct database class to handle the queries. Full documentation and comments can be found in the code.