phalidate is a set of classes used in data validation. Data can come from an HTML form or other source. It is designed to work with or without a templating engine like Smarty, to be extensible, and easily changed. It also has support for localized error messages (currently English, Spanish, and German).
WebNavigationFramework (wnf) is a framework to design a Web site. It is meant for authors and rapid application developers. It has a powerful navigation tree in which each node has lots of properties. The wnf offers a lot of classes (session, user, permissions, db), multilingual-support, a search mechanism, and contact information (from the node property).
disknavigator is a PHP class that is meant to browse a given directory on a server's file system. It can also perform several types of manipulations of the files within the directory. It can change permissions, retrieve the total size of all the files, create new files or sub-directories, and remove files or directories.
class_google.php is meant to connect to Google and perform a query. It lets you specify the query parameters as in the advanced search page of Google, and connects to Google via HTTP and retrieves the contents of the results page. It also parses the results to obtain the number of occurrences found for the specified query. The class requires PHP with TCP socket connection support enabled.
class_cache.php is a class for caching arbitrary data about files in a given folder. It is intended to be used to reduce the time taken to serve dynamically generated pages. It works by checking if a cache file with a given key exists and is not older the cache expiration period. If it does not exist or has expired, the data is stored in a cache file. Otherwise, the data is retrieved from the cache file. MD5 sums are used to generate the names of the files on which the cached data is stored.
arraymanip is a PHP class for manipulating data in arrays. It is capable of moving elements from one position to another, deleting elements, and inserting elements in specific positions. It supports mixed indexed arrays, although this isn't recommended. By default it works with integer indexed arrays.
HN CAPTCHA is a PHP class that generates a picture to use in forms that perform CAPTCHA tests (Completely Automated Public Turing to tell Computers from Humans Apart). After the test form is submitted, a key entered by the user in a text field is compared to determine whether it matches the text in the picture. It is a fork of ocr_captcha that features support for older versions of the GD library, hacking prevention, optional use of Web safe colors, support for the use of multiple random TrueType fonts, and more.