The following script is a single interface for pre-validating any HTML form. It lets you validate your form data the way you want, while handling the rudimentary tasks itself.

1) Change just one variable to make it work with $_GET or $_POST or $_REQUEST.

2) Name which elements are 'required' all at once in a hidden HTML text input.

3) Easily provide field descriptions in hidden HTML text inputs that you can use to print error statements.

4) Call a single function to print out error statements that you can easily style with CSS.

5) It automatically checks if fields marked 'required' have been filled out.

Most of the pre-validation code is from PHP 5: Unleashed by Sams Publishing. I found it extremely useful for a recent project. Sharing it here, I removed some unnecessary functions, and tried to simplify some points.

All the comments are my own; hopefully I provided more than enough explanation.

A simple MySQL class for use in PHP.
Feel free to suggest improvements.

This is a simple cookie object that handles some of the basic cookie functions and which is kind of like a simple cookie-object parser.

Hope you like it.

Don't know if anyone will find this handly, but here's a CSS processor that I wrote that allows me to nest CSS Blocks, and various other things, making for an easier to maintain CSS file.

Warning: I'd recommend caching the results since I didn't have a need to optomize it for speed.

Things that it includes:
*Nested CSS Rules
*Removes Whitespace
*Allows for // comments
*Removes comments (so put them in at no cost)

Please let me know what you think

Rather than have standalone functions rtrim, ltrim, and trim (as in http://www.bytemycode.com/snippets/snippet/397/) why not have them as methods of all string objects?

libNog is a 9k library to provide somewhat easier browser-independence. It is not yet complete, and will be continuously revised. It grew from this snippet, and is still growing as I find things I use often.
Presently, libNog features:

A way to browser-independently get an XMLHttpRequest object.
A set of simple methods for GET, POST, HEAD, and to include other Scripts.
Simple methods for className control
A completely abstracted form of getElement*
Browser-independent methods for attaching and detaching event handlers
An event-normalization routine
A simple one-command 'Stop the Event' routine
And the big one: A simplified Class object by which classes can be built in JavaScript.

The above link will point you to the API documentation and history of libNog, as well as where to download the library.

Return object by type. Revision 2.

Return object by type

Remove all children of Object.

I like to have these two methods in my toolbelt, even though it's syntactic sugar, I think it aids clarity.