Below are some code samples from the last six years of web development. All of the files are in zip format and are well commented. The first two classes are pulled from 'classes.php', which is a collection of classes that I have reused on several projects, and which is available on request.

Object Oriented PHP 4 class - inserts into a database table
Object Oriented PHP 4 class - creates an input file field
Login Processor - starts a session and chekcs user entered data for validity
PHP Robot - parses a comma delimited file and inserts data into mysql