An Introduction to Classes

This tutorial teaches you how to write and use classes, to make your PHP code more flexible and easier to manage. The tutorial guides you through the construction of a simple, security-related class that performs some basic security functions for a web site: checking user logons. The class implements security features that answer some needs for a number of current security models and could be easily implemented at most dynamic Web sites. Note that this class does not provide a full security solution.

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