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The HTTP Authentication hooks in PHP are only available when it is running as an Apache module and is hence not available in the CGI version. In an Apache …

What’s a cookie you ask? Cookies are little pieces of text that are sent to a user’s Web browser. Cookies can help you create shopping carts, user communities, …

Introduction In the last Code Gallery Spotlight, we examined a PHP class that performed very simple data caching. This time around we are going to explore the …

Introduction Whether you are retrieving information from a database or grabbing news headlines from another site, properly used caching can help reduce the run …

Introduction RDF Site Summary documents, or RSS, are an easy way to syndicate content onto your web site. More and more web sites are offering RSS feeds of …

Every user expects a search engine on any Web site they visit. Unfortunately, search engines are extremely complex to develop. They require massive amounts of …

Web site authentication applies to most Web sites on the Internet. Implementation of authentication schemes, however, can vary significantly from one site to …

Introduction If you’re a developer, I’m sure you’ve experienced an error message in PHP. In fact, you should be quite familiar with the standard error message …

This is used in some scripts to check for security. You mustn’t use this as a security check, as it is very easily spoofed. See here for how to secure your Perl …

Stopping the most common attack: Ok well, one of the easiest ways of getting superuser access is through anonymous ftp access into a webpage. This can easily be …

Web browsers are leaky faucets that are revealing email address, web sites you’ve entered, search queries and other information. This absolute invasion of your …

Public areas that offer access to the Internet (airports, open wireless networks, etc.) have no security in place. If you’re at a public WiFi spot, your …