Anybody that codes a script that accepts user input and inserts data into a sql database must make sure the database's integrity is protected. I have read book that teach PHP that don't even address this necessary, critical subject. Imagine the valuable data in your databases is butchered or even wiped out completely. Is your database safe from SQL injection attacks?

Do you want to encourage your visitors to say hi when they visit your friendly Website? This tutorial is divided in 4 phases and will teach you how to create a simple PHP guestbook using only one PHP file.

No more database-dependent SQL queries, no more external library integration. At last, PHP developers will not dream of Lucene anymore. They can develop their own search engine, with results ordered by relevancy and smart indexing.

A tutorial and guide on how to dynamically resize pictures using PHP. Includes all source code necessary with comments and performance tips

An RSS feed is a great way to serve up your content to users. However, if you're not using a standard CMS or blogging platform you may not have an RSS feed generated for you automatically. This tutorial will show you how to create an RSS feed in a few simple steps. If you can query your database to get information about your articles, you can complete this tutorial and build a custom feed.