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Soon, Magicode.org will publish its first big open source project, SQLiteADM. It will make it as easy to work with SQLite databases as using phpMyAdmin to adminster MySQL databases is today.
A variable is a means of storing a value, such as a text string or a number. In PHP you do not have to declare your variable, as it's automatically declared when you set it. Since you do not need to declare the variable, you do not have to specify what kind of data it contains either.
If you have a web site or blog, it's important to spread the word, and what's better than a properly designed and updated RSS feed? Here's how to write a PHP script that fetches the last 10 items from your database and writes it to a RSS-file.