Without knowing the fundamental concepts related to time measurement it’s very easy to make mistakes. This guide starts from the beginning explaining how UTC was born and how it actually works, and then moving into the practical PHP programming techniques and functions and explaining how to use them properly.

In this post you will find a simple introduction to Sessions with some examples on how to use them, a more in depth analysis of the most important functions and some facts about security that you should be aware of.

JSON is a frequently used format in server-to-server and client-to-server data exchange connections like AJAX. PHP natively supports encoding and decoding of JSON strings, and in this tutorial we will see how this is done with a concrete example.

PHP is often associated with HTML code generation, but it can also be used as a background application for handling and analysing data and for operations like database clean up, email and messages retrieval and statistical data analysis. How do these kind of scripts work and how do you make one?

PHP has some different tools for dealing with XML files. In this post we will see how to create a new XML document from scratch using three different PHP extensions: SimpleXML, XMLWriter and DOM. Which one is best for you?