An IP address is an unique id for your PC when you are on the internet, and in most cases you are stuck with each other. The only exception is if your ISP is assigning the IP to you through DHCP (Dynamic Host Configuration Protocol), which means that you have a different one every time. Let's see two efficient methods of finding out your IP address. ...

In the first part of this article I've explained the basics of sessions and how they can be used. It is now time to see how we can implement these theories and create a functional session management system using a database. ...

A histogram is: a graphical display of tabulated frequencies. In our case, color frequencies that appear in an image. In some image manipulation software this can be named also as Levels. ...

Thumbnails are small previews of images you have in different folders on your computer. If you don't like them, they can be disabled. Just check out this article: Remove previews from Windows Explorer. The size of the thumbnails is a default one, and it can not be modified by normal methods. ...

Although converting an image (usually in true color) to grayscale can sound like a simple operation if you are used to image processing software, PHP doesn't have a function for this conversion by default. ...