PHP Tutorials — Image Manipulation

Today, most of websites use the RSS Feed with Feedburner to analyse and to count its readers. In this tutorial, I'll explain how create a custom RSS Feed button with the readers number. You'll use PHP with GD and XML.

How to Dynamically Create Thumbnails

One of the more surprising things you can learn about PHP is that it’s actually very useful when it comes to manipulating images of varying filetypes and formats. And a good thing too, since a lot of the internet is made up of pictures! The functionality of PHP in terms of image manipulation ranges from very simple resizing of images through to more complex effects and functions using image libraries such as ImageMagick

This tutorial will show you how to make a fully customizable CAPTCHA system.

Learn how to create a simple gallery to your site.

This tutorial will teach you how to align a text string so that it is in the center of your image vertically, horizontally or both.

In this tutorial I will show you how to store binary images (or any binary file) in MySQL using PHP.

The GD library in PHP offers some great tools for resizing and editing images. However, these can increase load time and it would be beneficial to enable client side caching of these resources. You can do this by adding one simple line of code to your image output.

Sometimes you want to display an image - but it's not stored in the right size. If you allow the browser to resize the image, it will get distorted and waste bandwidth. Instead, you can use the PHP GD library to resize the image on the fly. This tutorial will show you how to use the GD library to read an image, resize it, and output it as part of an HTML page.

Using JavaScript, PHP and the GD library, we are going to draw a bar chart showing the binomial distribution for 0 to 10 successes out of 10 trials based upon the probability for success entered by the user in a form.