If you want to learn new things in php like to check username is available or not on website using Ajax and Jquery. So you are at right place to learn this things in very simple step. You can learn by video or by text tutorial also.

In this tutorial you can find how to create simple Image using PHP with GD Library. You can create dynamic image. If you want to create image for captcha code, this tutorial will be helpful to you. You can also use for other purpose also. e.g. Create dynamic image from text etc.