Create a copy of an image as a thumbnail

You get a great function that use the GD library to create the new thumbnail file. Often you need to change the size/dimensions of images in your web site. One example could be if you let your visitors upload an image of themself when they register. For different reasons it could be important to make sure the images have a specific size, so they don't mess upp the design of your layout. Another example could be if you have a photo gallery for your self, then it's nice to have the same size for images. Together with standard PHP installations you get something that is called GD. This package is made for creating and modifying images directly from PHP.