This chapter shows you how to create and manipulate images such as GIFs and JPEGs. You won't be able to write scripts for heavy-duty image manipulation or processing such as online character recognition (your webserver limits the amount of computation that one script can do), but there are many small image operations that are very handy when developing a website.

#66: Creating a CAPTCHA (Security) Image

Because many examples in this book use cURL to connect to and interact with websites, you know how easy it is to automate interactions with websites. You also know that if you have a site feature that you want no one ...

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