... more about the PHP programming language. Plug- in LicenseYou are free to use any of the plug- ins in this book in your own projects, and may modify them as necessary, without attributing this book—although ... of problems including processing text in a variety of ways, uploading and manipulating images, server content management, form handling, user input validation, chat and messaging, user authentication ... similar) can be found in this book as a plug- in. And even if it isn’t, because each and every plug- in is broken down into component parts and explained in detail, you should find you can cherry-pick...