Php code for validating a form
Then, you'll lern the basics of the PHP language: syntax, operators, variables, loops, functions, arrays, etc., and advanced things: object orientation, My SQL databases, XML parsing, web services, security, how to read and write cookies and session variables, and much more.
In this article we will see how to create a registration form in PHP and My SQL.
The main targets are Guestbook and Contact forms, but any online form can be a target for abuse.
The code presented here shows you how to create a simple CAPTCHA graphic with random lines and digits and how to incorporate it into an HTML form to prevent automated submission by malicious scripts.
The following code needs to be saved as a stand-alone PHP file (we call it ).
This file creates a PNG image containing a series of five digits.