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Learning PHP, MySQL, JavaScript, and CSS, 2nd Edition by Robin Nixon

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Chapter 16. JavaScript and PHP Validation and Error Handling

With your solid foundation in both PHP and JavaScript, it’s time to bring these technologies together. In this chapter, we’ll be looking at how to create web forms that are as user-friendly as possible.

We’ll be using PHP to create the forms and JavaScript to perform client-side validation to ensure that the data is as complete and correct as it can be before it is submitted. Final validation of the input will then be made by a PHP program, which will, if necessary, present the form again to the user for further modification.

In the process, this chapter will cover validation and regular expressions in both JavaScript and PHP.

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