Chapter 16. JavaScript and PHP Validation and Error Handling
With your solid foundation in both PHP and JavaScript, itâs time to bring these technologies together. In this chapter, weâll be looking at how to create web forms that are as user-friendly as possible.
Weâll 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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