Most web frameworks I've seen handle form validation using exceptions; if the form fields or the whole form don't meet the requirements, an exception is thrown and dealt with (redirect back to the ...

Take advantage of automatic model state validation in ASP.Net Core to avoid tedious manual coding for HTML form validation ...

How to Inject Attributes Into Code Using PHP. HTML is a markup language rather than a programming language. You can specify how you want text to appear on a Web page with HTML, but you can't make ...