Validating user input php

In this article, we will aim to provide PHP solutions which will validate the most common fields used in website development:, Testuser1 is the local part of the email address while is the domain name.

Below are the specifications necessary for checking email address validity.

More and more browsers now support the constraint validation API, and it's becoming reliable.

This API consists of a set of methods and properties available on each form element.

A professional PHP developer validates data for both security and correctness of the data entered.

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There are three main reasons: In the real world, developers tend to use a combination of client-side and server-side validation, to be on the safe side.

Note that ARIA is an independent specification that's not specifically related to HTML5.

PHP form input validation is what separates amateur and professional PHP developers.

Sending data is not enough — we also need to make sure that the data users fill out in forms is in the correct format we need to process it successfully, and that it won't break our applications.

We also want to help our users to fill out our forms correctly and not get frustrated when trying to use our apps.