Input Validation is the outer defensive perimeter for your web application.This perimeter protects the core business logic, processing and output generation.In this post, i would like to share useful jquery ajax form validation example from scratch.As we know todays, jquery become more popular and more powerful.Even where we do appear to have gotten it down, we’ll need to be concious of the following considerations.You should bear these in mind whenever implementing custom validators or adopting a 3rd party validation library.This is one of those compartmentalising by trust value issues I mentioned.
As with any security oriented library, be sure to personally review your preferred library for flaws and limitations.
Here, i will create PHP contact us form using html bootstrap framework.
When you click on "Send Message" button it will fire ajax post request and check validation and display it as now on bellow preview.
This is the sort of generic validation approach we should seek to avoid at all costs.
Validating input is intended to prevent the entry of unsafe data into the web application.