In this article you will be shown how to build a simple, yet powerful and extensible jQuery form validation plugin.
This article does not show you how to use the jQuery validate plugin,
it covers building a lightweight, flexible solution from scratch. It
won't be nearly as advanced and powerful as the official plugin.
Nevertheless, you'll learn something new from a jQuery, JavaScript and
Object-Oriented aspect.
You
are going to learn how to validate your forms, in this indepth
tutorial, using PHP and jQuery in both sides: client side (using
javascript with jQuery) and server side (using PHP).
At the end of
the tutorial, you will get a final real working example that will
validate your fields with / without javascript enabled, amd always
making use of server side validaton.
In
this tutorial, you will learn how to create your own jQuery contact
form using PHP and JQuery. The tut takes you through the initial
basics, creating a single page for your contact form that contains the
markup, PHP to process our contact form and then on to the tricky
process of jQuery validating.
When
it comes to simpler user experience, having your form validation happen
instantly on the same page is a lot cleaner than reloading pages and
possibly losing some form content. In this tutorial you'll be shown how
to use jQuery to do some instant checking on an example comment form.
This
screencast walks you through the code that powers a fairly advanced web
form. It utilizes jQuery to hide and show inputs as needed as well as
power three plugins. One for applying fancy styling, one for
validation, and one for the serializing of the inputs and AJAX
submission. You will then use PHP to optionally save the users name and
email, as well as send the actual email.
There
are lots of WordPress plugins for contact forms, but wouldn’t it be
nice to have more control over the markup? In this tutorial, you will
be shown how to use a custom page template to create a contact form in
WordPress without a plugin, and use conditional statements, for
validation, to determine if the form had been submitted or not.
When
it comes to form validation, it’s hard to have a versatile solution
that works with every form. Figuring out how to display errors is not a
simple task.
In this tutorial you will be shown how to create a
form, and when an error needs to be displayed, the script will create a
div and positions it in the top right corner of the input. This way you
will not have to worry about your HTML form structure. The rounded
corner and shadow in the tutorial hasbeen built with CSS3 and degrades
well in non compliant browsers.
This
article discusses client-side validation using jQuery's validation
plugin. That is, you will use JavaScript to validate the fields before
submitting the form to the server. This is fast and efficient and
provides quick replies to your visitor in the event of any errors.
However, it is advisable to also validate the data on the server-side
before adding it into the database.
In the tutorial you will create
a form that contains four fields: name, e-mail, comment and URL. The
first three fields are required, whereas the URL field is optional.
And, if you submit the form without filling in the required fields, you
will be prompted with an error message.
This tutorial expects you to have already built your form up to the point where it works, but now needs some validation.
When you finish this tutorial, the username example, you have built,
will check with the server whether the chosen name is a) valid and b)
available. And the avatar example will try to load the URL in to a
hidden image, if it fails, it will show the appropriate message.
There
are many jQuery plugins available to download that are similiar to what
you will build in this tutorial. But if you need more flexibilty with
your form or a better understanding of validation this tutorial will
help you. So, here is a step-by-step approach to achieving client side
JavaScript validation using jQuery.
In
this article, from Smashing magazine, you will learn to go beyond the
validation of a form itself and explore different validation and error
feedback techniques, methods and approaches. The article gives you
indepth analysis of the pros and cons of server-side and client-side
validation, and offers some great advice.
