Validating form fields with ajax
Proper validation of form data is important to protect your form from hackers and spammers!field_var cross = ''; var tick = ''; var loading = ''; // Send the data from the form to the PHP file 'jqueryvalidate.php', where they will call the function to validate the data $('input:text,input:password,input[type=email]').blur(function() ); $('input:checkbox').click(function() ); As you can see, this has two different functions for the validation: one for text, password and email fields and another for checkboxes. You're unnecessarily tying your validate_input function to mysql Connect(). There's no reason to type that My SQL block over and over again.A random function should not be responsible for setting up a DB connection. Make it a function and it will go a long way towards cleaning this up.If it has not been submitted, skip the validation and display a blank form.However, in the example above, all input fields are optional.You probably wont even need the cross variable as you do indeed define it again on the next script "validatefields.js".
Lately I've noticed from looking through our Google Analytics and our search popularity, we have been coming up a lot for AJAX Forms.
Read the setup guide if you want to know which configuration options that are available when setting up the validation.
Here you can read more about styling of the form and error dialogs.
This is just a simple and harmless example how the PHP_SELF variable can be exploited.
Be aware of that any Java Script code can be added inside the - this would not be executed, because it would be saved as HTML escaped code, like this: <script>location.href(' The code is now safe to be displayed on a page or inside an e-mail.
Before we go into details, let's get a basic understanding of what we will be doing.