Learn how to create an Ajax contact form with a PHP upload function and form field validation. You can avoid page refreshes and provide an improved user experience by using Ajax. PHP code is used to process the Ajax request on the server side. In working on my own sites and that of my clients, I’ve found that combining PHP, jQuery and of course HTML provides a solid Ajax solution. Most of my tutorials contain full working code examples and all of the information you’ll need to use the code in your own projects.