File upload functionality is the most used feature for the web application. Generally, a form is submitted to upload file in PHP. IF you want to provide a better user interface, jQuery and Ajax can be used to upload file without page refresh. The FormData object compiles a set of key/value pairs to send using XMLHttpRequest. The files can also be sent using FormData by including a file input element in your the form.
The jQuery ajax is very useful when you want to post or get data from PHP script without page refresh. Generally, you return the string to Ajax call for updating a part of the web page. But sometimes requires getting the object or array data from PHP file for showing values in the different area. Using $.ajax() method in jQuery you can get JSON data from a file and set in the HTML element.
In this tutorial, we'll build a simple Ajax file upload script with jQuery and PHP. You will find many jQuery plugins for upload files or images without page refresh. But if you want to learn the Ajax file upload process and make your own Ajax file upload script, this tutorial will help you a lot. Here we'll show how you can upload file to the server without page refresh using jQuery, Ajax, and PHP.
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