In this tutorial you will learn How to create a Username Availability Live check Script using jQuery Ajax and PHP, it's easy to create, i have used here $.ajax() you can also use $.post() method to create same script, flow is simple as user types preferred username in the input box then "$.ajax()" function calls an HTTP POST request dynamically and fetch the username from the MySQL Database Table through the PHP Script and shows that the username available or not all the functionality will done by "$.ajax()" keyup() event, have a look.
Read more »
