Username availability checking using Ajax

username availability checking

Hi everybody, in my previous blog I show you how to create auto complete application in PHP using ajax and jQuery. Today I am talking about username availability checking and also email address availability checking using PHP, jQuery and Ajax. It is common application for every project. When a user want to register we have to check if username that the user is trying to use during registration process is already taken. Using Ajax, jQuery and PHP we can easily solve the problem. Lets start to build our application.
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