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This tutorial will explain you about live username availability checking using ajax and PHP and about the live password strength indicator. You can see this logic in many websites during signup example Google and Twitter. As the same here this tutorial will explain you about those. Means if I am entering the username or email it will suggest me the availability whether the username is available or not. So that user will let to know the availability before form getting submits. So in this tutorial we will make an Ajax username availability checker with help of jQuery. So here we are going to use Ajax, jQuery, PHP and MySql. Let’s start.


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