This tutorial describes about auto complete search in PHP, Mysql, Json. Auto complete search is very important in present Web Technology. This is very similar to facebook like Autosuggestion box or auto search box. Auto complete search means that when user enter any keyword in the text field then all the content related to the word comes into a drop down where user can scroll and view their respective content. This Autosuggestion is very important where user does not aware of their exact search.