It is used when registering users on a website. it is mainly used to check whether the user's user name or Email has been registered without refreshing asynchronous verification. This function is certainly available on most websites, I have been very interested in this function, so I have studied jQuery + Aja over the past few days... it is used when registering users on a website. it is mainly used to check whether the user's user name or Email has been registered without refreshing asynchronous verification. This function is certainly available on most websites, I have been very interested in this function, so I have studied jQuery + Ajax over the past few days. the whole function is not perfect, but it is enough to deal with common code, let's explore more functions.
File description:
Reg. php is the registration page
Check_user.php is the user verification page (optional for GET and POST methods)
Jquery-1.7.1.js is a jQuery file,: http://code.jquery.com/jquery-1.7.1.js (right-click to save)
Sample code
Reg. php registration page (contains two methods, please choose one), the code is as follows:
PHP + Ajax asynchronous communication registration verification 
