How does jqueryajax pass parameters to php?

How does jqueryajax pass parameters to php? The following question is delayed from this question: how can we prevent the passing of parameters from redirecting to the webpage? After the index.htmfile is submitted, addpage.phpis used to generate result.htm, but no folder and page data is obtained. The data is blank. How can I set it? The index.htm code is as follows: HTMLcode & lt; html & gt; & lt; head & gt how does jquery ajax pass parameters to php?
The following question is delayed from this question: how can we prevent the passing of parameters from redirecting to the webpage?
After the index.htmfile is submitted, addpage.phpis used to generate result.htm, but no folder and page data is obtained. The data is blank. How can I set it?

The index.htm code is as follows:

HTML code

  Ajax