Php gets parameters in get mode. how can I return values after processing?

Php has obtained the parameter in get mode. after processing, how can I return the value of a. php to receive a parameter from another address (B. aspx) (get mode)
A. php returns a 0 page after processing, for example, a. php? 0
B. aspx can receive the returned 0 through getresponse

How can I return 0 to myself in a. php?

Reply to discussion (solution)

What is a return of 0 to its own page?

$ Id = $ _ GET ['id'];
Echo $ id;

Output to this page or add it to the url?

For example, my page is a. php.
B. aspx uses get to upload a parameter.
After receiving and processing, a. php adds a parameter 0: a. php? 0
B. aspx uses getResponese to get the returned 0

I just want to know how to return such a 0 in B. php

B. aspx sends a get request parameter to a. php using the following statement, and obtains the return value of a. php.
HttpRes = HttpWebRequest. Create (new Uri (a. php + strUrlParameter). GetResponse ();

How can I return values in a. php?

Probably ajax, right? I wonder if it is the same thing as what you said.

Probably ajax, right? I wonder if it is the same thing as what you said.
It has nothing to do with ajax.

I don't know much about it.

B. aspx sends a get request parameter to a. php using the following statement, and obtains the return value of a. php.
HttpRes = HttpWebRequest. Create (new Uri (a. php + strUrlParameter). GetResponse ();

How can I return values in a. php?
A. php echo return value.

A. php echo return value.

Is returned to B. aspx

Ajax technology can be implemented directly in. if a value is returned in php, echo "value to be returned" can be directly used. This means that echo in page a does not output information to the browser, but returns B, B can get the returned value.