JS How to pass a variable to PHP, or how JS triggers php functions

JS How to pass the variable to PHP, or JS how to trigger PHP function
In page a.php, you want to count the number of elements (picture/link) clicks in the page and store the clicks.

PHP is currently interacting with the database, so I want the user to click (Image/Link), PHP can react, to update the database in the corresponding table.

Excuse me, what method can I use to trigger the reaction of PHP when I click (Picture/link) ~ ~
------to solve the idea----------------------
Using Ajax
------to solve the idea----------------------
Use Ajax, or curl.
The quickest way is to use jquery's $.ajax method.
------to solve the idea----------------------
I'll give you a demo.
Need to download a jquery.js
$.ajax ({
Type: "POST",//Request method
URL: "some.php",//Request file
Data: "Name=john&location=boston",//parameters of the transmission
Success:function (msg) {
Alert ("Data Saved:" + msg);//Returns the result
}
});
Ajax can be seen as a form request. But you can return the results in real time

