How can I get a variable from JS into MySql database?

Question

I want to save the variable from JS named count into my MySql database.

let count = 0;
countup.addEventListener("click", function() {
    count = count + 1;
    counter.innerText = count;
    let avgberechnung = count / 365;
    avg.innerText = avgberechnung + " Ø Köpfe am Tag";                       
},false);

How can I do this?

Answer 1

Possible solution with php server

1. Use ajax to send request

   $.post('save.php',{count:count})

   .done(function(data){

   alert("success -".data);

   });

2. Create a PHP file (here save.php) to save the post data.

helpful links

Insert data into mysql database

Jquery ajax