使用ajax将值插入数据库，其中session变量等于当前用户会话[关闭]

Question

I'm trying to insert a value generated by a PHP script using an ajax function into my database based on the current session. Below it's my ajax function to generate a new address:

<script>
function newaddress(){
  $.ajax({
        url:"newaddress.php", //the page containing php script
        type: "POST", //request type
        success:function(result){                           
        document.getElementById('depositAddress').value = result;       
        alert("New address generated");
       }
     });
 }
</script>

My question is, How to add the 'result' to the database using the current session running on the page? I thought something along the lines of

<?php
    include_once 'dbh.inc.php';
    $sql = "INSERT INTO users(BTCAddress) VALUES ('result') WHERE ('u_uid') = ($_SESSION['u_uid']);";
?>

The second php script was just rough working out. Do i need to use the post method? If so, How to get the result generated by the ajax javascript to post into the php file in order to save the address generated into the database 'user' where the session is equal to the current session running on the web page?. Sorry if i have waffled on or overcomplicated things. Any help would be greatly appreciated.

Answer 1

I solved it. I realise that there were some stupid questions in my first post - sorry about that. It was as easy as appending the newaddress.php file to add a new session variable and then UPDATE the database.

$user = $_SESSION['u_uid'];
$_SESSION['BTCAddress'] = $btcaddress;
$sql = "UPDATE users SET BTCAddress = '$btcaddress' WHERE user_uid = '$user';";
mysqli_query($conn, $sql);

Very simple in the end. Thanks for all the input.