使用AJAX在PHP中设置会话变量

Question

After a user clicks a div this javascript function runs:

$('.test').click(function(e)
    {
        e.preventDefault();
        $.ajax({
            url: 'ajax.php',
            type: 'POST',
            data: {"id": "<?php echo $rows['id']?>"},
            success:function(data){
                window.location.href = 'index.php';
            }
        });
    });

I want to pass in an ID associated with the div the user clicks into my ajax.php file where this code runs:

<?php
    session_start();
    //connect to db here
    $_SESSION['id'] = $_POST['id'];
?>

However this is not working. To expand further what I did to pass get the rows['id'] variable is run this SQL code:

$sql_select = "SELECT id FROM ids WHERE id = '$id'";
$results_select = $conn->query($sql_select);

I then outputted a bunch of divs with id's corresponding to them:

<?php
    while ($select_rows = mysqli_fetch_array($results_select))
    {
        echo "<div class = 'test'></div>";
    }
?>

Does anyone know how I can accomplish this?

Answer 1

Use data attributes:

Try:

<?php
    while ($select_rows = mysqli_fetch_array($results_select))
    {
        echo "<div data-id='".$rows['id']."' class = 'test'></div>";
    }
?>

js:

$('.test').click(function(e)
    {
        e.preventDefault();
        $.ajax({
            url: 'ajax.php',
            type: 'POST',
            data: {"id": $(this).attr('data-id')},//fetch the data attribute 
            success:function(data){
                window.location.href = 'index.php';
            }
        });
    });