通过ajax发送php请求onclick

Question

I know this question have been asked alot but none of the answer are related to my case ,I have a button ,onclick it should call a javascript function send it a php variable,and ajax would call a php file via post and send that vriable and the php file updates my table

so here is the onclick event first

<button class="button button6 " onclick="incrementclicks('<?php echo $id; ?>');">increment</button>

it should send a variable called $id to the javascript function

<script type="text/javascript">
    function incrementclicks(id) {
        $.ajax({
            url: "increment.php",
            data: "id=" + id,
            type: "POST"
        });
    }
</script>

and the php file increment.php (I'm 100% sure it connects to the server just fine )

<?php
     require_once 'dbconnect.php';
     $db_handle = new DBController();
     $id=$_POST["id"];
     $q="UPDATE clicks SET linkclicks = linkclicks + 1 WHERE id = '".$id."'";
     $result = mysql_query($q);
?>

it doesn't increment, I don't understand what did i do wrong here

Answer 1

First of all you can debug your code on the php by doing

echo $id;
exit();

My quess is that your are missing something there..