AJAX checkboxes with Jquery and PHP

Question

I have two rows of check-boxes. When a user clicks on any individual check-box (in a certain row) I want to add a number to my sum in PHP. If he deselects an individual chec

Answer 1

Try:

<script type="text/javascript">
 function processForm() { 
    $.ajax( {
        type: 'POST',
        url: 'submit_form.php',
        data: { checked_box : $('input:checkbox:checked').val()},

        success: function(data) {
            $('#message').html(data);
        }
    } );
}
</script>

Answer 2

You have to serialize the form into a JS object, that's what goes into the data field. Here's a simple serialize function, that could be improved, but will give you an idea

function serializeForm(form) {
    var obj = {};
    for (var i = 0; i < form.elements.length; i++) {
        var el = form.elements[i];
        if (el.name) {
            if (obj[el.name] && obj[el.name].constructor == Array ) {
               obj[el.name].push(el.value);              
            } else if (obj[el.name]) {
               obj[el.name] = [obj[el.name], el.value];
            } else {
               obj[el.name] = el.value;
            }
        }
    }
    return obj; 
}

There is a plugin that lets you submit forms with AJAX easily http://jquery.malsup.com/form/ See jQuery AJAX submit form

Assuming the following HTML

<form id="myForm" action="submit_form.php" method="post"> 
  <input type="checkbox" name="standard_form[]" value="A" onclick="processForm()">
  <input type="checkbox" name="premium_form[]" value="B" onclick="processForm()">
</form>

You can just do the following to have the form posted with AJAX

// attach handler to form's submit event 
$('#myForm').submit(function() { 
    // submit the form 
    $(this).ajaxSubmit(); 
    // return false to prevent normal browser submit and page navigation 
    return false; 
});

Answer 3

In checkboxes try onclick="processForm(this)", then, in JavaScript:

<script type="text/javascript">
function processForm(elm) { 
        $.ajax( {
            type: 'POST',
            url: 'submit_form.php',
            data: elm.name+'='+elm.value,

            success: function(data) {
                $('#message').html(data);
            }
        } );
}
</script>