javascript new Array - > php array

I have a page that has a bunch of tick boxes, these are identified with a name="a number". When a button is clicked, I have an JavaScript function that creates a new array with the numbers of the boxes ticked. This gets sent to a page 'test.php'.

It returns:

Array
(
    [data] => [null,"47284","47282","47281","47280","47279","47278","47277","47276","47269"]
)

When I try and explode this array I get an array to string conversion error.

What am I doing wrong?

I need to get these numbers separated so I can do an SQL query for each.

JavaScript code:

<script>
var selected = new Array();

function showMessage() {
var selected = Array();

    $('input:checked').each(function() {
        selected.push($(this).attr('name'));
    });
    var answer = confirm('Are you sure you want to send these emails again?');
    if(answer) {
    var jsonString = JSON.stringify(selected);
    $.ajax({
        url: "../../test.php",
        type: "POST",
        data: {data : jsonString}, 
        success: function(data){
            alert(data);
        }
    })
    }
}
</script>
<SCRIPT language="javascript">
$(function(){

    // add multiple select / deselect functionality
    $("#selectallsent").click(function () {
          $('.yes').prop('checked', this.checked);
    });
    $("#selectallprogress").click(function () {
          $('.no').prop('checked', this.checked);
    });

    // if all checkbox are selected, check the selectall checkbox
    // and viceversa
    $(".yes").click(function(){

        if($(".yes").length == $(".yes:checked").length) {
            $("#selectallsent").prop("checked", "checked");
        } else {
            $("#selectallsent").removeAttr("checked");
        }

    });
    $(".no").click(function(){

        if($(".no").length == $(".no:checked").length) {
            $("#selectallprogress").prop("checked", "checked");
        } else {
            $("#selectallprogress").removeAttr("checked");
        }

    });
});
</script>

test.php code:

<?
print_r($_POST);
?>

I know that I need to do something more on the test.php page but I would like to know what that is.

Two things you need to do ....

First one is to not stringify the selected object (jquery will deal with this for you)

function showMessage() {
var selected = Array();

    $('input:checked').each(function() {
        selected.push($(this).attr('name'));
    });
    var answer = confirm('Are you sure you want to send these emails again?');
    if(answer) {
    $.ajax({
        url: "../../test.php",
        type: "POST",
        data: {data : selected}, 
        success: function(data){
            alert(data);
        }
    })
    }
}

Then on the PHP side you can just access the values via

print_r($_POST["data"]);

This will be an array of your inputs.