Get Checkbox Value Without Page Refresh

I got a table of checkboxes:

Solution 1:

You want to use AJAX. Here is an example in jQuery without AJAX:

<td><input id="box1" class="box" name="box1"type="checkbox" value="1" checked /></td>
<td><input id="box2" class="box" name="box2"type="checkbox" value="2" checked /></td>
<td><input id="box3" class="box" name="box3"type="checkbox" value="3" checked /></td>

JavaScript:

$(document).ready(function() {
  $('.box').on('change', function(event) {
    var checkbox = $(event.target);
    var isChecked = $(checkbox).is(':checked');
    alert('checkbox ' + checkbox.attr('id') + ' is checked: ' + isChecked);
  });
});

Demo: http://jsbin.com/ipasud/1/

Now instead of doing an alert call, do a $.post to a backend URL that takes an id and a value of checked or unchecked. For example,

$.post('/submit-checkbox.php', {id: checkbox.attr('id'), value: isChecked});

And if we put that back into the code, it would look like this:

$(document).ready(function() {
  $('.box').on('change', function(event) {
    var checkbox = $(event.target);
    var isChecked = $(checkbox).is(':checked');
    $.post('/whatever-your-url-is.php', {id: checkbox.attr('id'), value: isChecked});
  });
});

Solution 2:

You can use jQuery: http://jquery.com/

<scripttype="text/javascript">
    $(document).ready(function(){
        $('#box').click(function(){
           var selectedValue = $(this).value();
           submitValue(selectedValue);
        });

    });

    functionsubmitValue(valueSelected){

       var request = $.ajax({
                 url: URL_OF_YOUR_PHP_FILE,
                 type: "POST",
                 dataType: 'json',
                     data: {value: valueSelected}
              });

        request.done(function(results) {
           //DO WHAT YOU WANT WITH YOUR RESULTS
        });
    }
</script>

Then in your PHP file you can get the value selected in $_POST['value'] and return what you want (in JSON format).

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