<?php
// filename: test.php

if (isset($_POST['cola']))
{
    // Static class FirePHP from PEAR
    require 'FirePHPCore/fb.php';

    // DEBUG
    FB::info($_POST['cola']);
    
    /* Sample output
    array(
        'pepsi'        => 'on'
        'le_cola'    => 'on'
        'cola_turka'=> 'on'
    )
    */
}
?>
<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Test</title>
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
    <script>
        $(function(){

            $("#form input[type=checkbox]").click(function()
            {
                $.post("test.php", $("#form").serialize());
            });

        });
    </script>
</head>
<body>
    
    <form action="post" id="form">
        <ul>
            <li><input type="checkbox" name="cola[coca_cola]"> Coca Cola</li>
            <li><input type="checkbox" name="cola[pepsi]"> Pepsi</li>
            <li><input type="checkbox" name="cola[le_cola]"> Le Cola</li>
            <li><input type="checkbox" name="cola[cola_turka]"> Cola Turka</li>
        </ul>
    </form>
    
</body>
</html>