PHP 5.4 upload progress test

<?php
if(isset($_GET["session_name"]))
{
    session_name($_GET["session_name"]);
}
else
    session_name("PHPSESSID");

session_start();
if(isset($_GET["progress"]))
{
    echo "<u>SESSION</u><br/>";
    var_dump($_SESSION);
    echo "<u>COOKIE</u><br/>";
    var_dump($_COOKIE);
    die;
}
if(isset($_GET["upload"]))
{
    echo "<u>SESSION</u><br/>";
    var_dump($_SESSION);
    echo "<u>COOKIE</u><br/>";
    var_dump($_COOKIE);
    echo "<u>FILES</u><br/>";
    var_dump($_FILES);
    die;
}
?>

<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <script type="text/javascript" src="http://code.jquery.com/jquery-1.9.0.min.js"></script>
        <script type="text/javascript" src="http://malsup.github.com/jquery.form.js"></script>
        <title>PHP 5.4 File Upload Progress TEST</title>
    </head>
    <body>
        <form id="UploadForm" method="post" enctype="multipart/form-data" action="?upload">
            <div class="row-fluid">
                <input type="hidden" name="<?php echo ini_get("session.upload_progress.name");?>" value="upload" />
                Sélectionnez un fichier local : <input type="file" name="fichier" id="fichier"/><br/>
                <input type="submit" value="envoyer"/>
            </div>
            <div id="resultProgress" style="background-color:#FAA">  </div>
            <div id="resultUpload" style="background-color:#AFA">  </div>
        </form>
        <script type="text/javascript">
        var interval_id;
        $(document).ready(function(){
            $("#UploadForm").submit(function(e){
                e.preventDefault();
                var filename=$("#fichier").val();
                console.clear();
                console.log("fichier selectionné: "+filename);
                $("#UploadForm").ajaxSubmit({
                    cache:false,
                    success:function(data, textStatus)
    				    { stopProgress(); $("#resultUpload").html(data); console.log('ajaxSubmit SUCCESS');	},
                    complete:function(XMLHttpRequest, textStatus)
                        { stopProgress(); console.log('ajaxSubmit COMPLETE'); },
                    error:function(XMLHttpRequest, textStatus, errorThrown)
                    { stopProgress(); console.log('ajaxSubmit ERROR'); }
                });
                check_progress('upload');
            });
        });

        function check_progress()
        {
            interval_id = setInterval(function() {
                $.ajax({
                    type: 'GET',
                    dataType: 'html',
                    url: '?progress',
                    cache: false,
                    success:function(data,textSatatus)
                        { if(data) $("#resultProgress").html(data); else stopProgress(); }
                });
            }, 200);
        }

        function stopProgress()
        {
            clearInterval(interval_id);
        }

        </script>
    </body>
</html>