Трабла с FormData PHP

file = $('input[type="file"]').prop('files')[0];
data = new FormData();
data.append('Filedata', file);
data.append('text', 'text')

var formData = new FormData($(".file_upload_form")[0]);
$.ajax({
    url: "upload_file.php", // server script to process data (POST !!!)
    type: 'POST',
    xhr: function() { // custom xhr
        myXhr = $.ajaxSettings.xhr();
        if (myXhr.upload) { // check if upload property exists
            // for handling the progress of the upload
            myXhr.upload.addEventListener('progress', progressHandlingFunction, false);
        }
        return myXhr;
    },
    success: function(result) {
        console.log($.ajaxSettings.xhr().upload);
        alert(result);
    },
    // Form data
    data: formData,
    //Options to tell JQuery not to process data or worry about content-type
    cache: false,
    contentType: "application/octet-stream", // Helps recognize data as bytes
    processData: false
});

function progressHandlingFunction(e) {
    if (e.lengthComputable) {
        $("#progress").text(e.loaded + " / " + e.total);
    }
}

<button id="add" type="submit" class="btn btn-default" onclick="CKupdate();">Загрузить</button>
function CKupdate() {
      for (instance in CKEDITOR.instances)  CKEDITOR.instances[instance].updateElement();
}

var text = CKEDITOR.instances.text.getData();