Ajax中的AJAX PHP FormData不是空的，但在php $ _POST中，$ _FILES为空

Hi i have problem with ajax and formData

var formData = new FormData($('form')[0]);
formData.append('image', $('inputFile')[0].files[0]);

$.ajax({
type: "POST",
url: url,
data: formData,
processData: false,
contentType: false,
success: function(data) {
console.log(data);
}
});

in PHP i just print_r $_POST and $_FILES and it's empty.

HTML

<form onsubmit="return false;" enctype="multipart/data-form" method="POST">
<input type="file" id="inputFile" />
</form>

UPDATE

Headers are sent, request payload has the content but still $_POST or $_FILES are emptry.

   var file_data = $("#inputFile").prop("files")[0];
   var formData = new FormData();
   formData.append("image", file_data);
   $.ajax({
        type: 'post',
        cache: false,
        processData: false,
        url: url,
        data: ajaxData,
        error: function (result) {},
        success: function (result) {}
   });

You can get this as $_FILES['image'] in php code