contentType: false,
processData: false,

$("#file").on("change", function () {
var formData = new FormData();
formData.append("fo", "bar");
formData.append("selam", "kelam");
formData.append("image", $("input[type=file]")[0].files[0]);

$.ajax({
url: "upload.php",
data: formData,
type: "POST",
contentType: false,
processData: false,
});
});