ajax submit form with file - php

Question

I have form, with ajax, that contain textarea and upload file field
I can submit only one of them.
how can I fix that?
I want to send "info" + "filesData" to the server.
Please advise.
Thank you in advanced
AJAX :
$(function() {
$("#submit").click(function() {
var file_data = $('#files').prop('files')[0];
var form_data = new FormData();
form_data.append('file', file_data);
var files_data = form_data;
alert(files_data);
var act = 'add';
var $form = $("#addCommentForm");
var info = $form.serialize();
info += '&act=' + act ;
alert(info);
$.ajax({
type: "POST",
url: "ajax/addPost.php",
dataType: 'text', // what to expect back from the PHP script, if anything
cache: false,
contentType: false,
processData: false,
data: files_data,
success: function(data)
{
// alert(data); // show response from the php script.
$('#commentsBox').html(data);
$("#addCommentForm")[0].reset();
}
});
return false;
});
});
HTML:
<form class="form-horizontal" action='#' method="post" id="addCommentForm" enctype="multipart/form-data">
<div class="form-group">
<div class="col-md-8 col-xs-12">
<textarea class="form-control" name="post[text]"></textarea>
</div>
</div>
<div class="form-group">
<div class="col-md-8 col-xs-12">
<input type="file" class="form-control" name="file" id="files">
</div>
</div>
<div class="form-group">
<label class="col-xs-2 control-label" for="textinput"></label>
<div class="col-md-8 col-xs-12">
<a class="btn btn-primary" id="submit">submit</a>
</div>
</div>
</form>
PHP
print_r ($_FILES);
print_r ($_POST);

Answer 1

In $.ajax call, subtitute the value of data parameter (filesData) by:
{ field1 : field1value, field2 : field2value, .... }
use as many field/value pairs as you need
you also can get the values directly like this:
{ field1 : $('#commentsBox').text(), field2 : $('#yourinput').val(), .... }