how to pass custom fields to $_POST or $_GET in CKEdtior Upload dialog?

问题

For example I have add 2 inputs:

infoTab.add( {
                   type : 'text',
                   hidden : false,
                   id: 'image_group',
                   label: 'A',
                   default: ''

               });

               infoTab.add( {
                   type : 'text',
                   hidden : false,
                   id: 'image_size',
                   label: 'B,',
                   default: ''
               });

I fill these fields mannualy with random data and when I press "Send it to the server" I can't see in $_POST or $_GET these values or keys? What I must change to send this custom form elements to Server? Thank you!

来源：https://stackoverflow.com/questions/40867123/how-to-pass-custom-fields-to-post-or-get-in-ckedtior-upload-dialog