var myDropzone = new Dropzone("div#mydropzone", {
url: "/controller/method_receive_files",
sending: function (file, xhr, formData) {
formData.append('<?php echo $this->security->get_csrf_token_name(); ?>', '<?php echo $this->security->get_csrf_hash(); ?>');
}
});
//OR...
myDropzone.on('sending', function(file, xhr, formData) {
formData.append('<?php echo $this->security->get_csrf_token_name(); ?>', '<?php echo $this->security->get_csrf_hash(); ?>');
});