// Grab all of POST and dump it in a db
$form = json_encode($_POST);

$blob = json_decode($blob['temp_data']);
$blog = (array) $blob;

while($blob = $result->fetch_assoc()) {
  $blob = json_decode($blob['temp_data']);
  $blog = (array) $blob;

  // do filtering and create new individual registrations here
  $options = array(
    "translation" => $blob->{'translation-language'},
    "meals" => $blob->{'meals-type'},
    "transportation" => $blob->{'transportation-type'},
    ...
  );
}

PHP Fatal error:  Call to a member function fetch_assoc() on a non-object