Sending 0 instead "" when unchecked

[Elhombrebala]

I have a collection of radio buttons that have to send several values via post to database. When they are checked, they send the value but when they are unchecked, they send "" (nothing) and it is stored in table (In which default content was 0) this cause me troubles.
How can I send alternative value 0 when unchecked or how can I prevent this bullshit?
🙁

[paulnaj]

You could have a 'hidden' element on the form. Then, use javascript to update this element when the user clicks a radio button.

It could start with 0 as the value by default.

[ahundiak]

Unchecked boxes don't post because that's the way http works and php can't do much about it. You can use javascript as paulnaj suggests.

Or do something like this:

function get_checked_value($name)
{
  if (isset($_POST[$name])) $value = $_POST[$name];
  else                     $value = 0;
  return $value;
}

$deleteFlag = get_checked_value('delete');