1 entry per calendar day

I needed to get the webform to let a user submit the form each day, no matter what time of day they were submitting it.

The way it works now, the user has to wait 24 hours from their last submission.

I remedied this by declaring a variable like this:

  $offset = (date("H") * 60 * 60);
  $offset += (date("i") * 60);

then replacing:

  $result = db_query($query, $user->uid, $_SERVER['REMOTE_ADDR'], $user->uid, ($node->webform['submit_interval'] != -1) ? time() - $node->webform['submit_interval'] : $node->webform['submit_interval'], $node->nid);

with:

  $result = db_query($query, $user->uid, $_SERVER['REMOTE_ADDR'], $user->uid, ($node->webform['submit_interval'] != -1) ? time() - $node->webform['submit_interval'] + $offset : $node->webform['submit_interval'] + $offset, $node->nid);

and :

  if ($timestamp <= time() - $node->webform['submit_interval']) {

with:

  if ($timestamp <= time() - $node->webform['submit_interval'] + $offset) {

Not sure if this is the best way, but it seems to work.