cookie only exists on the page it was set

ucbones

I have a function to check if a cookie is set.

The cookie is set in interact/poll.php with the command

setcookie ("oxygenpoll",poll1,time()+1536000);

The function hasvoted then checks to see if the user has voted in poll1

function hasvoted(){
  if ($_COOKIE["oxygenpoll"] == "poll1"){
	$hasvoted="true";
  }
  else {
	$hasvoted="false";
  }
	return $hasvoted;
}

This returns false everywhere except where the cookie was set, because I can't get $_COOKIE["oxygenpoll"] anywhere other than on the page the cookie was set, everywhere else can't get the value of the cookie, any ideas?

Many thanks,

ucbones