note 70031 added to function.date-sunset

I use an IP to location database to determine the visitor's
approximate latitude and longitude and then serve them a day
or night color scheme based on whether it is before civil
dawn or dusk. I've had problems when not specifying the
timezone, specifically a 1 hour error, so I use GMT.

<?
date_default_timezone_set("GMT");

function scheme() {
        $sunrise = date_sunrise(time(), SUNFUNCS_RET_DOUBLE,
$latitude, $longitude, 96, 0);
        $sunset = date_sunset(time(), SUNFUNCS_RET_DOUBLE,
$latitude, $longitude, 96, 0);
        $now = date("H") + date("i") /
60 + date("s") / 3600;

        if ($sunrise < $sunset)
                if (($now > $sunrise) && ($now
< $sunset)) return "day";
                else return "night";
        else
                if (($now > $sunrise) || ($now <
$sunset)) return "day";
                else return "night";
}
?>
----
Server IP: 194.153.94.10
Probable Submitter: 86.108.85.74
----
Manual Page -- http://www.php.net/manual/en/function.date-sunset.php
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