function aggregator_parse_w3cdtf

Parses the W3C date/time format, a subset of ISO 8601.

PHP date parsing functions do not handle this format. See http://www.w3.org/TR/NOTE-datetime for more information. Originally from MagpieRSS (http://magpierss.sourceforge.net/).

Parameters

$date_str: A string with a potentially W3C DTF date.

Return value

A timestamp if parsed successfully or FALSE if not.

File

modules/aggregator/aggregator.parser.inc, line 303

Code

function aggregator_parse_w3cdtf($date_str) {
    if (preg_match('/(\\d{4})-(\\d{2})-(\\d{2})T(\\d{2}):(\\d{2})(:(\\d{2}))?(?:([-+])(\\d{2}):?(\\d{2})|(Z))?/', $date_str, $match)) {
        list($year, $month, $day, $hours, $minutes, $seconds) = array(
            $match[1],
            $match[2],
            $match[3],
            $match[4],
            $match[5],
            $match[6],
        );
        // Calculate the epoch for current date assuming GMT.
        $epoch = gmmktime($hours, $minutes, $seconds, $month, $day, $year);
        if ($match[10] != 'Z') {
            // Z is zulu time, aka GMT
            list($tz_mod, $tz_hour, $tz_min) = array(
                $match[8],
                $match[9],
                $match[10],
            );
            // Zero out the variables.
            if (!$tz_hour) {
                $tz_hour = 0;
            }
            if (!$tz_min) {
                $tz_min = 0;
            }
            $offset_secs = ($tz_hour * 60 + $tz_min) * 60;
            // Is timezone ahead of GMT?  If yes, subtract offset.
            if ($tz_mod == '+') {
                $offset_secs *= -1;
            }
            $epoch += $offset_secs;
        }
        return $epoch;
    }
    else {
        return FALSE;
    }
}