note 107606 deleted from function.date by peehaa

Note Submitter: gerben at gerbenwijnja dot nl ---- I use the function below to calculate the Unix timestamp of the start of a week. It includes a boolean flag to request a GMT offset instead of the current locale setting. <?php function getWeekOffsetTimestamp($year, $week, $useGmt = false) { if ($useGmt) { // Backup timezone and set to GMT $timezoneSettingBackup = date_default_timezone_get(); date_default_timezone_set("GMT"); } // According to ISO-8601, January 4th is always in week 1 $halfwayTheWeek = strtotime($year."0104 +".($week - 1)." weeks"); // Subtract days to Monday $dayOfTheWeek = date("N", $halfwayTheWeek); $daysToSubtract = $dayOfTheWeek - 1; // Calculate the week's timestamp $unixTimestamp = strtotime("-$daysToSubtract day", $halfwayTheWeek); if ($useGmt) { // Reset timezone to backup date_default_timezone_set($timezoneSettingBackup); } return $unixTimestamp; } ?>