note 79037 added to function.localtime

The functions shown below may help implement a timezones library. <?php /** * This function returns the server timezone offset in seconds * e.g. Sydney in DST returns +1100 / 100 * 60 * 60 = 39600 */ function getServerTimeZoneOffset() { return date("O") / 100 * 60 * 60; // Seconds from GMT } /** * This function returns the local timezone offset in seconds * where getTimeZone($userid) returns a timezone see below. */ function getLocalTimeZoneOffset($userid) { return getTimeZone($userid) / 100 * 60 * 60; // Seconds from user GMT } // Now converting a server timestamp to a local timestamp is very simple. /** * Will take a timestamp and minus off Server GMT and add on user GMT seconds * thereby making a local timestamp from a server timestamp. */ function getLocalTimestampFromServerTimestamp($userid, $timestamp) { return $timestamp - getServerTimeZoneOffset() + getLocalTimeZoneOffset( $userid ); } //And getting the local time from a user entered date is a useful function. //Combine the next two functions to achieve just that. function getLocalTimestampFromDateTime($userid, $datetime) { $timestamp = strtotime($datetime); return getLocalTimestampFromServerTimestamp($userid, $timestamp); } /** * If you have a localized timestamp and just want to get the date format use this. */ function getFormattedDate($userid, $timestamp) { return date("Y-m-d H:i:s " . getTimeZone($userid), $timestamp); } /** * Returns a timezone in the format +0000 * e.g. Perth in DST returns +0900 */ function getTimeZone($userid) { return "+0900"; // Perth in DST } ?> ---- Server IP: 203.16.234.20 Probable Submitter: 124.171.62.57 ---- Manual Page -- http://www.php.net/manual/en/function.localtime.php Edit -- https://master.php.net/note/edit/79037 Del: integrated -- https://master.php.net/note/delete/79037/integrated Del: useless -- https://master.php.net/note/delete/79037/useless Del: bad code -- https://master.php.net/note/delete/79037/bad+code Del: spam -- https://master.php.net/note/delete/79037/spam Del: non-english -- https://master.php.net/note/delete/79037/non-english Del: in docs -- https://master.php.net/note/delete/79037/in+docs Del: other reasons-- https://master.php.net/note/delete/79037 Reject -- https://master.php.net/note/reject/79037 Search -- https://master.php.net/manage/user-notes.php