<?php /* * Project: MagpieRSS: a simple RSS integration tool * File: rss_utils.inc, utility methods for working with RSS * Author: Kellan Elliott-McCrea <kellan@protest.net> * Version: 0.51 * License: GPL * * The lastest version of MagpieRSS can be obtained from: * http://magpierss.sourceforge.net * * For questions, help, comments, discussion, etc., please join the * Magpie mailing list: * magpierss-general@lists.sourceforge.net */ /*======================================================================*\ Function: parse_w3cdtf Purpose: parse a W3CDTF date into unix epoch NOTE: http://www.w3.org/TR/NOTE-datetime \*======================================================================*/ function parse_w3cdtf ( $date_str ) { # regex to match wc3dtf $pat = "/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})(:(\d{2}))?(?:([-+])(\d{2}):?(\d{2})|(Z))?/"; if ( preg_match( $pat, $date_str, $match ) ) { list( $year, $month, $day, $hours, $minutes, $seconds) = array( $match[1], $match[2], $match[3], $match[4], $match[5], $match[7]); # calc epoch for current date assuming GMT $epoch = gmmktime( $hours, $minutes, $seconds, $month, $day, $year); $offset = 0; if ( $match[11] == 'Z' ) { # zulu time, aka GMT } else { 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? then subtract offset # if ( $tz_mod == '+' ) { $offset_secs = $offset_secs * -1; } $offset = $offset_secs; } $epoch = $epoch + $offset; return $epoch; } else { return -1; } } ?>