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<?php
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/*
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* Project: MagpieRSS: a simple RSS integration tool
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* File: rss_utils.inc, utility methods for working with RSS
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* Author: Kellan Elliott-McCrea <kellan@protest.net>
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* Version: 0.51
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* License: GPL
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*
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* The lastest version of MagpieRSS can be obtained from:
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* http://magpierss.sourceforge.net
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*
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* For questions, help, comments, discussion, etc., please join the
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* Magpie mailing list:
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* magpierss-general@lists.sourceforge.net
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*/
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/*======================================================================*\
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Function: parse_w3cdtf
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Purpose: parse a W3CDTF date into unix epoch
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NOTE: http://www.w3.org/TR/NOTE-datetime
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\*======================================================================*/
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function parse_w3cdtf ( $date_str ) {
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# regex to match wc3dtf
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$pat = "/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})(:(\d{2}))?(?:([-+])(\d{2}):?(\d{2})|(Z))?/";
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if ( preg_match( $pat, $date_str, $match ) ) {
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list( $year, $month, $day, $hours, $minutes, $seconds) =
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array( $match[1], $match[2], $match[3], $match[4], $match[5], $match[6]);
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# calc epoch for current date assuming GMT
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$epoch = gmmktime( $hours, $minutes, $seconds, $month, $day, $year);
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$offset = 0;
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if ( $match[10] == 'Z' ) {
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# zulu time, aka GMT
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}
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else {
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list( $tz_mod, $tz_hour, $tz_min ) =
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array( $match[8], $match[9], $match[10]);
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# zero out the variables
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if ( ! $tz_hour ) { $tz_hour = 0; }
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if ( ! $tz_min ) { $tz_min = 0; }
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$offset_secs = (($tz_hour*60)+$tz_min)*60;
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# is timezone ahead of GMT? then subtract offset
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#
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if ( $tz_mod == '+' ) {
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$offset_secs = $offset_secs * -1;
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}
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$offset = $offset_secs;
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}
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$epoch = $epoch + $offset;
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return $epoch;
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}
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else {
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return -1;
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}
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}
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?>
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