| 1 | <?php |
| 2 | /* |
| 3 | * Project: MagpieRSS: a simple RSS integration tool |
| 4 | * File: rss_utils.inc, utility methods for working with RSS |
| 5 | * Author: Kellan Elliott-McCrea <kellan@protest.net> |
| 6 | * Version: 0.3 |
| 7 | * License: GPL |
| 8 | * |
| 9 | * The lastest version of MagpieRSS can be obtained from: |
| 10 | * http://magpierss.sourceforge.net |
| 11 | * |
| 12 | * For questions, help, comments, discussion, etc., please join the |
| 13 | * Mapgie mailing list: |
| 14 | * magpierss-general@lists.sourceforge.net |
| 15 | */ |
| 16 | |
| 17 | |
| 18 | /*======================================================================*\ |
| 19 | Function: parse_w3cdtf |
| 20 | Purpose: parse a W3CDTF date into unix epoch |
| 21 | |
| 22 | NOTE: http://www.w3.org/TR/NOTE-datetime |
| 23 | \*======================================================================*/ |
| 24 | |
| 25 | function parse_w3cdtf ( $date_str ) { |
| 26 | |
| 27 | # regex to match wc3dtf |
| 28 | $pat = "/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})(?:([-+])(\d{2}):?(\d{2})|(Z))?/"; |
| 29 | |
| 30 | if ( preg_match( $pat, $date_str, $match ) ) { |
| 31 | |
| 32 | list( $year, $month, $day, $hours, $minutes, $seconds) = |
| 33 | array( $match[1], $match[2], $match[3], $match[4], $match[5], $match[6]); |
| 34 | |
| 35 | # calc epoch for current date assuming GMT |
| 36 | $epoch = gmmktime( $hours, $minutes, $seconds, $month, $day, $year); |
| 37 | |
| 38 | $offset = 0; |
| 39 | if ( $match[10] == 'Z' ) { |
| 40 | # zulu time, aka GMT |
| 41 | } |
| 42 | else { |
| 43 | list( $tz_mod, $tz_hour, $tz_min ) = |
| 44 | array( $match[7], $match[8], $match[9]); |
| 45 | |
| 46 | # zero out the variables |
| 47 | if ( ! $tz_hour ) { $tz_hour = 0; } |
| 48 | if ( ! $tz_min ) { $tz_min = 0; } |
| 49 | |
| 50 | $offset_secs = (($tz_hour*60)+$tz_min)*60; |
| 51 | |
| 52 | # is timezone ahead of GMT? then subtract offset |
| 53 | # |
| 54 | if ( $tz_mod == '+' ) { |
| 55 | $offset_secs = $offset_secs * -1; |
| 56 | } |
| 57 | |
| 58 | $offset = $offset_secs; |
| 59 | } |
| 60 | |
| 61 | $epoch = $epoch + $offset; |
| 62 | return $epoch; |
| 63 | } |
| 64 | else { |
| 65 | return -1; |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | ?> |