125 lines
3.8 KiB
PHP
125 lines
3.8 KiB
PHP
<?php
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/**
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* FeedDate is an internal class that stores a date for a feed or feed item.
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* Usually, you won't need to use this.
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*/
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class FeedDate
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{
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protected $unix;
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/**
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* Creates a new instance of FeedDate representing a given date.
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* Accepts RFC 822, ISO 8601 date formats as well as unix time stamps.
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*
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* @param mixed $dateString optional the date this FeedDate will represent. If not specified, the current date and
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* time is used.
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*/
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public function __construct($dateString = "")
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{
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if ($dateString == "") {
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$dateString = date("r");
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}
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if (is_integer($dateString)) {
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$this->unix = $dateString;
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return;
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}
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$tzOffset = 0;
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if (preg_match(
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"~(?:(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun),\\s+)?(\\d{1,2})\\s+([a-zA-Z]{3})\\s+(\\d{4})\\s+(\\d{2}):(\\d{2}):(\\d{2})\\s+(.*)~",
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$dateString,
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$matches
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)) {
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$months = Array(
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"Jan" => 1,
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"Feb" => 2,
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"Mar" => 3,
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"Apr" => 4,
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"May" => 5,
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"Jun" => 6,
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"Jul" => 7,
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"Aug" => 8,
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"Sep" => 9,
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"Oct" => 10,
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"Nov" => 11,
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"Dec" => 12,
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);
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$this->unix = mktime($matches[4], $matches[5], $matches[6], $months[$matches[2]], $matches[1], $matches[3]);
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if (substr($matches[7], 0, 1) == '+' OR substr($matches[7], 0, 1) == '-') {
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$tzOffset = (((int)substr($matches[7], 0, 3) * 60) + (int)substr($matches[7], -2)) * 60;
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} else {
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if (strlen($matches[7]) == 1) {
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$oneHour = 3600;
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$ord = ord($matches[7]);
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if ($ord < ord("M")) {
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$tzOffset = (ord("A") - $ord - 1) * $oneHour;
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} elseif ($ord >= ord("M") AND $matches[7] != "Z") {
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$tzOffset = ($ord - ord("M")) * $oneHour;
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} elseif ($matches[7] == "Z") {
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$tzOffset = 0;
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}
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}
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switch ($matches[7]) {
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case "UT":
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case "GMT":
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$tzOffset = 0;
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}
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}
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$this->unix += $tzOffset;
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return;
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}
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if (preg_match("~(\\d{4})-(\\d{2})-(\\d{2})T(\\d{2}):(\\d{2}):(\\d{2})(.*)~", $dateString, $matches)) {
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$this->unix = mktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]);
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if (substr($matches[7], 0, 1) == '+' OR substr($matches[7], 0, 1) == '-') {
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$tzOffset = (((int)substr($matches[7], 0, 3) * 60) + (int)substr($matches[7], -2)) * 60;
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} else {
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if ($matches[7] == "Z") {
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$tzOffset = 0;
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}
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}
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$this->unix += $tzOffset;
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return;
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}
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$this->unix = 0;
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}
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/**
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* Gets the date stored in this FeedDate as an RFC 822 date.
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*
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* @return string a date in RFC 822 format
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*/
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public function rfc822()
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{
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//return gmdate("r",$this->unix);
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$date = gmdate("D, d M Y H:i:s O", $this->unix);
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return $date;
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}
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/**
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* Gets the date stored in this FeedDate as an ISO 8601 date.
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*
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* @return string a date in ISO 8601 format
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*/
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public function iso8601()
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{
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$date = gmdate("Y-m-d\TH:i:sP", $this->unix);
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return $date;
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}
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/**
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* Gets the date stored in this FeedDate as unix time stamp.
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*
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* @return int a date as a unix time stamp
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*/
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public function unix()
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{
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return $this->unix;
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}
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}
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