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<?php
/**
* FeedDate is an internal class that stores a date for a feed or feed item.
* Usually, you won't need to use this.
*
* @package de.bitfolge.feedcreator
*/
class FeedDate
{
protected $unix;
/**
* Creates a new instance of FeedDate representing a given date.
* Accepts RFC 822, ISO 8601 date formats as well as unix time stamps.
*
* @param mixed $dateString optional the date this FeedDate will represent. If not specified, the current date and
* time is used.
*/
public function __construct($dateString = "")
{
if ($dateString == "") {
$dateString = date("r");
}
if (is_integer($dateString)) {
$this->unix = $dateString;
return;
}
$tzOffset = 0;
if (preg_match(
"~(?:(?: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+(.*)~",
$dateString,
$matches
)) {
$months = Array(
"Jan" => 1,
"Feb" => 2,
"Mar" => 3,
"Apr" => 4,
"May" => 5,
"Jun" => 6,
"Jul" => 7,
"Aug" => 8,
"Sep" => 9,
"Oct" => 10,
"Nov" => 11,
"Dec" => 12,
);
$this->unix = mktime($matches[4], $matches[5], $matches[6], $months[$matches[2]], $matches[1], $matches[3]);
if (substr($matches[7], 0, 1) == '+' OR substr($matches[7], 0, 1) == '-') {
$tzOffset = (((int)substr($matches[7], 0, 3) * 60) + (int)substr($matches[7], -2)) * 60;
} else {
if (strlen($matches[7]) == 1) {
$oneHour = 3600;
$ord = ord($matches[7]);
if ($ord < ord("M")) {
$tzOffset = (ord("A") - $ord - 1) * $oneHour;
} elseif ($ord >= ord("M") AND $matches[7] != "Z") {
$tzOffset = ($ord - ord("M")) * $oneHour;
} elseif ($matches[7] == "Z") {
$tzOffset = 0;
}
}
switch ($matches[7]) {
case "UT":
case "GMT":
$tzOffset = 0;
}
}
$this->unix += $tzOffset;
return;
}
if (preg_match("~(\\d{4})-(\\d{2})-(\\d{2})T(\\d{2}):(\\d{2}):(\\d{2})(.*)~", $dateString, $matches)) {
$this->unix = mktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]);
if (substr($matches[7], 0, 1) == '+' OR substr($matches[7], 0, 1) == '-') {
$tzOffset = (((int)substr($matches[7], 0, 3) * 60) + (int)substr($matches[7], -2)) * 60;
} else {
if ($matches[7] == "Z") {
$tzOffset = 0;
}
}
$this->unix += $tzOffset;
return;
}
$this->unix = 0;
}
/**
* Gets the date stored in this FeedDate as an RFC 822 date.
*
* @return string a date in RFC 822 format
*/
public function rfc822()
{
//return gmdate("r",$this->unix);
$date = gmdate("D, d M Y H:i:s O", $this->unix);
return $date;
}
/**
* Gets the date stored in this FeedDate as an ISO 8601 date.
*
* @return string a date in ISO 8601 format
*/
public function iso8601()
{
$date = gmdate("Y-m-d\TH:i:sO", $this->unix);
$date = substr($date, 0, 22).':'.substr($date, -2);
if (TIME_ZONE != "") {
$date = str_replace("+00:00", TIME_ZONE, $date);
}
return $date;
}
/**
* Gets the date stored in this FeedDate as unix time stamp.
*
* @return int a date as a unix time stamp
*/
public function unix()
{
return $this->unix;
}
}
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