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<?php
namespace Bitweaver\Rss;
/**
* @package rss
* FeedDate is an internal class that stores a date for a feed or feed item.
* Usually, you won't need to use this.
*/
class FeedDate {
public $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=="") $dateString = date("r");
if (is_numeric($dateString)) {
$this->unix = $dateString;
return;
}
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 = [ "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 = ( substr( $matches[7], 0, 3 ) * 60 + 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 = ( substr( $matches[7], 0, 3 ) * 60 + 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", $this->unix);
if (TIME_ZONE!="") {
$date .= " ".str_replace(":","",TIME_ZONE);
} else {
$date .= " ".str_replace(":","","GMT");
}
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 string a date as a unix time stamp
*/
public function unix() {
return $this->unix;
}
}
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