/**
* Decodes a RFC 822 Date-header into a timestamp
*
* @param array dateParts the Date-header split by whitespace
* @return int the timestamp calculated from the header
*/
function getTimeStamp($dateParts)
{
/** $dateParts[0] == <day of week> Mon, Tue, Wed
** $dateParts[1] == <day of month> 23
** $dateParts[2] == <month> Jan, Feb, Mar
** $dateParts[3] == <year> 1999
** $dateParts[4] == <time> 18:54:23 (HH:MM:SS)
** $dateParts[5] == <from GMT> +0100
** $dateParts[6] == <zone> (EDT)
**
** NOTE: In RFC 822, it states that <day of week> is optional.
** In that case, dateParts[0] would be the <day of month>
** and everything would be bumped up one.
**/
/*
* Simply check to see if the first element in the dateParts
* array is an integer or not.
* Since the day of week is optional, this check is needed.
*/
if (count($dateParts) < 2) {
return -1;
}
/* remove day of week */
if (!is_numeric(trim($dateParts[0]))) {
$dataParts = array_shift($dateParts);
}
/* calculate timestamp separated from the zone and obs-zone */
$stamp = strtotime(implode(' ', array_splice($dateParts, 0, 4)));
if (!isset($dateParts[0])) {
$dateParts[0] = '+0000';
}
if (!preg_match('/^[+-]{1}[0-9]{4}$/', $dateParts[0])) {
/* zone in obs-zone format */
if (preg_match('/\\((.+)\\)/', $dateParts[0], $regs)) {
$obs_zone = $regs[1];
} else {
$obs_zone = $dateParts[0];
}
return getGMTSeconds($stamp, $obs_zone);
} else {
return getGMTSeconds($stamp, $dateParts[0]);
}
}
/**
* Decodes a RFC 822 Date-header into a timestamp
*
* @param array dateParts the Date-header split by whitespace
* @return int the timestamp calculated from the header
*/
function getTimeStamp($dateParts)
{
/* $dateParts[0] == <day of week> Mon, Tue, Wed
* $dateParts[1] == <day of month> 23
* $dateParts[2] == <month> Jan, Feb, Mar
* $dateParts[3] == <year> 1999
* $dateParts[4] == <time> 18:54:23 (HH:MM:SS)
* $dateParts[5] == <from GMT> +0100
* $dateParts[6] == <zone> (EDT)
*
* NOTE: In RFC 822, it states that <day of week> is optional.
* In that case, dateParts[0] would be the <day of month>
* and everything would be bumped up one.
*/
if (count($dateParts) < 2) {
return -1;
} else {
if (count($dateParts) == 3) {
if (substr_count($dateParts[0], '-') == 2 && substr_count($dateParts[1], ':') == 2) {
// dd-Month-yyyy 23:19:05 +0200
// redefine the date
$aDate = explode('-', $dateParts[0]);
$newDate = array($aDate[0], $aDate[1], $aDate[2], $dateParts[1], $dateParts[2]);
$dateParts = $newDate;
}
}
}
/*
* Simply check to see if the first element in the dateParts
* array is an integer or not.
* Since the day of week is optional, this check is needed.
*/
if (!is_numeric(trim($dateParts[0]))) {
/* cope with broken mailers that send "Tue,23" without space */
if (preg_match('/^\\w+,(\\d{1,2})$/', $dateParts[0], $match)) {
/* replace Tue,23 with 23 */
$dateParts[0] = $match[1];
} else {
/* just drop the day of week */
array_shift($dateParts);
}
}
/* calculate timestamp separated from the zone and obs-zone */
$stamp = strtotime(implode(' ', array_splice($dateParts, 0, 4)));
if (!isset($dateParts[0])) {
$dateParts[0] = '+0000';
}
if (!preg_match('/^[+-]{1}[0-9]{4}$/', $dateParts[0])) {
/* zone in obs-zone format */
if (preg_match('/\\((.+)\\)/', $dateParts[0], $regs)) {
$obs_zone = $regs[1];
} else {
$obs_zone = $dateParts[0];
}
return getGMTSeconds($stamp, $obs_zone);
} else {
return getGMTSeconds($stamp, $dateParts[0]);
}
}
