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<?php
set_include_path(get_include_path() . PATH_SEPARATOR . '../lib');
/**
* Generate an associative of the PHP timezones and display text.
*
* @return array PHP Timezone => Displayed Description
*/
function generate_timezone_list() {
$php_timezones = DateTimeZone::listIdentifiers(DateTimeZone::ALL);
$offsets = array();
foreach ($php_timezones as $timezone) {
$tz = new DateTimeZone($timezone);
$offset = $tz->getOffset(new DateTime());
$offsets[$timezone] = "(UTC" . ($offset < 0 ? "-" : "+") . gmdate("H:i", abs($offset)) .
") " . $timezone;
}
asort($offsets);
return $offsets;
}
/**
* Set the timezone for the user.
*
* @return null
*/
function set_tz() {
$timezones = generate_timezone_list();
$update_cookie = false;
if (isset($_COOKIE["AURTZ"])) {
$timezone = $_COOKIE["AURTZ"];
} elseif (isset($_COOKIE["AURSID"])) {
$dbh = DB::connect();
$q = "SELECT Timezone FROM Users, Sessions ";
$q .= "WHERE Users.ID = Sessions.UsersID ";
$q .= "AND Sessions.SessionID = ";
$q .= $dbh->quote($_COOKIE["AURSID"]);
$result = $dbh->query($q);
if ($result) {
$timezone = $result->fetchColumn(0);
}
$update_cookie = true;
}
if (!isset($timezone) || !array_key_exists($timezone, $timezones)) {
$timezone = config_get("options", "default_timezone");
}
date_default_timezone_set($timezone);
if ($update_cookie) {
$timeout = intval(config_get("options", "persistent_cookie_timeout"));
$cookie_time = time() + $timeout;
setcookie("AURTZ", $timezone, $cookie_time, "/");
}
}
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