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PHP get, set and convert Timezone

Set the timezone for the script:

define('TIMEZONE', 'Asia/Calcutta'); // INDIA
date_default_timezone_set(TIMEZONE);

Get the default (script) timezone: date_default_timezone_get();

Get ini set timezone: ini_get('date.timezone');

Get timezone name: date("T");

Set timezone example: date_default_timezone_set('Europe/London'); // GMT

GMT to IST conversion example:

$event_length = 330; // IST is 5:30 ahead of GMT, so add 330 minutes
$timestamp = strtotime(date("H:i:s"));
$etime = strtotime("+$event_length minutes", $timestamp);
$ist_time = date('H:i:s', $etime);
echo '<br>'.'GMT - IST: '.$ist_time;
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