如何利用php语法将时间戳转换为不同时区的时间

$timestamp = time();
$target_timezone = new DateTimeZone('Asia/Shanghai'); //亚洲上海时区
$date_time = new DateTime('@' . $timestamp);
$date_time->setTimeZone($target_timezone);
$beijing_time = $date_time->format('Y-m-d H:i:s');
echo $beijing_time;