php时区转换转换函数

godaddy主机在国外。把站点建站国外，显示时间时可能需要时区转换，下面是个方便的工具函数，用于时区转换

/*
 * 时区转换
 */

function toTimeZone($src, $from_tz = 'America/Denver', $to_tz = 'Asia/Shanghai', $fm = 'Y-m-d H:i:s') {
    $datetime = new DateTime($src, new DateTimeZone($from_tz));
    $datetime->setTimezone(new DateTimeZone($to_tz));
    return $datetime->format($fm);
}