您如何处理 PHP 中的时区差异计算?

How do you handle timezone difference calculation in PHP?(您如何处理 PHP 中的时区差异计算?)

问题描述

有人告诉我，以下计算用户当地时间的方法有时不起作用.在 PHP 中执行此操作的最佳方法是什么?你是做什么的?

I'm being told that this below method of calculating the user's local time is sometimes not working. What's the best way to do this in PHP? What do you do?

public function getTimeOffset ($time) {
    $this->_cacheTimeOffset();  
    if ($this->timeOffsetExecuted) {
        $d = date("O");
        $neg = 1;

        if (substr($d, 0, 1) == "-") {
            $neg = -1;
            $d = substr($d, 1);
        }

        $h = substr($d, 0, 2)*3600;
        $m = substr($d, 2)*60;

        return $time + ($neg * ($h + $m) * -1) + (($this->timeOffset + $this->getDstInUse()) * 3600);
    }
    return $time;
}

推荐答案

使用 DateTime 扩展，例如 日期时间::getOffset,
或 DateTimeZone::getOffset

Use the DateTime extension, such as DateTime::getOffset,
or DateTimeZone::getOffset

某些国家/地区可能会执行多次时区更新，
这个方法DateTimeZone::getTransitions 显示转换历史

Some countries might have perform several timezone update,
this method DateTimeZone::getTransitions reveal the transition history

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