所以我检查了 PHP 中支持的时区 列表，我是想知道如何将它们包含在 date() 函数中?谢谢！
So I've checked the list of supported time zones in PHP and I was wondering how could I include them in the date() function?
Thanks!
我不想要默认时区，每个用户都将他们的时区存储在数据库中，我采用用户的时区并使用它.如何?不过，我知道如何从数据库中获取它，而不是如何使用它.
I don't want a default timezone, each user has their timezone stored in the database, I take that timezone of the user and use it. How? I know how to take it from the database, not how to use it, though.
对于这样的任务，你真的应该使用 PHP 的 DateTime 类.请忽略所有建议您使用 date() 或 date_set_time_zone 的答案，这简直是糟糕且过时的.
For such task, you should really be using PHP's DateTime class. Please ignore all of the answers advising you to use date() or date_set_time_zone, it's simply bad and outdated.
我将使用伪代码进行演示，因此请尝试调整代码以满足您的需求.
I'll use pseudocode to demonstrate, so try to adjust the code to suit your needs.
假设变量 $tz 包含有效时区的字符串名称，变量 $timestamp 包含您希望根据时区格式化的时间戳，代码如下所示:
Assuming that variable $tz contains string name of a valid time zone and variable $timestamp contains the timestamp you wish to format according to time zone, the code would look like this:
$tz = 'Europe/London';
$timestamp = time();
$dt = new DateTime("now", new DateTimeZone($tz)); //first argument "must" be a string
$dt->setTimestamp($timestamp); //adjust the object to correct timestamp
echo $dt->format('d.m.Y, H:i:s');
DateTime 类很强大，并且要掌握它的所有功能 - 您应该花一些时间在 php.net 上阅读它.要完全回答您的问题 - 是的，您可以动态调整时区参数(在从 db 读取时的每次迭代中，您可以创建一个新的 DateTimeZone() 对象).
DateTime class is powerful, and to grasp all of its capabilities - you should devote some of your time reading about it at php.net. To answer your question fully - yes, you can adjust the time zone parameter dynamically (on each iteration while reading from db, you can create a new DateTimeZone() object).
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