PHP和Unix-Timestamp

Question

If I use echo date('Y-m-d H:i:s', $unixTime) to get a time and a date for a user to see, does it show the user a GMT time, or a time compatible with the place where he is?

I could use this: new DateTimeZone() and set up a timezone for the user. But what if I don't? Does PHP somehow know the user's timezone?

Answer 1

PHP uses the ini settings for the default timezone, if they are not set, the runtime will produce a warning.

http://php.net/manual/en/datetime.configuration.php

http://php.net/manual/en/function.date-default-timezone-get.php

You can use date_default_timezone_get() to get the current timezone from the ini.

The recommended way for time is to use a DateTime object while specifically setting the timezone for the object.

// use statements for classes outside of our namespace
use DateTime;
use DateTimeZone;

// declare a new DateTime and get the current unix Timestamp
$dt = new DateTime("now", new DateTimeZone("GMT"));
echo $dt->getTimestamp();