Problem with timestamp output?

Question

PHP

There is one timestamp, I display it on different domains, the result is:
1 domain - echo date('dmY H:i:s', 1421234567); - 01/14/2015 14:22:47
2 domain - echo date('dmY H:i:s', 1421234567); - 01/14/2015 15:22:47
that is, the difference is 1 hour, I don’t know, maybe the settings are different there, well, for some reason I can’t understand how this can be, I thought that the timestamp is not affected by settings such as timezone, etc., why output at different times?

Answer 1

Well, how do they not affect it?
https://en.wikipedia.org/wiki/UNIX-%D0%B2%D1%80%D0...
At 00:00:00 UTC on January 1, 1970 (Thursday), UNIX time is zero.
Everyone has different time settings on the machine, after all. You need to save time with a shift.

Answer 2

Actually, it does.
Set first in code
date_default_timezone_set("Europe/Moscow");