php - Cookie expiration is browser specific or server specific? -


i setting a cookie expiration time 

mktime(24,0,0).

my question simple. if browsers timezone different , cookie follow server's timezone expire or browser's timezone ?

the set-cookie header has timezone information part of expires datetime user agent knows when should expire.

set-cookie: sessiontoken=abc123; expires=wed, 09 jun 2021 10:18:14 gmt

from php docs setcookie

expire

...

note: may notice expire parameter takes on unix timestamp, opposed date format wdy, dd-mon-yyyy hh:mm:ss gmt, because php conversion internally.


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