Why is PHP timestamp a Unix timestamp? Solution Solutions

Why is PHP timestamp a Unix timestamp?
Why is PHP timestamp a Unix timestamp?

------Solution--------------------
Because he returned the timestamp in the UNIX timestamp format.
--
The UNIX timestamp is the number of seconds that have elapsed since the start of the January 1, 1970 (Midnight of Utc/gmt), regardless of the leap seconds.
------Solution--------------------
Cite the Landlord Cy14yang post:
Why is PHP timestamp a Unix timestamp?

------Solution--------------------
Explore
Cite the Landlord Cy14yang post:
Why is PHP timestamp a Unix timestamp?


Because PHP's internal time is January 1, 1970 to the current number of seconds, PHP is also returning Unix time-cut (PHP manual), so is the Unix time-cut.

This question does not seem to be a problem????

------Solution--------------------
Are the same.
------Solution--------------------
One is built on the basis of another existence and according to the established rules!
------Solution--------------------
Most programs now use UNIX timestamps, and PHP one
A lot of programming has been developed from UNIX.

------Solution--------------------
I know the landlord's meaning, he just want to know why PHP must use the UNIX timestamp standard, nn ... Upstairs gave the answer.
------Solution--------------------
LZ is the title of a wrong word just .... become = "called"

