Why is the PHP timestamp converted into a Unix timestamp? Solution

Why is the PHP timestamp converted into a Unix timestamp? Why is the PHP timestamp converted into a Unix timestamp ?, Because it returns a Unix timestamp. -- The Unix timestamp is the number of seconds that elapsed since January 1, January 1, 1970 (midnight UTC/GMT), not considering leap seconds ., Reference the post by cy14yang: Why is the PHP timestamp Un? why is the PHP timestamp Unix timestamp?
Why is the PHP timestamp converted into a Unix timestamp?

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Because it returns a Unix timestamp.
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The Unix timestamp is the number of seconds that have elapsed since January 1, January 1, 1970 (midnight UTC/GMT), regardless of the leap second.
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Reference the post of cy14yang:
Why is the PHP timestamp converted into a Unix timestamp?

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Discussion
Reference the post of cy14yang:
Why is the PHP timestamp converted into a Unix timestamp?


Because the internal time of PHP is the number of seconds from January 1, January 1, 1970 to the present, PHP returns the Unix time cut (PHP Manual), so it is the Unix time cut.

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

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They are all the same.
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One is generated based on the other!
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Most programs now use Unix timestamps.
Many programming things have evolved from Unix.

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I know what the landlord means. he just wants to know why PHP has to use UNIX timestamps as a standard ...... Answers are provided upstairs
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Lz is a wrong question .... Become = "called"