getdate function
Description: Can get date/time information
语法：array getdate( [ int timestamp ] )
Returns an array Example:
Array
(
[seconds] => 30
[minutes] => 59
[hours] => 10
[mday] => 31
[wday] => 2
[my] => 3
[year] =>2020
[yday] =>90
[weekday] => Tuesday
[month] => March
[0] => 1585623570
)