timestamp
- The number of seconds from January 1, 1970 0:0:00 seconds to the specified time, timestamp is of integer data type.
- PHP timestamps are the maximum representation from 1970 to around January 27, 2038
set time zone
- The default time of the server is the national unified time, Greenwich, so you need to set the time zone of the current server before using the server.
- php.ini configuration file date.timezone=Asia/Shanghai or date.timezone=ETC/GMT-8 (PRC)
- Set date_default_timezone_set('PRC') directly with the function
related functions
time() can get the current timestamp
date() formats a timestamp