如何在PHP中计算MySQL时间戳和当前时间之间的差异

Question

I'm trying to calculate the difference between a timestamp retrieved from a MySQL database and the current time.

Appreciate the help.

Answer 1

As mentioned by @RemoteSojourner, I got the current time in a UNIX timestamp format (which returns time in seconds), I got the timestamp from the DB (using an ORM) and converted that to a UNIX timstamp too and then subtracted the two timestamps.

            $current_time = strtotime("now");
            $last_access_time = strtotime($this->last_access);
            $inactivity_duration = $current_time - $last_access_time;

Answer 2

This example makes the difference between now and one hour ago.

select timediff(now(), now() - interval 1 hour)

Answer 3

您可以使用strtotime函数将MySQL时间戳解析为Unix时间戳，可以在PHP日期函数中进一步解析或格式化。

Answer 4

Retrieve the datetime from mysql like this

SELECT UNIX_TIMESTAMP(`time_col`) FROM `tablename`...

AND compare it to time()