在mysql查询中使用纪元unix时间戳

Question

I'm trying to mark accounts inactive ( user_type = '1' ) which haven't signed in ( user_lastvisit ) within the last 90 days as inactive.

user_type tells phpbb if the account is 0 = active or 1 = inactive

user_lastvisit is the last time the user signed into the phpbb board. It is stored in epoch time format.

The problem: I can't figure out how to add 90 days to user_lastvisit (stored in epoch format) and see if it's less than the current time.

$result = mysql_query("UPDATE phpbb_users SET user_type = '1' WHERE DATE_ADD(FROM_UNIXTIME(user_lastvisit), INTERVAL 90 DAY) < NOW() AND user_type = '0'")
or die(mysql_error());

Update: I edited the query based on the suggestion below.

Answer 1

Take a look at FROM_UNIXTIME and DATE_ADD . With those two functions you should be able to convert the timestamp to a datetime and then use it to add 90 Days. Example:

SELECT * FROM yourtable WHERE DATE_ADD(FROM_UNIXTIME(user_lastvisit), INTERVAL 90 DAY) > NOW()

Answer 2

Rather than working directly in the database which isn't recommended by the phpBB developers you can do this via your Admin Control Panel.

Log into the ACP and select the Users and groups tab. At the bottom under User security select `Prune users'

In the Last active section set the drop down box to Before then enter the date from 90 days ago (as YYYY-MM-DD)

Below this, make sure Delete pruned user posts is set to No , and Deactivate or delete is set to Deactivate

Hit the Submit button and this will deactivate all accounts not used within the last 90 days.