PHP：使用Date Diff等搜索过去15分钟内已登录的用户

Question

This has been asked before, however I can not for the life of me find it on google or stackoverflow for a solution. I even entered this into my google search: php date("F j, Y, g:ia") date diff. So, I will ask it here.

I have a date set throughout my whole website that is set like this (done in PHP):

  date_default_timezone_set('US/Eastern');  
$CurLogIn = date("F j, Y, g:i a");

That date then gets SQL Updated into each users lastloginfield to basically check when it was the last time they accessed my page. I wanted to create a page which displays users that have been on a page on my site within the last 15 minutes. However, I cant find a Date Diff Solution for how I set up the time/date above.

Does anyone have a solution for how I can check for all users that have accessed a page within the last 15 minutes using that time format above? Thanks.

Answer 1

填写您的字段和表格名称

SELECT * from table where NOW() - INTERVAL 15 MINUTE <lastloginfield

Answer 2

You can do this directly from SQL

SELECT * 
FROM user
WHERE (UNIX_TIMESTAMP(NOW()) - UNIX_TIMESTAMP(last_login) < (60 * 15))