我如何使用PHP更新mySQL，但前提是最近一次更新已超过24小时？

Question

I have a table of different users, but I want to be able to limit how frequently the user can update their own information. In the table, the timestamp is automatically updated when the user makes a change.

The page automatically updates their information with UPDATE edits SET EDITS=EDITS+1 WHERE ID='$sID' when it loads, but I would like for that to be ignored if the last update was less than 24hrs ago.

I'm not sure if that can be solved in UPDATE, or if there is a better alternative.

Thanks!

Answer 1

假设您最近更新的last_updated

UPDATE edits SET EDITS=EDITS+1 WHERE ID='$sID' AND DATE_SUB(NOW(), INTERVAL 24 HOUR)>last_updated

Answer 2

You will need to add a column to the database containing the last update. Let's assume it's called last_update and DATETIME format.

$one_day_ago = strtotime('24 hours ago');

Then run this query:

UPDATE edits SET EDITS=EDITS+1 WHERE ID='$sID' AND last_update <= FROM_UNIXTIME('$one_day_ago')