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Editorial Team
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Asked: 2026-06-09T22:43:28+00:00

I need to be able to only insert a row if the data doesn’t

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I need to be able to only insert a row if the data doesn’t already exist, except for the date column, which would always be different, so it will always insert a new row even though it shouldn’t.

my code:

$postID = $_POST['postID']; //example, 817
$userID = logged_in(); //example, 2
$date = time();

mysql_query("INSERT IGNORE INTO likes SET userID='$userID', postID='$postID', date='$date'");

I would like to be able to do something like:

mysql_query("INSERT IGNORE date INTO likes SET userID='$userID', postID='$postID', date='$date'");
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1 Answer

  1. Editorial Team

    If you have a UNIQUE constraint on userID and postID you can do whatever you’re doing now, the date column would not get updated if there’s already a record.

    If you want to have the date column updated if the record does exist (for that particular user and post) you can use ON DUPLICATE KEY UPDATE date = '$date'.

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