In which format should the timestamp be passed to a datetime field in a database?

When passing a timestamp to a datetime field in a database, it should be in the format "Y-m-d H:i:s". This format includes the year, month, day, hour, minute, and second in a specific order that is recognized by most databases. By using this format, you can ensure that the timestamp is properly stored in the datetime field without any conversion issues.

$timestamp = time(); // Get the current timestamp
$datetime = date("Y-m-d H:i:s", $timestamp); // Format the timestamp
// Insert $datetime into the datetime field in the database