Question

I have a quick question about this PHP function here.
What is the am after the SELECT query?
Also what does w mean in this query?

function download_redirect_torrent($winner_id)
{
    global $db, $setts;
    $output = array('url' => null, 'redirect' => false, 'display' => null);
    $winner_id = intval($winner_id);
    $media_details = $db->get_sql_row(
        "SELECT 
            am.*, w.is_dd, w.dd_active, w.dd_active_date 
        FROM  
            " . DB_PREFIX . "auction_media am, " . DB_PREFIX . "winners w 
        WHERE 
            am.auction_id=w.auction_id AND w.winner_id=" . $winner_id . " AND am.media_type=4"
    );
}

Answer 1

You are referring to MySQL aliases.

winners w, here w represent the winners table

so instead of writing:

winners.is_add, winners.dd_active_date

you can write in short:

w.is_add, w.dd_active_date

and the same goes for auction_media am.