[Jaxel]

Huh? I'm confused? What would I need to loop? Wouldn't this be enough?

$columns = $db->query_read("SHOW COLUMNS FROM table");
if (!in_array('column3', $columns))
{
    $db->query_write("ALTER TABLE table ADD COLUMN column3 int)");
}
if (!in_array('column4', $columns))
{
    $db->query_write("ALTER TABLE table ADD COLUMN column4 int)");
}

Thanks for the help BTW.