"hidden", "name"=>"image_id", "value"=>$image->id]),
            INPUT(["type"=>"hidden", "name"=>"favorite_action", "value"=>$name]),
            INPUT(["type"=>"submit", "value"=>$label]),
        );
    }
    public function display_people($username_array)
    {
        global $page;
        $i_favorites = count($username_array);
        $html = "$i_favorites people:";
        reset($username_array); // rewind to first element in array.
        foreach ($username_array as $row) {
            $username = html_escape($row);
            $html .= "
$username";
        }
        $page->add_block(new Block("Favorited By", $html, "left", 25));
    }
    public function get_help_html()
    {
        return '
Search for images that have been favorited a certain number of times, or favorited by a particular individual.
favorites=1
Returns images that have been favorited once.
favorites>0
Returns images that have been favorited 1 or more times
Can use <, <=, >, >=, or =.
favorited_by:username
Returns images that have been favorited by "username".
favorited_by_userno:123
Returns images that have been favorited by user 123.