switch ($vars['licensedetails']['attribution']) {
case 'show-if-possible':
echo sprintf(t("show_if_possible",4), $vars['author_line']);
break;
case 'show-mandatorily':
echo sprintf(t("show_mandatorily",4), $vars['author_line']);
break;
case 'do-not-show':
echo t("Do not show the author's name.",4);
break;
}
?>