How to refer to the n function argument if the number of arguments is unknown?

How to refer to the n function argument if the number of arguments is unknown?

<?php function foo() { $kolvo=func_num_args (); echo "Количество людей: <b>",$kolvo ,"</b><br/>"; for ($x=0;$x<$kolvo;$x++) { echo "Добрый день ", **"что сюда вставлять?"**,"<br/>"; } } foo("Вася","Петя","Таня","Маня"); ?>