multi arguments for function

Hi guys, I've 2 function as:
function a($arg1,$arg2,...,$argn){
echo '....';
}
and i dont know numbers of argument on function a() and i have a
array()
$arr = array('arg1,',arg2',.....,'argn');
now, how to get a('arg1','arg2',........,'argn') with
'arg1','arg2',......... are implements of array $arr;

http://php.net/manual/en/ref.funchand.php



--
----------------------------------
Iván Sánchez Ortega -ivan-algarroba-sanchezortega-punto-es-

You may my glories and my state dispose,
But not my griefs; still am I king of those.
-- William Shakespeare, "Richard II"