用php输出N维数组

?php

function wuxian($arr)
{
foreach($arr as $id => $v){
if(is_array($v))
{
wuxian($v);
}
else{
echo $v."<br>";
}
}
}

$array=array('1','2','3','4',array("8",array("5"),"6","7",array("19",array("234","45"))));

wuxian($array);

?>