How to find the highest value in a multidimensional array?

Question

I have following array:

$ar3 = array(123, array(12, 665, array(77, 255, 98, 56), 8), 1155, 676);

I need to compare all of its elements with

Answer 1

 $max ) {
        $max =  $array;
    }
}
echo "  max = $max \n " ;
?>

Live Demo