Getting to the next key in an array

Question

Let's assume I know that there is key "twoVal", but I do not know what is after it. How do I get to the next key for that matter? Shoud I know the position of key "twoVal"? Or there is another way around?

$arr = array('Cool Viski' => array('oneVal' => '169304',
                                   'twoVal' => '166678',
                                   'threeVal' => '45134'));

Answer 1

$keys = array_keys($arr['Cool Viski']);
$position = array_search('twoVal', $keys);
if (isset($keys[$position + 1])) {
    $keyAfterTwoVal = $keys[$position + 1];
}

Answer 2

$arr = array('Cool Viski' => array('oneVal' => '169304',
                                   'twoVal' => '166678',
                                   'threeVal' => '45134'));
foreach($arr as $s=>$v){
    foreach($v as $val){
        if(key($v) == "twoVal"){
            $t=next($v);
            print "next key: ".key($v)."\n";
            print "next key value is: ".$t."\n";;
        }else{
            next($v);
        }
    }
}