print array in php recursively by all elements

function pretty_dump($arr, $d=1){
    if ($d==1) echo "<pre>";    // HTML Only
    if (is_array($arr)){
        foreach($arr as $k=>$v){
            for ($i=0;$i<$d;$i++){
                echo "\t";
            }
            if (is_array($v)){
                echo $k.PHP_EOL;
                Pretty_Dump($v, $d+1);
            } else {
                echo $k."\t".$v.PHP_EOL;
            }
        }
    }
    if ($d==1) echo "</pre>";   // HTML Only
}