关于php多维数组的问题。急！！！在线等！！！

$result = "";
foreach( $guojia as $key=>$val ){
$result.= $key." ";
foreach( $val as $k=>$v ){
$result .= " ".$k." ";
$result .= implode(" ",$v);
}
$result .= "
";
}
echo $result;

foreach($guojia as $k=>$v){
echo $k;echo "
";
foreach($v as $z=>$t){
echo $z;echo "
";
foreach($t as $y){
echo $y;ECHO "
";
}
}
}

foreach($guojia as $k => $v){
	echo $k . " ";
	foreach($v as $k1 => $v1){
		echo $k1 . " ";
		foreach($v1 as $v2){
			echo $v2 . " ";
		}
	}
}