[PHP7.4.11] 多次元配列

$ary = [
	"fruits" => ["apple", "banana"],
	"animal" => ["monkey", "cat"]
];

$ary["fruits"][] = "kui";

foreach($ary as $key => $value){
	echo "-" . $key . "<br>";
	foreach($value as $k => $v){
		echo $v . " ";
	}
	echo "<br>";
}

– 二次元配列の中に配列を入れたい

$ary = [
	"A商事" => [
		"注文1" => ["商品1", "500円", "3個", "1500円"],
		"注文2" => ["商品2", "600円", "2個", "1200円"]
	],
	"B商事" => [
		"注文3" => ["商品3", "700円", "1個", "700円"]
	]
];

$ary["B商事"]["注文4"] = ["商品4", "200円", "10個", "2000円"];

echo "<pre>";
var_dump($ary);
echo "</pre>";

これを呼び出したい

foreach($ary as $key => $value){
	echo "-". $key . "<br>";
	foreach($value as $k => $v){
		echo $k. ":";
		foreach($v as $n => $data){
			echo $data . " ";
		}
	}
	echo "<br>";
}

OK、　これに$keyごとの小計を加えたい