Question

我有一个像这样的二维数组：

$array = [
    [..., "key"=>"key 1",...],
    [..., "key"=>"key 2",...],
    [..., "key"=>"key 2",...],
    [..., "key"=>"key 3",...],
    [..., "key"=>"key 3",...],
    [..., "key"=>"key 3",...],
];

我要从此数组中获得三维数组，并用相同的“键”值拆分，
像这样：

$array_output = [
    [
        [..., "key"=>"key 1",...],
    ],
    [
        [..., "key"=>"key 2",...],
        [..., "key"=>"key 2",...],
    ],
    [
        [..., "key"=>"key 3",...],
        [..., "key"=>"key 3",...],
        [..., "key"=>"key 3",...],
    ],
];

Answer 1

您可以使用array-reduce进行操作。考虑以下示例：

$arr = [];
$arr[] = array("key" => "key1", "v" => "a");
$arr[] = array("key" => "key2", "v" => "b");
$arr[] = array("key" => "key3", "v" => "c");
$arr[] = array("key" => "key2", "v" => "d");
$arr[] = array("key" => "key2", "v" => "e");

function reduceByKey($carry, $item) {
    $carry[$item["key"]][] = $item;
    return $carry;
}
$res = array_values(array_reduce($arr, "reduceByKey",[]));

现在$res将显示您的输出。请注意，$arr中的键顺序不相关。

Answer 2

最后，此功能符合我的期望：

protoc

但是，它返回键值对，例如：

mv protobuf/protoc-artifacts/target/linux/x86_64/protoc.exe protobuf/protoc-artifacts/target/linux/x86_64/protoc

但这对我来说没有问题:)

按键拆分PHP数组=>值

2 个答案: