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Asked:2020-07-02 22:47:38 +0800 CST2020-07-02 22:47:38 +0800 CST

如何拉嵌套数组

  • 772

有这样一个数组：

"params" => array:6 
        1 => "7"
        2 => "10"
        3 => "19"
        4 => "22"
        5 => "29"
        6 => array:3 
          0 => "33"
          1 => "35"
          2 => "36"
]

如何使嵌套数组的值33,35,36与前 6 个数组值齐平？
Collection中是否有合适的方法，还是使用常规php更容易？
事先不知道嵌套数组将在哪个键下。
它需要是这样的：

"params" => array:8 
       1 => "7"
       2 => "10"
       3 => "19"
       4 => "22"
       5 => "29"
       6 => "33"
       7 => "35"
       8 => "36"
]
php

2 个回答

  1. 如果您使用的是Laravel，那么该集合有一个方法.flatten()

    $params = ["7", "10", "19", "22", "29", ["33", "35", "36"]];

$collection = collect($params);

$flattened = $collection->flatten();

$result = $flattened->all();

print_r($result);

/* Выведет:

Array
(
    [0] => 7
    [1] => 10
    [2] => 19
    [3] => 22
    [4] => 29
    [5] => 33
    [6] => 35
    [7] => 36
)

*/
    • 2
  2. Best Answer
    <?php

$params = [
    1 => "7",
    2 => "10",
    3 => "19",
    4 => "22",
    5 => "29",
    6 => [
        0 => "33",
        1 => "35",
        2 => "36",
    ],
];

$paramsOnFirstLevel = arrayValuesRecursive($params);

var_export($paramsOnFirstLevel);
/**
Выведется

array (
    0 => '7',
    1 => '10',
    2 => '19',
    3 => '22',
    4 => '29',
    5 => '33',
    6 => '35',
    7 => '36',
)
 */

function arrayValuesRecursive($arr)
{
    $result = [];

    foreach ($arr as $value) {
        if (!is_array($value)) {
            $result[] = $value;
        } else {
            $result = array_merge($result, arrayValuesRecursive($value));
        }
    }

    return $result;
}
    • 1

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