Question

我有一个多级数组

$array = array("14529" => array("900" => array("87" => array() ) ) );

print_r(array_keys($array)); // result array("14529");

如何将此数组合并到单个数组

$array = array("14529", "900", "87");

Answer 1

这是一个可以完成你想要的功能。它以递归方式完成，因此数组的深度无关紧要。

function mergeArrayMultiKeyToSingleArray($array, $result=[])
{
    foreach($array as $key => $value) {
        $result[] = $key;
        if(is_array($value)) {
            $result = mergeArrayMultiKeyToSingleArray($value, $result);
        }
    }

    return $result;
}

// USAGE:
$array = array("14529" => array("900" => array("87" => array() ) ) );
$array = mergeArrayMultiKeyToSingleArray($array);
// $array is now ["14529", "900", "87"]

Answer 2

使用RecursiveIteratorIterator类的解决方案：

$arr = ["14529" => ["900" => ["87" => [] ] ] ];
$keys = [];
foreach (new RecursiveIteratorIterator(new RecursiveArrayIterator($arr), RecursiveIteratorIterator::SELF_FIRST) as $k => $v) {
    $keys[] = $k;
}

print_r($keys);

输出：

Array
(
    [0] => 14529
    [1] => 900
    [2] => 87
)

Answer 3

我是使用类

完成的

Pipeline

class ArrayStripper
{
    private $items = [];

    public function strip($arrayOrItem)
    {
        if(is_array($arrayOrItem))
        {
            foreach ($arrayOrItem as $item)
            {
                $this->strip($item);
            }
        }
        else
        {
            $this->items[] = $arrayOrItem;
        }
    }

    public function get()
    {
        return $this->items;
    }
}

如何将数组多键合并到单个数组

3 个答案: