在PHP中提取多维数组的叶节点

Question

假设我在PHP中有一个看起来像这样的数组

array
(
   array(0)
   (
       array(0)
       (
         .
         . 
         .
       )

       .
       .
       array(10)
       (
         ..
       )
   )

   .
   . 
   .
   array(n)
   (

     array(0)
     (
     )
   )
 )

而且我需要将这个多维数组的所有叶子元素都变成一个线性数组,我应该如何在不借助递归的情况下这样做呢？

 function getChild($element)
 {

     foreach($element as $e)
     {

       if (is_array($e)
       {
          getChild($e);
       }
     }
 }

注意:上面的代码片段,可怕的未完成

更新:数组的示例

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [0] => Seller Object
                        (
                            [credits:private] => 5000000
                            [balance:private] => 4998970
                            [queueid:private] => 0
                            [sellerid:private] => 2
                            [dateTime:private] => 2009-07-25 17:53:10
                        )

                )

        )

...剪断.

[2] => Array
    (
        [0] => Array
            (
                [0] => Seller Object
                    (
                        [credits:private] => 10000000
                        [balance:private] => 9997940
                        [queueid:private] => 135
                        [sellerid:private] => 234
                        [dateTime:private] => 2009-07-14 23:36:00
                    )

            )

    ....snipped....

    )

)

Answer 1

实际上,有一个功能可以解决问题,请查看手册页:http://php.net/manual/en/function.array-walk-recursive.php

从页面改编的快速片段:

$data = array('test' => array('deeper' => array('last' => 'foo'), 'bar'), 'baz');

var_dump($data);

function printValue($value, $key, $userData) 
{
    //echo "$value\n";
    $userData[] = $value;
}


$result = new ArrayObject();
array_walk_recursive($data, 'printValue', $result);

var_dump($result);

Answer 2

您可以使用迭代器,例如:

$result = array();
foreach(new RecursiveIteratorIterator(new RecursiveArrayIterator($array), RecursiveIteratorIterator::LEAVES_ONLY) as $value) {
    $result[] = $value;
}