PHP将数组更改为一维

生成数组格式的函数：

function buildTree(array $elements, $parentId = 0) {
    $branch = array();

    foreach ($elements as $element) {
        if ($element['parent_id'] == $parentId) {
            $children = buildTree($elements, $element['id']);
            if ($children) {
                $element['children'] = $children;
            }
            $branch[] = $element;
        }
    }

    return $branch;
}

$tree = buildTree($rows);

 Array
    (
        [0] => Array
            (
                [TASK_ID] => 2
                [PARENT_TASKID] => 0
                [TASK_LEVEL] => 0
                [children] => Array
                    (
                        [0] => Array
                            (
                                [TASK_ID] => 9
                                [PARENT_TASKID] => 2
                                [TASK_LEVEL] => 1
                            )

                        [1] => Array
                            (
                                [TASK_ID] => 10
                                [PARENT_TASKID] => 2
                                [TASK_LEVEL] => 1
                            )

                    )

            )

[1] => Array
        (
            [TASK_ID] => 1
            [PARENT_TASKID] => 0
            [TASK_LEVEL] => 0
            [children] => Array
                (
                    [0] => Array
                        (
                            [TASK_ID] => 4
                            [PARENT_TASKID] => 1
                            [TASK_LEVEL] => 1
                        )

                    [1] => Array
                        (
                            [TASK_ID] => 5
                            [PARENT_TASKID] => 1
                            [TASK_LEVEL] => 1
                            [children] => Array
                                (
                                    [0] => Array
                                        (
                                            [TASK_ID] => 6
                                            [PARENT_TASKID] => 5
                                            [TASK_LEVEL] => 2
                                        )

                                )

                        )

                )

        )
    )

生成的数组：

function buildTree(array $elements, $parentId = 0) {
    $branch = array();

    foreach ($elements as $element) {
        if ($element['parent_id'] == $parentId) {
            $children = buildTree($elements, $element['id']);
            if ($children) {
                $element['children'] = $children;
            }
            $branch[] = $element;
        }
    }

    return $branch;
}

$tree = buildTree($rows);

 Array
    (
        [0] => Array
            (
                [TASK_ID] => 2
                [PARENT_TASKID] => 0
                [TASK_LEVEL] => 0
                [children] => Array
                    (
                        [0] => Array
                            (
                                [TASK_ID] => 9
                                [PARENT_TASKID] => 2
                                [TASK_LEVEL] => 1
                            )

                        [1] => Array
                            (
                                [TASK_ID] => 10
                                [PARENT_TASKID] => 2
                                [TASK_LEVEL] => 1
                            )

                    )

            )

[1] => Array
        (
            [TASK_ID] => 1
            [PARENT_TASKID] => 0
            [TASK_LEVEL] => 0
            [children] => Array
                (
                    [0] => Array
                        (
                            [TASK_ID] => 4
                            [PARENT_TASKID] => 1
                            [TASK_LEVEL] => 1
                        )

                    [1] => Array
                        (
                            [TASK_ID] => 5
                            [PARENT_TASKID] => 1
                            [TASK_LEVEL] => 1
                            [children] => Array
                                (
                                    [0] => Array
                                        (
                                            [TASK_ID] => 6
                                            [PARENT_TASKID] => 5
                                            [TASK_LEVEL] => 2
                                        )

                                )

                        )

                )

        )
    )

如何将上述格式更改为以下格式：

Array
(
    [0] => Array
        (
            [TASK_ID] => 2
            [PARENT_TASKID] => 0
        )

    [1] => Array
        (
            [TASK_ID] => 9
            [PARENT_TASKID] => 2
        )

    [2] => Array
        (
            [TASK_ID] => 10
            [PARENT_TASKID] => 2
        )

)

请输入以下代码：

$flat = call_user_func_array('array_merge', $array);

及

$array=您的阵列
$result=call_user_func_数组（'array_merge'，$array）；
回声“；
打印（结果）；

但似乎不起作用。请帮忙

谢谢。

<?php
echo '<pre>';
print_r($arr);
echo '</pre>';
?>

尝试输出：

function multi_array($array)
{
    $new = array();
    foreach($array as $key=>$elem)
    {
        if(is_array($elem))
        {
            foreach($elem as $x=>$val)
            {
                if(!is_array($val))
                {
                    $new[$x][$key] = $val;
                }
            }
        }
    }
    return $new;
}

---

希望，它对您有用。

在捕获多个文件时，我一直在使用它解析$\u文件

function makeOneDimensionArray(array $array, &$res = array())
{
    foreach($array as $arr)
    {
        $res[] = array(
            'TASK_ID' => $arr['TASK_ID'],
            'PARENT_TASKID' => $arr['PARENT_TASKID']
        );
        if(isset($arr['children']))
        {
            makeOneDimensionArray($arr['children'], $res);
        }

    }

    return $res;

}

$finalArr = makeOneDimensionArray($array);

print_r($finalArr);

用法非常基本

function flattenTree($tree)
{
    $flat = array();
    foreach ($tree as $item) {
        if (array_key_exists('children', $item)) {
            $children = $item['children'];
            unset($item['children']);
            $flat[] = $item;
            $flat = array_merge($flat, flattenTree($children));
        } else {
            $flat[] = $item;
        }
    }
    return $flat;
}

$flat = flattenTree($tree);

我希望它有助于

尝试以下代码：

---

我希望它能有所帮助。

您应该使用递归函数来展平树，就像您使用递归函数来构建树一样

---

你自己尝试过什么吗？你是如何生成数组的？您必须向我们提供更多信息以帮助您。还有你自己尝试过什么？请查看有问题的更新尝试这个为什么不投票？必须有向下投票的原因。输出->

Array（[0]=>Array（[TASK\u ID]=>2）[1]=>Array（[PARENT\u TASK ID]=>0））

添加阵列的var\u dump，以便我可以运行。

预期或现有阵列的var\u dump

？输出与预期不符。代码与预期接近。但我怀疑是否有两个任务的父任务ID=0将首先排序，然后再排序子任务。请查看问题中生成的数组。@slimshaddyyy:只需将array\u merge语句放入foreach循环中即可。查看我的编辑。输出是相同的，即使它是内部foreach。请看我的问题和生成的数组。它有两条父任务ID为0的记录。

function flattenTree($tree)
{
    $flat = array();
    foreach ($tree as $item) {
        if (array_key_exists('children', $item)) {
            $children = $item['children'];
            unset($item['children']);
            $flat[] = $item;
            $flat = array_merge($flat, flattenTree($children));
        } else {
            $flat[] = $item;
        }
    }
    return $flat;
}

$flat = flattenTree($tree);