得到所有最新的孩子

时间:2011-09-05 14:35:17

标签: php recursion

我需要一些帮助。我对算法的了解很少。我不能在PHP中编写一个返回所有最新子节点的递归函数。

假设我们的数组如下所示:

Array
(
[0] => Array
    (
        [id_category] => 1
        [name] => Accueil
        [id_parent] => 0
    )

[1] => Array
    (
        [id_category] => 2
        [name] => Accessoires
        [id_parent] => 1
    )

[2] => Array
    (
        [id_category] => 3
        [name] => Merchandising
        [id_parent] => 1
    )

[3] => Array
    (
        [id_category] => 4
        [name] => Pièces détachées
        [id_parent] => 1
    )

[4] => Array
    (
        [id_category] => 5
        [name] => Excavateur
        [id_parent] => 4
    )

[5] => Array
    (
        [id_category] => 6
        [name] => série 100
        [id_parent] => 5
    )

[6] => Array
    (
        [id_category] => 7
        [name] => above
        [id_parent] => 6
    )

[7] => Array
    (
        [id_category] => 8
        [name] => système hydraulique
        [id_parent] => 7
    )

[8] => Array
    (
        [id_category] => 9
        [name] => série 200
        [id_parent] => 5
    )

[9] => Array
    (
        [id_category] => 10
        [name] => thru
        [id_parent] => 6
    )

[10] => Array
    (
        [id_category] => 11
        [name] => Compaction
        [id_parent] => 4
    )

[11] => Array
    (
        [id_category] => 12
        [name] => système électrique
        [id_parent] => 7
    )

)

我想getLastChildren(5)或getLastChildren(6)或getLastChildren(7),该函数返回一个答案数组(“8”,“12”)

我会试着举个例子。

如果我选择5类:= 6和9是孩子。

我透过孩子看。孩子6有两个孩子,7和10,孩子9:没有孩子。

我在孩子名单中加了9个。

7岁的孩子有两个孩子,8岁和12岁.8岁没有孩子。 12没有孩子。我加8和12.

所以我们返回(9,8,12)10没有孩子。我还补充道。

最后我(9,8,12,10)

那么我会做什么,如果我搜索“类别7中的所有最后一个孩子”=> 8和12.我希望我的解释“更清楚一点。”

1 个答案:

答案 0 :(得分:2)

我会做那样的事情:

$array = array(
    array (
        'id_category' => 1,
        'name' => 'Accueil',
        'id_parent' => 0,
    ),
    array (
        'id_category' => 2,
        'name' => 'Accessoires',
        'id_parent' => 1,
    ),
    array (
        'id_category' => 3,
        'name' => 'Merchandising',
        'id_parent' => 1,
    ),
    array (
        'id_category' => 4,
        'name' => 'Pièces détachées',
        'id_parent' => 1,
    ),
    array (
        'id_category' => 5,
        'name' => 'Excavateur',
        'id_parent' => 4,
    ),
    array (
        'id_category' => 6,
        'name' => 'série 100',
        'id_parent' => 5,
    ),
    array (
        'id_category' => 7,
        'name' => 'above',
        'id_parent' => 6,
    ),
    array (
        'id_category' => 8,
        'name' => 'système hydraulique',
        'id_parent' => 7,
    ),
    array (
        'id_category' => 9,
        'name' => 'série 200',
        'id_parent' => 5,
    ),
    array (
        'id_category' => 10,
        'name' => 'thru',
        'id_parent' => 6,
    ),
    array (
        'id_category' => 11,
        'name' => 'Compaction',
        'id_parent' => 4,
    ),
    array (
        'id_category' => 12,
        'name' => 'système électrique',
        'id_parent' => 7,
    ),
);

我分割数据和代码,这是代码:

$children = array();
function getLastChildren($array, $parent) {
global $children;
    foreach ($array as $key => $value) {
        if ($value['id_parent'] == $parent) {
            if (hasChild($array, $value['id_category'])) {
                getLastChildren($array, $value['id_category']);
            } else {
                $children[] = $value['id_category'];
            }
        }
    }
}

function hasChild($array, $parent) {
    foreach ($array as $key => $value) {
        if ($value['id_parent'] == $parent) {
            return true;
        }
    }
    return false;
}

getLastChildren($array, 5);
print_r($children);

<强>输出:

Array
(
    [0] => 8
    [1] => 12
    [2] => 10
    [3] => 9
)