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多维数组断开插入数组的数组拼接

php

BenM · 技术社区 · 6 年前

我有以下数组结构:

$tpl = [
    'breadcrumbs' => [
        [ 'title' => 'Item Database', 'text' => 'Item Database', 'url' => SITE_DOMAIN.ADMIN_PATH.'/items/' ],
        [ 'title' => $category->name, 'text' => $category->name, 'active' => true ]
    ]
];

我试图插入一个元素之前最后一个元素,我想我可以用 array_splice 具体如下:

if( !is_null($category->category) )
{
    array_splice(
        $tpl['breadcrumbs'],
        1,
        0,
        [ 'title' => $category->category->name, 'text' => $category->category->name, 'url' => SITE_DOMAIN.ADMIN_PATH.'/items/' ]
    );
}

然而,这似乎使我试图插入的项变平(根据预期行为),并产生以下输出:

Array
(
    [0] => Array
        (
            [title] => Item Database
            [text] => Item Database
            [url] => https://local/qmdepot/admin/items/
        )

    [1] => Medical Department
    [2] => Medical Department
    [3] => https://local/qmdepot/admin/items/
    [4] => Array
        (
            [title] => Class 1
            [text] => Class 1
            [active] => 1
        )

)

而预期的产出应该是:

Array
(
    [0] => Array
        (
            [title] => Item Database
            [text] => Item Database
            [url] => https://local/qmdepot/admin/items/
        )
    [1] => Array
        (
            [title] => Medical Department
            [text] => Medical Department
            [url] => https://local/qmdepot/admin/items/
        )
    [2] => Array
        (
            [title] => Class 1
            [text] => Class 1
            [active] => 1
        )
)

我可以使用以下代码来实现这一点,但我觉得有点老套:

# Set up the breadcrumbs:
if( !is_null($category->category) )
{
    $tpl['breadcrumbs'][2] = $tpl['breadcrumbs'][1];
    $tpl['breadcrumbs'][1] = [ 'title' => $category->category->name, 'text' => $category->category->name, 'url' => SITE_DOMAIN.ADMIN_PATH.'/items/' ];
}

是否有任何方法可以在指定索引处将数组项插入多维数组,而无需编写自定义函数或使用上面的技巧?

1 回复 | 直到 6 年前

user3942918 6 年前

因为要插入的项是数组,并且 array_splice 获取一个项目数组,将数组放入一个数组中。

另外,由于要在最后一个元素之前插入一些内容,因此可以使用负数作为偏移量,以便从末尾向后计数。(效果与您获得的数据相同,但对不同大小的数组很重要。)

array_splice(
    $tpl['breadcrumbs'],
    -1,
    0,
    [[ 'title' => $category->category->name, 'text' => $category->category->name, 'url' => SITE_DOMAIN.ADMIN_PATH.'/items/' ]]
);