php - 如何压缩数组中的值？

Question

我有一个元素数组，我需要更改数组开头的元素，我正在使用 foreach。

Array
(
    [0] => Array
        (
            [0] => user
            [1] => address
            [2] => detail
            [3] => name
            [4] => family
        )

    [1] => Array
        (
            [0] => user
            [1] => address
        )

    [2] => Array
        (
            [0] => user
            [1] => address
            [2] => detail
            [3] => name
        )

)

我想要这个输出:

Array
(
    [0] => Array
        (
            [0] => user.address.detail.name
            [1] => family
        )

    [1] => Array
        (
            [0] => user
            [1] => address
        )

    [2] => Array
        (
            [0] => user.address.detail
            [1] => name
        )

)

这是我的代码，但它似乎不起作用。

    $firstTemp = "";
    foreach ($temps as $row => $temp) {
        if (count($temp) > 2) {
            foreach ($temp as $k => $content) {

                $firstTemp .= $content . '.';
                $endTemp = end($temp);
            }
        }
    }

是否有更好、更简洁的方法来实现这一点？

Answer 1

我对您的代码段进行了一些修改以使其正常工作，

$result    = [];
foreach ($temps as $row => $temp) {
    if (count($temp) > 2) {
        // I am taking a slice of the array except for last element and imploding it with `.`
        // then I am fetching the last element of an array
        //  creating an array and pushing it into the result variable
        $result[] = [implode(".", array_slice($temp, 0, count($temp) - 1)), end($temp)];
    }else{
        $result[] = $temp;
    }
}

我正在使用 array_slice 对除最后一个元素之外的所有元素进行内爆.
end 我曾经获取数组的最后一个元素。

Demo .

编辑 1
实现相同目标的另一种方法，

$result    = [];
foreach ($temps as $row => $temp) {
    if (count($temp) > 2) {
        // except last elements
        $result[] = [implode(".", array_slice($temp, 0, -1)), end($temp)];
    }else{
        $result[] = $temp;
    }
}

Demo .

编辑 2

$result    = [];
foreach ($temps as $row => $temp) {
    $result[] = (count($temp) > 2 ? [implode(".", array_slice($temp, 0, -1)), end($temp)] : $temp);
}

Demo .

编辑 3

$result = array_map(function($temp){
    return (count($temp) > 2 ? [implode(".", array_slice($temp, 0, -1)), end($temp)] : $temp);
},$temps);

Demo .

编辑 4:无条件

$result = array_map(function($temp){
    return [implode(".",array_slice($temp,0,-1)),array_pop($temp)];
},$temps);

编辑 5

$result = array_map(function($temp){
    return [implode(".",array_slice($temp,0,-1)),end($temp)];
},$temps);

Demo .

输出:

Array
(
    [0] => Array
        (
            [0] => user.address.detail.name
            [1] => family
        )

    [1] => Array
        (
            [0] => user
            [1] => address
        )

    [2] => Array
        (
            [0] => user.address.detail
            [1] => name
        )

)