Question

我有一个像这样的大型多维数组

Array
(
    [/] => Array
        (
            [0] => d:Cover & Label:0
            [1] => d:INFO TBS:0
            [2] => d:VIDEO TS:0
        )

    [/Cover & Label/] => Array
        (
            [0] => f:This Is 40 (2012) cover.jpg:197602
            [1] => f:This Is 40 (2012) label.jpg:274893
            [2] => f:This Is 40 (2012) poster.jpg:50100
        )

    [/INFO TBS/] => Array
        (
            [0] => f:This Is 40 (2012) INFORMATIE .txt:1333
            [1] => f:Torrent Downloaded from SilverTorrents.me.txt:41
            [2] => f:Torrent downloaded from Demonoid.com.txt:47
            [3] => f:Torrent_downloaded_from_AhaShare.com.txt:107
            [4] => f:Tracked by H33T.com.txt:19
            [5] => f:silver torrent logo.jpg:64109
            [6] => f:tracked By movie-torrentz.txt:36
        )

    [/VIDEO TS/] => Array
        (
            [0] => f:VIDEO_TS.BUP:12288
            [1] => f:VIDEO_TS.IFO:12288
            [2] => f:VIDEO_TS.VOB:59392
            [3] => f:VTS_01_0.BUP:18432
            [4] => f:VTS_01_0.IFO:18432
            [5] => f:VTS_01_0.VOB:59392
            [6] => f:VTS_01_1.VOB:39620608
            [7] => f:VTS_02_0.BUP:88064
            [8] => f:VTS_02_0.IFO:88064
            [9] => f:VTS_02_0.VOB:59392
            [10] => f:VTS_02_1.VOB:1073709056
            [11] => f:VTS_02_2.VOB:1073709056
            [12] => f:VTS_02_3.VOB:1073709056
            [13] => f:VTS_02_4.VOB:1073709056
            [14] => f:VTS_02_5.VOB:295792640
        )

)

如何创建像这样的较小尺寸的数组。

Array
(
    [/] => Array
        (
            [0] => d:Cover & Label:0
            [1] => d:INFO TBS:0
            [2] => d:VIDEO TS:0
        )

    [/Cover & Label/] => Array
        (
            [0] => f:This Is 40 (2012) cover.jpg:197602
            [1] => f:This Is 40 (2012) label.jpg:274893
            [2] => f:This Is 40 (2012) poster.jpg:50100
        )
)

我想创建一个较小的数组，其中包含json_encoded（$ array）＆lt; = 255

的strlen

到目前为止，我已设法做到这一点，

<?php
$small_array_new = array();
foreach($DATA as $key => $mini_array){

        foreach($mini_array as $mini_array_element){

                if(strlen(json_encode($small_array_new)) <= 255){
                $small_array_new[$key][] = $mini_array_element;
                }

                if(strlen(json_encode($small_array_new)) > 255){
                array_pop($small_array_new[$key] );
                break;
                }
            }
}

但是，在strlen达到255并且没有完全突破并给我这样的输出后，这并没有停止。

Array
(
    [/] => Array
        (
            [0] => d:Cover & Label:0
            [1] => d:INFO TBS:0
            [2] => d:VIDEO TS:0
        )

    [/Cover & Label/] => Array
        (
            [0] => f:This Is 40 (2012) cover.jpg:197602
            [1] => f:This Is 40 (2012) label.jpg:274893
            [2] => f:This Is 40 (2012) poster.jpg:50100
        )

    [/INFO TBS/] => Array
        (
        )

    [/VIDEO TS/] => Array
        (
            [0] => f:VIDEO_TS.BUP:12288
        )

)

如果strlen（json_encode（$$ small_array_new））＆gt; 255？

更新：使用中断2后;

Array
(
    [/] => Array
        (
            [0] => d:Cover & Label:0
            [1] => d:INFO TBS:0
            [2] => d:VIDEO TS:0
        )

    [/Cover & Label/] => Array
        (
            [0] => f:This Is 40 (2012) cover.jpg:197602
            [1] => f:This Is 40 (2012) label.jpg:274893
            [2] => f:This Is 40 (2012) poster.jpg:50100
        )

    [/INFO TBS/] => Array
        (
        )

)

Answer 1

您可以将要停止的循环次数传递给break语句。

您想要中断两个foreach循环，因此请使用break 2;。

修改我明白了......当它排空时你必须删除它。你可以使用例如

if(strlen(json_encode($small_array_new)) > 255){ array_pop($small_array_new[$key] ); if (count($small_array_new[$key]) == 0) unset($small_array_new[$key]); break 2; }

Answer 2

我推荐你来自Athari（或其他LINQ库）的YaLinqo库。它使用一行代码完成此类任务。

Answer 3

我找到了一个用于n维数组的小函数

function junkArray2Json($data, $len = 255, &$scope = null, &$root = null)
{
    if (!is_array($data)) {
        $scope = $data;
        return $scope;
    }

    if ($isInitialCall = is_null($root)) {
        $root = array();
        $scope = &$root;
    } else {
        $scope = array();
    }

    foreach ($data as $key => $value) {
        $rootCopy = unserialize(serialize($root));
        $scopeCopy = unserialize(serialize($scope));
        junkArray2Json($value, $len, $scope[$key], $root);

        if (empty($scope[$key])) {
            unset($scope[$key]);
        }

        if (strlen(json_encode($root)) > $len) {
            $root = $rootCopy;
            $scope = $scopeCopy;
        }
    }

    return $scope;
}

print_r(junkArray2Json($DATA, 255));

打印

Array
(
    [/] => Array
        (
            [0] => d:Cover & Label:0
            [1] => d:INFO TBS:0
            [2] => d:VIDEO TS:0
        )

    [/Cover & Label/] => Array
        (
            [0] => f:This Is 40 (2012) cover.jpg:197602
            [1] => f:This Is 40 (2012) label.jpg:274893
            [2] => f:This Is 40 (2012) poster.jpg:50100
        )

    [/VIDEO TS/] => Array
        (
            [0] => f:VIDEO_TS.BUP:12288
        )

)

如何从大型多维数组制作小型多维数组？

3 个答案: