douzhi1937
douzhi1937
2016-02-12 18:16
浏览 13
已采纳

在PHP中使用公共密钥合并数组

I'm merging a couple of arrays like this in PHP

//all the other stuff
$array1 = (array) $new;
$array2 =  (array) $info;
$ab = array('a' => $array1, 'b' => $array2);
print_r($ab);

print_r($ab) gives me something like this:

Array
(
    [a] => Array
        (
            [entries] => Array
                (
                    [0] => stdClass Object
                        (
                            [title] => Serial - This American Life
                            [id] => Serial is a podcast from the creators of This American Life, hosted by Sarah Koenig. 
                        )

                    [1] => stdClass Object
                        (
                            [title] => This American Life - This American Life
                            [id] => This American Life is a weekly public radio show, heard by 2.2 million people on more than 500 stations. 
                        )

                    [2] => stdClass Object
                        (
                            [title] => Real Crime Profile - Real Crime Profile
                            [id] => Podcast talking about criminal cases and personality profiling.
                        )

                )

        )

    [b] => Array
        (
            [entries] => Array
                (
                    [0] => stdClass Object
                        (
                            [artistName] => This American Life
                            [feedUrl] => http://feeds.serialpodcast.org/serialpodcast
                            [primaryGenreName] => News & Politics
                            [artworkUrl60] => http://is2.mzstatic.com/image/thumb/Music69/v4/70/c9/71/70c97133-f3a8-738e-ea2c-27a6dc7d9731/source/60x60bb.jpg
                        )

                    [1] => stdClass Object
                        (
                            [artistName] => This American Life
                            [feedUrl] => http://feed.thisamericanlife.org/talpodcast
                            [primaryGenreName] => Personal Journals
                            [artworkUrl60] => http://is5.mzstatic.com/image/thumb/Music4/v4/1f/b8/0f/1fb80f69-bd94-8cad-0a2f-b082541d5f64/source/60x60bb.jpg
                        )

                    [2] => stdClass Object
                        (
                            [artistName] => Real Crime Profile
                            [feedUrl] => http://feeds.soundcloud.com/users/soundcloud:users:202076064/sounds.rss
                            [primaryGenreName] => History
                            [artworkUrl60] => http://is5.mzstatic.com/image/thumb/Music69/v4/e4/0d/1e/e40d1efe-f625-8d15-4e2e-706fecead1e8/source/60x60bb.jpg
                        )

                )

        )

)

This is close to what I'm looking for, but ideally, I'd like to simplify this even more so I don't have an a and b "tree" within this array.

This is what I'm trying to end up with:

Array
(
    [a] => Array
        (
            [entries] => Array
                (
                    [0] => stdClass Object
                        (
                            [title] => Serial - This American Life
                            [id] => Serial is a podcast from the creators of This American Life, hosted by Sarah Koenig. 
                            [artistName] => This American Life
                            [feedUrl] => http://feeds.serialpodcast.org/serialpodcast
                            [primaryGenreName] => News & Politics
                            [artworkUrl60] => http://is2.mzstatic.com/image/thumb/Music69/v4/70/c9/71/70c97133-f3a8-738e-ea2c-27a6dc7d9731/source/60x60bb.jpg
                        )

                    [1] => stdClass Object
                        (
                            [title] => This American Life - This American Life
                            [id] => This American Life is a weekly public radio show, heard by 2.2 million people on more than 500 stations.
                            [artistName] => This American Life
                            [feedUrl] => http://feed.thisamericanlife.org/talpodcast
                            [primaryGenreName] => Personal Journals
                            [artworkUrl60] => http://is5.mzstatic.com/image/thumb/Music4/v4/1f/b8/0f/1fb80f69-bd94-8cad-0a2f-b082541d5f64/source/60x60bb.jpg
                        )

                    [2] => stdClass Object
                        (
                            [title] => Real Crime Profile - Real Crime Profile
                            [id] => Podcast talking about criminal cases and personality profiling.
                            [artistName] => Real Crime Profile
                            [feedUrl] => http://feeds.soundcloud.com/users/soundcloud:users:202076064/sounds.rss
                            [primaryGenreName] => History
                            [artworkUrl60] => http://is5.mzstatic.com/image/thumb/Music69/v4/e4/0d/1e/e40d1efe-f625-8d15-4e2e-706fecead1e8/source/60x60bb.jpg
                        )

                )

        )

)

I've also tried array_merge_recursive($array1['entries'],$array2['entries'], but this give me something like this (6 objects [2 from one array and 4 from the other] instead of 3):

Array
(
    [0] => stdClass Object
        (
            [title] => Serial - This American Life
            [id] => Serial is a podcast from the creators of This American Life, hosted by Sarah Koenig. Serial unfolds one story - a true story - over the course of a whole season. 
        )

    [1] => stdClass Object
        (
            [title] => This American Life - This American Life
            [id] => This American Life is a weekly public radio show, heard by 2.2 million people on more than 500 stations. 
        )

    [2] => stdClass Object
        (
            [title] => Real Crime Profile - Real Crime Profile
            [id] => Podcast talking about criminal cases and personality profiling.
        )

    [3] => stdClass Object
        (
            [artistName] => This American Life
            [feedUrl] => http://feeds.serialpodcast.org/serialpodcast
            [primaryGenreName] => News & Politics
            [artworkUrl60] => http://is2.mzstatic.com/image/thumb/Music69/v4/70/c9/71/70c97133-f3a8-738e-ea2c-27a6dc7d9731/source/60x60bb.jpg
        )

    [4] => stdClass Object
        (
            [artistName] => This American Life
            [feedUrl] => http://feed.thisamericanlife.org/talpodcast
            [primaryGenreName] => Personal Journals
            [artworkUrl60] => http://is5.mzstatic.com/image/thumb/Music4/v4/1f/b8/0f/1fb80f69-bd94-8cad-0a2f-b082541d5f64/source/60x60bb.jpg
        )

    [5] => stdClass Object
        (
            [artistName] => Real Crime Profile
            [feedUrl] => http://feeds.soundcloud.com/users/soundcloud:users:202076064/sounds.rss
            [primaryGenreName] => History
            [artworkUrl60] => http://is5.mzstatic.com/image/thumb/Music69/v4/e4/0d/1e/e40d1efe-f625-8d15-4e2e-706fecead1e8/source/60x60bb.jpg
        )

)

Thoughts on how to merge these into 3 objects?

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3条回答 默认 最新

  • dst3605528
    dst3605528 2016-02-12 18:45
    已采纳

    This is only an example, to explain how you can use function multiArrayCombine from my answer to another question:

    foreach( $array['a']['entries'] as &$val ) $val = (array) $val;
foreach( $array['b']['entries'] as &$val ) $val = (array) $val;

$result = multiArrayCombine( $array['a']['entries'], $array['b']['entries'], T_OBJECT_CAST );

$array['a']['entries'] = $result;
unset( $array['b'] );

print_r( $array );

    eval.in demo

    As I said, this is only an example: the function has the option to return objects but not to analyze it. You can modify it to process also objects and use it directly, without above first two lines.

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  • duankuang7928
    duankuang7928 2016-02-12 18:28

    Try

    for($i=0;$i<count($array1['entries']); $i++){
  $array3['entries'][$i] =(object) ((array) $array1['entries'][$i] + (array) $array2['entries'][$i]);
}
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  • doupin5667
    doupin5667 2016-02-12 18:31

    The function array_replace_recursive will do what you describe. The problem with array_merge_recursive is that when it encounters sequential arrays, it concatenates the values of the merged arrays, rather than overwriting those entries with the same index. array_replace_recursive is essentially the same thing but always treats arrays as associative and never concatenates them.

    http://php.net/manual/en/function.array-replace-recursive.php

    Since your leaf nodes are all stdObjects and array_merge_recursive won't merge objects, you will need to convert them to arrays first.

    Example:

    <?php

$a = [
        'entries' => [
                (object) [
                        'title' => 'Alpha',
                        'id' => 'Alpha ...'
                ],
                (object) [
                        'title' => 'Beta',
                        'id' => 'Beta ...'
                ]
        ]
];

$b = [
        'entries' => [
                (object) [
                        'artistName' => 'Alpha artist',
                        'feedUrl' => 'fdsfsdf'
                ],
                (object) [
                        'artistName' => 'Beta artist',
                        'feedUrl' => 'gfdsgfds'
                ]
        ]
];

function convert_objects($array) {
        array_walk_recursive($array, function(&$value) {
                $value = (array) $value;
        });
        return $array;
}

var_export(array_replace_recursive(convert_objects($a), convert_objects($b)));

    Which prints:

    array (
  'entries' => 
  array (
    0 => 
    array (
      'title' => 'Alpha',
      'id' => 'Alpha ...',
      'artistName' => 'Alpha artist',
      'feedUrl' => 'fdsfsdf',
    ),
    1 => 
    array (
      'title' => 'Beta',
      'id' => 'Beta ...',
      'artistName' => 'Beta artist',
      'feedUrl' => 'gfdsgfds',
    ),
  ),
)
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