過濾多維數組-filter_array（PHP）

Question

如何基於[channel]使用array_filter()過濾此多維數組？

Array
(
    [0] => Array
        (
            [268a9d2d25fc2b9765c7cd7b8a768d3e] => Array
                (
                    [dj_name] => Emilian
                    [show_name] => TechnoShow
                    [channel] => techno
                    [show_image] => http://www.digitalark.ro/dieselfm/wp-content/uploads/2016/01/avatar.jpg
                    [time] => 0
                    [time_end] => 1
                    [sun1] => 1
                    [sun2] => 1
                    [sun3] => 1
                    [sun4] => 1
                    [sun5] => 1
                )

        )

    [1] => Array
        (
            [e13268de7c56db42f8aeab2ab4c607f2] => Array
                (
                    [dj_name] => John Doe
                    [show_name] => John Doe`s Trance Show
                    [channel] => trance
                    [show_image] => http://www.digitalark.ro/dieselfm/wp-content/uploads/2016/01/dummy.jpg
                    [time] => 11
                    [time_end] => 11
                    [mon1] => 1
                    [mon2] => 1
                    [tue2] => 1
                    [mon3] => 1
                    [fri3] => 1
                    [mon4] => 1
                    [mon5] => 1
                )

        )

)

結果應僅包含值為“ techno”的數組，例如：

Array
(
    [0] => Array
        (
            [268a9d2d25fc2b9765c7cd7b8a768d3e] => Array
                (
                    [dj_name] => Emilian
                    [show_name] => TechnoShow
                    [channel] => techno
                    [show_image] => http://www.digitalark.ro/dieselfm/wp-content/uploads/2016/01/avatar.jpg
                    [time] => 0
                    [time_end] => 1
                    [sun1] => 1
                    [sun2] => 1
                    [sun3] => 1
                    [sun4] => 1
                    [sun5] => 1
                )

        ))

我試過使用：

$data = array_filter($dataraw, function($fs) use ($genre) {return $fs['channel'] == $genre});

編輯：

$djs = get_posts($args);
foreach ($djs as $dj) {
    $temp = maybe_unserialize(get_post_meta($dj->ID, 'show_data',true));
    if ($temp) $show_data[] = maybe_unserialize(get_post_meta($dj->ID, 'show_data',true));
}


$datax = array_filter($show_data, function($fs) use ($genre) {
 return array_values($fs)[0]['channel'] == $genre;
});

print_r($datax);

Answer 1

我假設您代碼中的解析錯誤是復制/粘貼錯誤。 問題在於傳遞到函數中的元素是一個更深的數組。 嘗試：

return current($fs)['channel'] === $genre;

另外，您可能希望使用===以使結果符合預期。