PHP通过多维关联阵列和打印项目迭代

Question

我有以下数组（从json解码）：

Array
(
    [playerInfo] => Array
        (
            [hint] => 
            [infoText] => Array
                (
                    [multiLineMode] => 
                    [subText1] => TLC
                    [subText2] => Christmas Pop
                    [title] => Sleigh Ride
                )
            [isPlayingInLemur] => 
            [lyrics] => 
            [mainArt] => Array
                (
                    [altText] => Album Art
                    [artType] => UrlArtSource
                    [contentType] => image/jpeg
                    [url] => https://images-na.sS500_.jpg
                )
            [mediaId] => 958d47b9:16
            [miniArt] => Array
                (
                    [altText] => Album Art
                    [artType] => UrlArtSource
                    [contentType] => image/jpeg
                    [url] => https://images-n._SS48_.jpg
                )
            [miniInfoText] => Array
                (
                    [multiLineMode] => 
                    [subText1] => TLC
                    [subText2] => Prime Music
                    [title] => Sleigh Ride
                )
            [playbackSource] => 
            [playingInLemurId] => 
            [progress] => Array
                (
                    [allowScrubbing] => 1
                    [locationInfo] => 
                    [mediaLength] => 223
                    [mediaProgress] => 80
                    [showTiming] => 1
                    [visible] => 1
                )
            [provider] => Array
                (
                    [artOverlay] => PRIME_SASH
                    [fallbackMainArt] => Array
                        (
                            [altText] => 
                            [artType] => IconArtSource
                            [iconId] => music-no-art
                            [iconStyles] => 
                        )
                    [providerLogo] => Array
                        (
                            [altText] => Amazon Music
                            [artType] => IconArtSource
                            [iconId] => amazon-music
                            [iconStyles] => 
                        )
                    [providerName] => Prime Music
                )
            [queueId] => 958d47
            [state] => PAUSED
            [template] => 
            [transport] => Array
                (
                    [layoutType] => MusicTransportLayout
                    [lyrics] => HIDDEN
                    [next] => ENABLED
                    [playPause] => ENABLED
                    [previous] => ENABLED
                    [repeat] => ENABLED
                    [shuffle] => ENABLED
                )
            [volume] => Array
                (
                    [muted] => 
                    [volume] => 40
                )
        )
)

我有以下foreach循环，它在Infotext数组中打印每个项目（4）。

<?php
    foreach ($player['playerInfo']['infoText'] as $music) {
        echo $music;
    }
?>

，但我希望能够在Infotext数组中仅打印[title]，[state]在playerInfo parent array中和卷数组中的[卷]。有一种优雅的方法吗？另外，由于我使用的是foreach，所以我只能获得这对的价值，但我也需要钥匙。这样，我可以打印所需的特定项目。

Answer 1

您可能需要尝试递归功能，因此您不必跟踪所有这些键。我在此示例中缩短了您的数组，但是无论尺寸如何，它都应该对您有用。只需提供在$ searchterms参数数组中获取值的钥匙。

function array_recursion(array $myarray, array $searchterms)
{
        foreach ($myarray as $key => $value)
        {
                if (is_array($value)) array_recursion($value, $searchterms);
                else if (in_array($key, $searchterms)) print $key . ": " . $value . "n";
        }
}
$myarray = Array(
        'playerInfo' => Array(
                'hint' => '',
                'infoText' => Array(
                        'multiLineMode' => '',
                        'subText1' => 'TLC',
                        'subText2' => 'Christmas Pop',
                        'title' => 'Sleigh Ride'
                ),
                'state' => 'PAUSED',
                'volume' => Array(
                        'muted' => '',
                        'volume' => 40
                        )
        )
);
array_recursion($myarray, Array('state', 'title', 'volume'));

Answer 2

看好像'infotext'是一个包含标题的数组，您会这样做：

<?php
foreach ($player as $key => $music) {
    echo $music['infoText']['title'];
}

，然后您也可以使用$key获取当前迭代的数组键。