Question

我正在尝试从URL解析字符串并将其转换为PHP数组，但是到目前为止，我还无法使其正常工作。该字符串包含逗号分隔的值，然后将这些值按句点分组，例如：

course.id,course.title,course.author,course.duration,course.trailer.video_key,course.trailer.duration,course.lessons.id,course.lessons.title,track.id,track.title,track.caption.srt,track.caption.vtt,track.caption.text

等效于此字符串的数组为：

PHP：

$array = [
    'course' => [
        'id',
        'title',
        'author',
        'duration',
        'trailer' => [
            'video_key',
            'duration'
        ],
        'lessons' => [
            'id',
            'title'
        ]
    ],
    'track' => [
        'id',
        'title',
        'caption' => [
            'srt',
            'vtt',
            'text'
        ]
    ]
];

我当前的解决方案是：

PHP：

$string = 'course.id,course.title,course.author,course.duration,course.trailer.video_key,course.trailer.duration,course.lessons.id,course.lessons.title,track.id,track.title,track.caption.srt,track.caption.vtt,track.caption.text';
$parameters = explode( ',', $string );

$array = array();
$inset = array();

foreach ( $parameters as $parameter ) {

    $segments = explode( '.', $parameter );

    if ( ! array_key_exists( $segments[0], $inset ) ) {
        $array[ $segments[0] ] = array();
        $inset[ $segments[0] ] = true;
    }

    $array[ $segments[0] ] = array_merge( $array[ $segments[0] ], addSegment( $segments, 1 ) );

}

function addSegment( $segments, $counter ) {

    $results = array();

    if ( end( $segments ) == $segments[ $counter ] ) {
        return array( $segments[ $counter ] => null );
    }

    $results[ $segments[ $counter ] ] = addSegment( $segments, $counter + 1 );

    return $results;

}

但是，这有点奏效；它失败，出现像这样的简单字符串 course,track,lessons

我认为这需要递归，但是我不太擅长写这篇文章，所以我希望有人已经这样做并且可以为我提供帮助。

谢谢。

Answer 1

您无需递归即可实现此目的-只需执行两次循环并使用&：

$arr = explode(",", "course.id,course.title,course.author,course.duration,course.trailer.video_key,course.trailer.duration,course.lessons.id,course.lessons.title,track.id,track.title,track.caption.srt,track.caption.vtt,track.caption.text");
foreach($arr as $e) {
    $e = explode(".", $e);
    $obj = &$res; //set the current place root
    while(count($e) > 1) { // last element will be add as value
        $key = array_shift($e);
        if (!isset($obj[$key]))
            $obj[$key] = [];
        $obj = &$obj[$key]; //reset the current place
    }
    $obj[] = array_shift($e); // add the last as value to current place
}

$res将包含您的愿望输出

将字符串转换为等效的多维数组

1 个答案: