我怎么能把某些行从CSV文件到JSON数组中的JSON对象?(PHP)

我正在使用CSV数据并使用PHP生成JSON，但我想知道是否有可能从CSV中获取某些行以在对象内创建数组，请参见下面的目标:

我有以下示例CSV数据:

songId, title, artists:name[1], artists:main[1], artists:name[2], artists:main[2]
"trk-01", "Track 1", "artist 1", "true", "artist 2", "false"
"trk-02", "Track 2", "artist 3", "true", "artist 4", "false"

(可以根据解决方案进行格式化)

下面的PHP被用来从上面的CSV创建JSON:

if (($handle = fopen('example.csv', 'r')) === false) {
    die('Error opening file');
}
$headers = fgetcsv($handle, 1024, ',');
$complete = array();
while ($row = fgetcsv($handle, 1024, ',')) {
    $complete[] = array_combine($headers, $row);
}
$completeobj = array("tracks" => $complete);
$result = array_merge($completeobj);
fclose($handle);
echo json_encode($result, JSON_PRETTY_PRINT);
$fp = fopen('results.json', 'w');
fwrite($fp, json_encode($result, JSON_PRETTY_PRINT));
fclose($fp);

生成的JSON如下:

{
    "tracks": [
        {
            "songId": "trk-01",
            "title": "Track 1",
            "artists:name[1]": "artist 1",
            "artists:main[1]": "true",
            "artists:name[2]": "artist 2",
            "artists:main[2]": "false"
        },
        {
            "songId": "trk-02",
            "title": "Track 2",
            "artists:name[1]": "artist 3",
            "artists:main[1]": "true",
            "artists:name[2]": "artist 4",
            "artists:main[2]": "false"
        }
    ]
}

但是我的目标是在CSV中获取那些'artists'行，并将它们的值放入对象artists中的数组中，参见下面的desired json:

{
    "tracks": [
        {
            "songId": "trk-01",
            "title": "track 1",
            "artists":
            [
                {
                   "name": "Artist 1",
                   "main": true              
                },
                {
                   "name": "Artist 2",
                   "main": false              
                }
            ]
        },
        {
            "songId": "trk-02",
            "title": "track 2",
            "artists":
            [
                {
                   "name": "Artist 3",
                   "main": true              
                },
                {
                   "name": "Artist 4",
                   "main": false              
                }
            ]
        }
    ]
}

如果有人可以建议实现这一点的方法或向我展示一个例子，可以帮助我弄清楚，这将是王牌!