如何将 CSV 文件中的某些行放入 JSON 对象中的 JSON 数组中？ (PHP)

Question

我正在获取 CSV 数据并使用 PHP 生成 JSON，但我想知道是否可以从 CSV 中获取某些行来在对象中创建数组，请参阅下面的目标以清楚地了解：

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"

（可以根据解决方案对其进行格式化）

以下 PHP 用于从上述 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);

这会生成如下所示的 JSON：

{
    "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"
        }
    ]
}

但我的目标是在 CSV 中获取那些“艺术家”行并将它们的值放入对象艺术家中的数组中，请参阅下面的所需 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              
                }
            ]
        }
    ]
}

如果有人可以提出实现此目标的方法或向我展示一个可以帮助我弄清楚它的示例，那将是王牌！

Answer 1

在你的 json_encode 之前试试这个

$new_result = array();
foreach($result['tracks'] as $trackdata){
    $id = $trackdata['songId'];
    $title = $trackdata['title'];
    $name1 = $trackdata['artists:name[1]'];
    $name2 = $trackdata['artists:name[2]'];
    $main1 = $trackdata['artists:main[1]'];
    $main2 = $trackdata['artists:main[2]'];

    $new_result['tracks'][]=array(
        'songID'    => $id,
        'title'     => $title,
        'artists'   => array( 
            0 => array(
                'name' => $name1,
                'main' => $main1,
                ),
            1 => array(
                'name' => $name2,
                'main' => $main2,
            ),
        ),
    );
}