php - 将 PHP 数组嵌套到 json

Question

所以我的代码在这里:

    $featurecollection = ("FeatureCollection");

        $test[] = array (
        "type" => $featurecollection,
        $features[] = array($images)

    );

   file_put_contents($cache,json_encode($test));

结果为以下 json:

[
 {
  "type":"feature",
  "0":[
     [
        {
           "title":"some title",
           "src":"value",
           "lat":"value",
           "lon":"value"
        },
        {
           "title":"some title",
             ...

但是我需要以不同的方式嵌套，并且我对如何构造 php 数组以得到如下结果感到困惑:

{
"type":"FeatureCollection",
 "features":[

  {
     "type":"Feature",
     "geometry":{
        "coordinates":[
           -94.34885,
           39.35757
        ],
        "type":"Point"
     },
     "properties":{
        "latitude":39.35757,
        "title":"Kearney",
        "id":919,
        "description":"I REALLY need new #converse, lol. I've had these for three years. So #destroyed ! :( Oh well. Can't wait to get a new pair and put my #rainbow laces through. #gay #gaypride #bi #proud #pride #colors #shoes #allstar #supporting ",
        "longitude":-94.34885,
        "user":"trena1echo5",
        "image":"http://images.instagram.com/media/2011/09/09/ddeb9bb508c94f2b8ff848a2d2cd3ece_7.jpg",
        "instagram_id":211443415
     }
  },

php 数组会是什么样的？一切都是嵌套的，但仍然有一个键值，这让我很困惑。

Answer 1

这是我在 PHP 中表示的方式:

array(
    'type' => 'FeatureCollection',
    'features' => array(
        array(
            'type' => 'Feature',
            'geometry' => array(
                'coordinates' => array(-94.34885, 39.35757),
                'type' => 'Point'
            ), // geometry
            'properties' => array(
                // latitude, longitude, id etc.
            ) // properties
        ), // end of first feature
        array( ... ), // etc.
    ) // features
)

所以为了得到这个结构，每个特征都必须是一个关联数组:

类型,

几何 - 一个关联数组:

坐标 - 值的索引数组，

类型

属性 - 纬度、经度、id 等值的关联数组。

在这种时候，我更喜欢区分列表( array(1, 2, 3) )和字典或 map ( array('a' => 1, 'b' => 2) )的语言。