在 PHP 数组中 json 输出到 JSON 之后出现双配额

Question

我已经在

阅读了一个问题的答案

PHP Array to json, how to get rid of some double quotes?

我有同样的问题，但我的代码略有不同，所以我无法摆脱一些双引号。

我的代码：

$features = array();
$geojson = array(
    'type'      => 'FeatureCollection',
    'features'  => $features
 );
while($row = mysqli_fetch_assoc($result)) {
$type = $row['type'];
if($type == 'Point')
    {
        //$output = ;
            $feature = array(
        'type' => 'Feature',
         'properties' => array(
             'score' => "",
             'fid' => ""
        //Other fields here, end without a comma
            ),

      'geometry' => array(
        'type' => $type,
        'coordinates' => array($row['lat'], $row['lng'])
            )
        );
    }
else {
//$output = '['.$row['more_info'].']';
$feature = array(
        'type' => 'Feature',
         'properties' => array(
             'score' => "",
             'fid' => ""
        //Other fields here, end without a comma
            ),

      'geometry' => array(
        'type' => $type,
        'coordinates' => array('['.$row['more_info'].']')
            )
        );
}

    array_push($geojson['features'], $feature);
};
    mysqli_close($conn);
    echo $newgeojson =  json_encode($geojson, JSON_NUMERIC_CHECK);

array 输出转换为 json (json_encode):

Array
(
    [type] => FeatureCollection
    [features] => Array
        (
            [0] => Array
                (
                    [type] => Feature
                    [properties] => Array
                        (
                            [score] => 
                            [fid] => 
                        )

                    [geometry] => Array
                        (
                            [type] => Point
                            [coordinates] => Array
                                (
                                    [0] => 88.388786315918
                                    [1] => 22.551879205144
                                )

                        )

                )

            [1] => Array
                (
                    [type] => Feature
                    [properties] => Array
                        (
                            [score] => 
                            [fid] => 
                        )

                    [geometry] => Array
                        (
                            [type] => Polygon
                            [coordinates] => Array
                                (
                                    [0] => [[88.41796875, 22.568048815726],[88.41796875, 22.572804222704],[88.41796875, 22.577876475976],[88.428955078125, 22.578114233267],[88.428955078125, 22.573121244003],[88.428611755371, 22.568048815726],[88.41796875, 22.568048815726]]
                                )

                        )

                )

        )

)

我在 json_encode

之后得到的输出

{"type":"FeatureCollection","features":[{"type":"Feature","properties":{"score":"","fid":""},"geometry":{"type":"Point","coordinates":[88.388786315918,22.551879205144]}},{"type":"Feature","properties":{"score":"","fid":""},"geometry":{"type":"Polygon","coordinates":["[[88.41796875, 22.568048815726],[88.41796875, 22.572804222704],[88.41796875, 22.577876475976],[88.428955078125, 22.578114233267],[88.428955078125, 22.573121244003],[88.428611755371, 22.568048815726],[88.41796875, 22.568048815726]]"]}}]}

如您所见，坐标带有“ ”。

"[[88.41796875, 22.568048815726],[88.41796875, 22.572804222704],[88.41796875, 22.577876475976],[88.428955078125, 22.578114233267],[88.428955078125, 22.573121244003],[88.428611755371, 22.568048815726],[88.41796875, 22.568048815726]]"

我不想要多坐标的双引号开始和结束。

请指导/建议我如何使用那些双引号。

Answer 1

@Simba - 谢谢你指导我。你的向导帮助我得到准确的结果

$output = json_decode('['.$row['more_info'].']');
$feature = array(
        'type' => 'Feature',
         'properties' => array(
             'score' => "",
             'fid' => ""
        //Other fields here, end without a comma
            ),

      'geometry' => array(
        'type' => $type,
        'coordinates' => array($output)
            )
        );

Answer 2

问题在这里：'coordinates' => array('['.$row['more_info'].']').

我不知道您为什么要在此处添加 '[' 和 ']'，但看起来您正在尝试手动构建 JSON 字符串。如果你这样做，那么是的，当你使用 json_encode() 时你最终会得到不需要的引号，因为 json_encode() 将整个内容视为一个字符串。

不清楚 $row['more_info'] 开头包含什么，但我猜它包含一个已经是 JSON 格式的字符串。如果你想将它添加到你的输出 JSON，那么你需要做的第一件事就是将它转换回 PHP 数组。

您的代码可能如下所示：

'coordinates' => json_decode($row['more_info'], true)

在 PHP 数组中 json 输出到 JSON 之后出现双配额

double quotas appearing after json output in PHP array to JSON

php

arrays

json

double-quotes