Read Json with features fields - php

Question

I have the following problem.
I am trying to read a Json file but I am not getting the desired result. I have the following data.
I would like to read the features and there is a mistake in finding out somewhere.
I get the error message when reading out:
Warning: Illegal string offset 'features'
Output
Array
(
[objectIdFieldName] => OBJECTID
[uniqueIdField] => Array
(
[name] => OBJECTID
[isSystemMaintained] => 1
)
[globalIdFieldName] =>
[geometryProperties] => Array
(
[shapeAreaFieldName] => Shape__Area
[shapeLengthFieldName] => Shape__Length
[units] => esriMeters
)
[geometryType] => esriGeometryPolygon
[spatialReference] => Array
(
[wkid] => 4326
[latestWkid] => 4326
)
[fields] => Array
(
[0] => Array
(
[name] => GEN
[type] => esriFieldTypeString
[alias] => GEN
[sqlType] => sqlTypeOther
[length] => 33
[domain] =>
[defaultValue] =>
)
[1] => Array
(
[name] => cases
[type] => esriFieldTypeInteger
[alias] => Anzahl Fälle
[sqlType] => sqlTypeOther
[domain] =>
[defaultValue] =>
)
[2] => Array
(
[name] => deaths
[type] => esriFieldTypeInteger
[alias] => Anzahl Todesfälle
[sqlType] => sqlTypeOther
[domain] =>
[defaultValue] =>
)
)
[features] => Array
(
[0] => Array
(
[attributes] => Array
(
[GEN] => Celle
[cases] => 220
[deaths] => 15
)
...........
My Code
$url = "https://services7.arcgis.com/mOBPykOjAyBO2ZKk/arcgis/rest/services/RKI_Landkreisdaten/FeatureServer/0/query?where=GEN%20%3D%20%27CELLE%27&outFields=GEN,cases,deaths&outSR=4326&f=json";
$json = file_get_contents($url);
$data = json_decode($json,true); //decode json result as array and thenloop it
print '<pre>';
print_r($data);
foreach($data as $row){
echo $row['features']->$row['attributes']->$row['GEN'];
}
Where am I wrong in reading?
It only has to be read what is in parentheses right?
So actually features-> attributes-> Gen to get the GEN query

Answer 1

Let's try change to this.
foreach($data as $row){
echo $row['features'][0]['attributes']['GEN'];
}

Answer 2

Sorry this is my fault when seem does'nt read clearly your question.
With GEN attribute you don't use loop to get this value.
If you wanna get GEN only your code should be that.
$url = "https://services7.arcgis.com/mOBPykOjAyBO2ZKk/arcgis/rest/services/RKI_Landkreisdaten/FeatureServer/0/query?where=GEN%20%3D%20%27CELLE%27&outFields=GEN,cases,deaths&outSR=4326&f=json";
$json = file_get_contents($url);
$data = (array) json_decode($json, true); //decode json result as array and thenloop it
print '<pre>';
print_r($data);
echo $data['features']['attributes']['GEN'];
// foreach($data as $row){
// echo $row['features']->$row['attributes']->$row['GEN'];
// }