search inside arrays with condition in php - php

Question

I have an api with a list of arrays inside one array and each array inside this array it has one key [attributes] and inside this key one array with key [CITY_NAME]
this is my array coming from api
this array number is 0 but every day this number is changed and my figures come wrong, what is the good way to always have my city figures using the key [CITY_NAME]
I am fetching the data using this code
$json = file_get_contents($url);
$json_data = json_decode($json, true);
$data = $json_data['features'];
$mycity = $data[0]['attributes'];
Array
(
[0] => Array
(
[attributes] => Array
(
[CITY_NAME] => city1
[Name] => city1
[ADMIN_NAME] => city1
[POP_CLASS] => 5,000,000 to10,000,000
[Population] => 7676654
[Population_Data_Source] => Wikipedia
[Population_Data_Date] => 2018
[CityID] => 14
[Longitude] => 46.7614868685786
[Latitude] => 24.7388786516234
[Confirmed] => 0
[Recovered] => 0
[Deaths] => 0
[Active] => 0
[Tested] => 0
[Name_Eng] => city1
[Join_Count] => 61
[Confirmed_SUM] => 5152
[Deaths_SUM] => 9
[Recovered_SUM] => 1407
[Active_SUM] => 3736
[Tested_SUM] => 376607
[ObjectId] => 14
)
)
[1] => Array
(
[attributes] => Array
(
[CITY_NAME] => city2
[Name] => city2
[ADMIN_NAME] => city2
[POP_CLASS] => 1,000,000 to 5,000,000
[Population] => 1675368
[Population_Data_Source] => Wikipedia
[Population_Data_Date] => 2010
[CityID] => 9
[Longitude] => 39.8148987363852
[Latitude] => 21.4273876500039
[Confirmed] => 0
[Recovered] => 0
[Deaths] => 0
[Active] => 0
[Tested] => 0
[Name_Eng] => city2
[Join_Count] => 59
[Confirmed_SUM] => 6848
[Deaths_SUM] => 85
[Recovered_SUM] => 1145
[Active_SUM] => 5618
[Tested_SUM] => 0
[ObjectId] => 9
)
)

Answer 1

Since I may have misunderstood and you may have many, just build a new array with CITY_NAME:
foreach($data as $values) {
$result[$values['attributes']['CITY_NAME']] = $values['attributes'];
}
Now you can access by CITY_NAME:
echo $result['city1']['Population'];
This might be easier. Extract all attributes from all arrays into an array, then create an array from that indexed by CITY_NAME:
$data = array_column(array_column($json_data['features'], 'attributes'),
null, 'CITY_NAME');