i need help for empty array in array_column - php

Question

I tried in many ways, but none is my specific problem, I tried to use what I know, but to no avail. I'm trying to use file_get_contents to get the json from 1 file.json on my server, and calculate a specific array, but after the "array_column" it returns an empty array.
<?php
$json_url = "http://myserver/file.json";
$json = file_get_contents($json_url);
$data = json_decode($json, true);
$price = array_column($data, 'valor');
print_r($price);
//output = array() | empyty array
the $json return the correct json,
in the $data return the corret decoded json,
but in $price, return empty array()
the $json content of my json file in my server is similar to it:
{
"1228421731": [
{
"valor": 10,
"datelimite": 1644024834,
"date": 1643420034,
"codigo": "ALYCGKU76S"
}
],
"1111925985": [
{
"valor": 25,
"datelimite": 1644066350,
"date": 1643461550,
"codigo": "HK8NQROGBW"
}
],
"1413051871": [
{
"valor": 50,
"datelimite": 1644084293,
"date": 1643479493,
"codigo": "4NGJ523J6H"
}
],
"1209626299": [
{
"valor": 10,
"datelimite": 1644091732,
"date": 1643486932,
"codigo": "W7LRGY3FHZ"
}
],
"1803561706": [
{
"valor": 10,
"datelimite": 1644257719,
"date": 1643652919,
"codigo": "GE8IDPZN9H"
},
{
"valor": 19865091226,
"datelimite": 1644288984,
"date": 1643684184,
"codigo": "F5Q9TPE43SWAFX"
}
],
"1710879952": [
{
"valor": 19865091226,
"datelimite": 1644274668,
"date": 1643669868,
"codigo": "P5M4E6RP1ZPEUR"
}
],
"1907375762": [
{
"valor": 10,
"datelimite": 1644377257,
"date": 1643772457,
"codigo": "E8OKPVCYVWRHUI"
}
],
"1863764959": [
{
"valor": 25,
"datelimite": 1644427955,
"date": 1643823155,
"codigo": "L78EZKJZJ93UYW"
}
],
"1831713303": [
{
"valor": 10,
"datelimite": 1644442109,
"date": 1643837309,
"codigo": "3J84VTS5FRS6OI"
}
],
"5193759120": [
{
"valor": 10,
"datelimite": 1644453308,
"date": 1643848508,
"codigo": "88942HFHZ5JJ56"
}
],
"1785872541": [
{
"valor": 10,
"datelimite": 1644504518,
"date": 1643899718,
"codigo": "LBML4O31RLC7DW"
}
],
"1666986497": [
{
"valor": 1,
"datelimite": 1644667829,
"date": 1644063029,
"codigo": "HXHPK6XLNBD89E"
}
]
}
how can i use array_column for this json type? for the array 'valor'?

Answer 1

$data is in this format
Array
(
[1228421731] => Array
(
[0] => Array
(
[valor] => 10
[datelimite] => 1644024834
[date] => 1643420034
[codigo] => ALYCGKU76S
)
)
[1111925985] => Array
(
[0] => Array
(
[valor] => 25
[datelimite] => 1644066350
[date] => 1643461550
[codigo] => HK8NQROGBW
)
)
[1413051871] => Array
(
[0] => Array
(
[valor] => 50
[datelimite] => 1644084293
[date] => 1643479493
[codigo] => 4NGJ523J6H
)
)
[1209626299] => Array
(
[0] => Array
(
[valor] => 10
[datelimite] => 1644091732
[date] => 1643486932
[codigo] => W7LRGY3FHZ
)
)
[1803561706] => Array
(
[0] => Array
(
[valor] => 10
[datelimite] => 1644257719
[date] => 1643652919
[codigo] => GE8IDPZN9H
)
[1] => Array
(
[valor] => 19865091226
[datelimite] => 1644288984
[date] => 1643684184
[codigo] => F5Q9TPE43SWAFX
)
)
[1710879952] => Array
(
[0] => Array
(
[valor] => 19865091226
[datelimite] => 1644274668
[date] => 1643669868
[codigo] => P5M4E6RP1ZPEUR
)
)
[1907375762] => Array
(
[0] => Array
(
[valor] => 10
[datelimite] => 1644377257
[date] => 1643772457
[codigo] => E8OKPVCYVWRHUI
)
)
[1863764959] => Array
(
[0] => Array
(
[valor] => 25
[datelimite] => 1644427955
[date] => 1643823155
[codigo] => L78EZKJZJ93UYW
)
)
[1831713303] => Array
(
[0] => Array
(
[valor] => 10
[datelimite] => 1644442109
[date] => 1643837309
[codigo] => 3J84VTS5FRS6OI
)
)
[5193759120] => Array
(
[0] => Array
(
[valor] => 10
[datelimite] => 1644453308
[date] => 1643848508
[codigo] => 88942HFHZ5JJ56
)
)
[1785872541] => Array
(
[0] => Array
(
[valor] => 10
[datelimite] => 1644504518
[date] => 1643899718
[codigo] => LBML4O31RLC7DW
)
)
[1666986497] => Array
(
[0] => Array
(
[valor] => 1
[datelimite] => 1644667829
[date] => 1644063029
[codigo] => HXHPK6XLNBD89E
)
)
)
so I think you can try to get the first array element in each array and then operate on those arrays, like this
$price = array_column(array_column($data, 0),'valor');
This will give the results

Answer 2

You can try this
array_column(array_merge(...(json_decode($json,true))),"valor")
This will return an array with all the values of valor

Answer 3

If you want an array of all valor values:
$flatArray = array_reduce(
json_decode($json, true),
fn($carry, $item) => $carry = array_merge($carry, array_column($item, 'valor')),
[]
);
If you want an array grouped by valors belonging together:
$groupedArray = array_reduce(
json_decode($json, true),
fn($carry, $item) => $carry = array_merge($carry, [ array_column($item, 'valor') ]),
[])
;