PHP merge array by "depth"? [duplicate] - php

Question

This question already has answers here:
How to array_merge_recursive() an array?
(2 answers)
Closed 3 months ago.
I have an array like this:
[
{
"function_1": {
"element": {
"error": "0",
"msg": "test"
}
}
},
{
"function_1": {
"element_2": {
"error": "0",
"msg": "test"
}
}
},
{
"function_2": {
"element": {
"error": "0",
"msg": "test"
}
}
},
{
"function_2": {
"element_2": {
"error": "0",
"msg": "test"
}
}
}
]
I want output like this:
[
{
"function_1": {
"element": {
"error": "0",
"msg": "test"
},
"element_2": {
"error": "0",
"msg": "test"
}
}
},
{
"function_2": {
"element": {
"error": "0",
"msg": "test"
},
"element_2": {
"error": "0",
"msg": "test"
}
}
}
]
The answers that I found offered to search by name("function_1", "function_2"). But this does not suit me, the function will not always pass an array. I need exactly the "depth" or any other reasonable way.
Thank you!

Answer 1

To achieve your desired result, you could json-decode, recursively merge each individual subarray, then loop over that structure to push each item as a second-level array like this: (Demo)
$array = json_decode($json, true);
$merged = array_merge_recursive(...$array);
$result = [];
foreach ($merged as $key => $data) {
$result[] = [$key => $data];
}
var_export($result);
But I can't imagine getting any benefit from adding unnecessary depth to your result array. I recommend simply json decoding, then calling array_merge_recursive() with the spread operator: (Demo)
var_export(
array_merge_recursive(
...json_decode($json, true)
)
);
Output:
array (
'function_1' =>
array (
'element' =>
array (
'error' => '0',
'msg' => 'test',
),
'element_2' =>
array (
'error' => '0',
'msg' => 'test',
),
),
'function_2' =>
array (
'element' =>
array (
'error' => '0',
'msg' => 'test',
),
'element_2' =>
array (
'error' => '0',
'msg' => 'test',
),
),
)

Answer 2

Your data structure looks weird for the purpose you are trying to achieve I'm bored af tho and created this code for you
function combineElementsPerfunction($functions) {
$result = [];
$uniqueFunctions = [];
foreach ($functions as $function) {
$functionName = array_keys($function)[0];
$uniqueFunctions[] = $functionName;
}
$uniqueFunctions = array_unique($uniqueFunctions);
foreach ($uniqueFunctions as $uniqueFunction) {
$functionObjects = array_filter(
$functions,
function($function) use ($uniqueFunction) {
$functionName = array_keys($function)[0];
return $functionName === $uniqueFunction;
}
);
$elements = [];
foreach ($functionObjects as $functionObject) {
$function = array_shift($functionObject);
$elements = array_merge($elements, $function);
}
$result[] = [
$uniqueFunction => $elements
];
}
return $result;
}

Answer 3

function changeArr($data){
$box = $new = [];
foreach ($data as $v){
$key = array_key_first($v);
$i = count($box);
if(in_array($key, $box)){
$keys = array_flip($box);
$i = $keys[$key];
}else{
$box[] = $key;
}
$new[$i][$key] = isset($new[$i][$key]) ? array_merge($new[$i][$key], $v[$key]) : $v[$key];
}
return $new;
}