Remove the top level array and merge sub array into one - php

Question

I have a multidimensional array and I want to remove the top level array and merge all its sub array into one array.
Below is my array:
$arr = [KEY1] => Array
(
[0] => Array
(
[Feb] => 120
)
[1] => Array
(
[Jan] => 230
)
[3] => Array
(
[Mar] => 340
)
)
[KEY2] => Array
(
[0] => Array
(
[Feb] => 12
)
[1] => Array
(
[Jan] => 23
)
[3] => Array
(
[Mar] => 34
)
)
I need to arrange and sort this array like below:
Output:
[KEY1] => Array
(
[Jan] => 230,
[Feb] => 120,
[Mar] => 340
)
[KEY2] => Array
(
[Jan] => 23,
[Feb] => 12,
[Mar] => 34
)
I have used
call_user_func_array('array_merge', $arr ); but not working.
Please suggest any wise way to do this.
Thanks

Answer 1

You can try like this as simple way,
$arr = [
'key1' =>[
0 => ["feb" => 123],
1 => ["dev" => 213],
2 => ["jan" => 111],
],
'key2' =>[
0 => ["feb" => 132],
1 => ["dev" => 321],
2 => ["jan" => 555],
],
];
$result = [];
foreach($arr as $k => $v){
foreach($v as $k1 => $v1){
foreach($v1 as $k2 => $v2)
$result[$k][$k2] = $v2;
}
}
print_r($result);
Hope this will solve your problem.
EDIT
Here is your sorting function.
function sortNestedArray(&$a)
{
sort($a);
for ($i = 0; $i < count($a); $i++) {
if (is_array($a[$i])) {
sortNestedArray($a[$i]);
}
}
return $a;
}
$a = sortNestedArray($result);
print_r($a);