Merge two arrays without replacing values - php

Question

Im a bit lost or mind is not working as it should. I read other questions around but can get mine to work.
I got this array:
Array
(
[89] => Array
(
[0] => 16
[1] => 2
)
)
And i got this :
Array
(
[84] => Array
(
[0] => 2
)
[83] => Array
(
[0] => 2
)
[87] => Array
(
[0] => 2
[1] => 3
)
[88] => Array
(
[0] => 2
)
[89] => Array
(
[0] => 2
)
[90] => Array
(
[0] => 2
)
)
I should get all results but on key 89 i should get the value from first array.
Array
(
[84] => Array
(
[0] => 2
)
[83] => Array
(
[0] => 2
)
[87] => Array
(
[0] => 2
[1] => 3
)
[88] => Array
(
[0] => 2
)
[89] => Array
(
[0] => 16
[1] => 2
)
[90] => Array
(
[0] => 2
)
)
Array merge wont work :( .
Also after i get the result if the first array its :
Array
(
[89] => Array
(
[1] => 2
)
)
The resulting array should update to one record.
Im sure its a 1 min code for you gurus but arrays always been a pain for me.
Thanks
UPDATE : if i use array_merge_recursive it wont keep my keys :
print_r(array_merge_recursive($array1,$array2));
Array
(
[0] => Array
(
[0] => 16
[1] => 2
)
[1] => Array
(
[0] => 2
)
[2] => Array
(
[0] => 2
)
[3] => Array
(
[0] => 2
[1] => 3
)
[4] => Array
(
[0] => 2
)
[5] => Array
(
[0] => 2
)
[6] => Array
(
[0] => 2
)
)

Answer 1

array_merge_recursive should do the job; look at the documentation for more pointers: http://www.php.net/manual/en/function.array-merge-recursive.php
EDIT
The function behaved differently than I initially thought, here´s a different version of the function to solve your problem:
function array_merge_recursive_distinct(array &$array1, array &$array2) {
$merged = $array1;
foreach($array2 as $key => &$value) {
if(is_array($value) && isset($merged[$key]) && is_array($merged[$key])) {
$merged[$key] = array_merge_recursive_distinct($merged[$key], $value);
} else {
$merged[$key] = $value;
}
}
return $merged;
}
Thanks to the community of php.net http://www.php.net/manual/en/function.array-merge-recursive.php#92195

Answer 2

If I understand it correctly, adding arrays should suffice:
$result_array = $array1 + $array2;
In contrast to array_merge, it won't overwrite values in first array and won't renumber numerical keys.

Answer 3

$newarray=array();
foreach(array_merge($array1,$array2) as $k=>$arr){
$newarray[$k]=array_merge($array1[$k],$array2[$k]);
}

Answer 4

foreach($firstArr as $key=>$val){
if(in_array($key,$secondArray)){
$secondArray[$key] = $firstArr[$key];
}
}
Try this may help you.