Combining Arrays while merging the values with the same key - php

Question

I have two arrays with same amount of values. I need to combine them ( array1 value to key, array2 value as value) without losing the values of the second array due to duplicate key. when I use combine_array() as expected it just gets the last value of the second array with the same key.
Array
(
[0] => 1
[1] => 2
[2] => 2
[3] => 3
)
Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
)
Desired result
Array
(
[1] => 1
[2] => Array(
[0]=>2
[1]=>3
)
[3] => 2
)

Answer 1

This code will meet your request
$array1 = array("0"=>1,"1"=>2,"2"=>2,"3"=>3);
$array2 = array("0"=>1,"1"=>2,"2"=>3,"3"=>4);
$array = array();
foreach($array1 as $key => $value){
if($value != $array2[$key]){
$array[$key][] = $value;
$array[$key][] = $array2[$key];
}else{
$array[$key] = $value;
}
}
print_r($array);
The desired result is
Array
(
[0] => 1
[1] => 2
[2] => Array
(
[0] => 2
[1] => 3
)
[3] => Array
(
[0] => 3
[1] => 4
)
)

Answer 2

I'm sure there are way better solutions than this, but it does the job for now. I would appreciate if someone can send a better written solution.
$combined = array();
$tempAr = array();
$firstMatch = array();
$count = 0;
foreach ($array1 as $index => $key) {
if (array_key_exists($key, $combined)) {
$tempAr[] = $array2[$index];
$count++;
} else {
$totalCount = $count;
}
if (!array_key_exists($key, $firstMatch)) {
$firstMatch[$key] = $array2[$index];
}
$output = array_slice($tempAr, $totalCount);
$combined[$key] = $output;
}
$combined = array_merge_recursive($firstMatch, $combined);