get array value when comparing it - php

Question

I have 2 arrays fruit
Array(
[0]=>'Apple',
[1]=>'orange',
[2]=>'guava'
)
and second array is Allfruits
Array(
[0]=>'Strawberry',
[1]=>'Manggo',
[2]=>'durian',
[3]=>'Apple',
[4]=>'guava')
And then an empty array call $data
My question is how to insert members of Allfruits when it not exists in fruit array?
So with this example, i want the result is all fruit except Apple and guava inside data array any sugestion?

Answer 1

Here is a simple way of doing that
$items_to_add = array_diff($array_fruit, $array_all_fruit);
$exclude_existing = array_diff($array_all_fruit, $array_fruit);
$new_array = array_merge($items_to_add, $exclude_existing);

Answer 2

By using below function, you can merge 2arrays without duplicate
function mergeArrayIfNotExist($childArray, $parentArray) {
for ($i = 0; $i < sizeof($childArray), $i++) {
if (!in_array($childArray[$i], $parentArray)) {
array_push($parentArray, $childArray[$i]);
}
}
return $parentArray;
}

Answer 3

Just run a loop and search the value in the $data array. If it is in the array then get it's index by using array_search function and unset the value, otherwise add the value in $data array. Finally re-index the array if you need.
$check = ['Apple','orange','guava'];
$data = ['Strawberry','Manggo','durian','Apple','guava'];
foreach ($check as $key => $value) {
if(( $index = array_search( $value, $data )) !== false ){
unset( $data[$index] );
}else{
$data[] = $value;
}
}
$data = array_values( $data ); //for re-indexing the array