PHP/Laravel Array diff on nested arrays - remove false values - php

Question

I have two arrays that contain nested arrays also, where I want to compare them against each other. If the value in the first array is false, I want that key removed from the 2nd array.
1st array: $arrayOne:
'entities' => [
'number' => false,
'items' => [
[
'name' => false,
],
],
'totals' => [
'gross' => true,
'tax' => [
'amount' => true,
],
]
];
Then, I have the second array $arrayTwo:
'entities' => [
'number' => '8000000',
'items' => [
[
'name' => 'Bolt cutter',
],
[
'name' => 'Wire cutter',
],
],
'totals' => [
'gross' => 120.52,
'tax' => [
'amount' => 90.21,
],
]
];
As you can see in the first array, the keys: number and items.name is false. These two keys should not be in the final array, thus making it look like this:
'entities' => [
'items' => [],
'totals' => [
'gross' => 120.52,
'tax' => [],
]
];
How can I accomplish this with nested arrays? I have managed to do it for the "1st level" of the array using below:
foreach ($arrayOne as $key => $entity) {
if ($entity === false) {
unset($arrayTwo[$key]);
}
}
However, as said, this only handles the first level of the array and not the nested array(s).

Answer 1

i did test this, and it will work fine.
use Illuminate\Support\Arr;
$flattened_array1 = Arr::dot($array1);
$flattened_array2 = Arr::dot($array2);
foreach ($flattened_array1 as $key => $entity) {
if ($entity === false) {
// remove all number key from first array
$filteredKey = preg_replace('/[0-9]+\./', '', $key);
foreach ($flattened_array2 as $key2 => $value2) {
if(preg_replace('/[0-9]+\./', '', $key2) == $filteredKey){
// comparing to removed number key version of second array
unset($flattened_array2[$key2]);
}
}
}
}
// undot the array
$final_array = [];
foreach ($flattened_array2 as $key => $value) {
array_set($final_array , $key, $value);
}
new Update to support empty array when nested array
use Illuminate\Http\Request;
use Illuminate\Support\Arr;
use Illuminate\Support\Str;
$flattened_array1 = Arr::dot($array1);
$flattened_array2 = Arr::dot($array2);
// Function to check string starting
foreach ($flattened_array1 as $key => $entity) {
if ($entity === false) {
// remove all number key from first array
$removerCounter[$key] = 0;
$filteredKey = preg_replace('/[0-9]+\./', '', $key);
foreach ($flattened_array2 as $key2 => $value2) {
// comparing to removed number key version of second array
if(preg_replace('/[0-9]+\./', '', $key2) == $filteredKey){
// check if it contain filtered number key then
if(preg_replace('/[0-9]+\./', '', $key2) != $key2){
$currentKey = $key2;
preg_match_all("/[0-9]+\./", $currentKey, $hits);
if(!isset($hits[0]) || empty($hits[0]) ){
break;
}
$needle = $hits[0] [ count($hits[0]) - 1 ];
// it is inside key not at the begining
if(stripos($currentKey, $needle) != 0){
// if parent key has no child so let it be empty array
$parentKey = trim(substr($currentKey, 0, stripos($currentKey, $needle)), '.');
// search inside secound array for parentKey of this nested array
$searchAndFound = false;
foreach ($flattened_array2 as $inner_key2 => $inner_value2) {
if( !($searchAndFound) && $inner_key2 != $key2 && Str::startsWith($inner_key2, $parentKey) ) {
$searchAndFound = true;
}
}
if( $searchAndFound ){
// die("e");
unset($flattened_array2[$key2]);
$removerCounter[$key]++;
//remove this key and go for next key in secound array
continue;
}
if($removerCounter[$key] > 0){
unset($flattened_array2[$key2]);
}
$flattened_array2[$parentKey] = [];
}
}
else{
unset($flattened_array2[$key2]);
}
}
}
}
}
// undot the array
$final_array = [];
foreach ($flattened_array2 as $key => $value) {
array_set($final_array , $key, $value);
}
it is more complated that it expected to be . but does the trick :s.