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feat: Add array helper intersectKeyRecursive 
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‎system/Helpers/Array/ArrayHelper.php‎

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@@ -315,4 +315,27 @@ public static function sortValuesByNatural(array &$array, $sortByIndex = null):
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return strnatcmp((string) $currentValue, (string) $nextValue);
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});
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}
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/**
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* Returns a new array from $target with the keys that are in $original
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*
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* @param array<string, array<string,mixed>|string|null> $target
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* @param array<string, array<string,mixed>|string|null> $original
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*
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* @return array<string, array<string,mixed>|string|null>
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*/
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public static function intersectKeyRecursive(array $target, array $original): array
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{
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$result = [];
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foreach ($target as $key => $value) {
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if (is_array($value) && isset($original[$key]) && is_array($original[$key])) {
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$result[$key] = self::intersectKeyRecursive($value, $original[$key]);
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} elseif (array_key_exists($key, $original)) {
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$result[$key] = $value;
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}
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}
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return $result;
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}
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}

‎tests/system/Helpers/Array/ArrayHelperIntersectKeyRecursiveTest.php‎

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<?php
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declare(strict_types=1);
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/**
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* This file is part of CodeIgniter 4 framework.
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*
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* (c) CodeIgniter Foundation <[email protected]>
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*
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* For the full copyright and license information, please view
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* the LICENSE file that was distributed with this source code.
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*/
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namespace CodeIgniter\Helpers\Array;
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use CodeIgniter\Test\CIUnitTestCase;
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use PHPUnit\Framework\Attributes\Group;
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/**
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* @internal
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*/
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#[Group('Others')]
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final class ArrayHelperIntersectKeyRecursiveTest extends CIUnitTestCase
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{
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/**
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* @var array<string, array<string,mixed>|string|null>
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*/
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private array $targetArray;
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protected function setUp(): void
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{
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parent::setUp();
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$this->targetArray = [
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'a' => [
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'b' => [
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'c' => [
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'd' => 'value1',
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],
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],
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'e' => 'value2',
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'f' => [
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'g' => 'value3',
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'h' => 'value4',
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'i' => [
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'j' => 'value5',
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],
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],
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'k' => null,
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'l' => [],
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'm' => '',
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],
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];
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}
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public function testShuffleCopy(): void
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{
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$original = [
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'a' => [
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'l' => [],
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'k' => null,
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'e' => 'value2',
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'f' => [
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'i' => [
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'j' => 'value5',
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],
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'h' => 'value4',
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'g' => 'value3',
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],
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'm' => '',
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'b' => [
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'c' => [
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'd' => 'value1',
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],
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],
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],
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];
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// var_dump(ArrayHelper::intersectKeyRecursive($original, $this->targetArray));
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$this->assertSame($original, ArrayHelper::intersectKeyRecursive($original, $this->targetArray));
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}
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public function testCopyWithAnotherValues(): void
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{
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$original = [
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'a' => [
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'b' => [
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'c' => [
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'd' => 'value1_1',
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],
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],
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'e' => 'value2_2',
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'f' => [
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'g' => 'value3_3',
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'h' => 'value4_4',
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'i' => [
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'j' => 'value5_5',
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],
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],
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'k' => [],
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'l' => null,
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'm' => 'value6_6',
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],
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];
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$this->assertSame($original, ArrayHelper::intersectKeyRecursive($original, $this->targetArray));
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}
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public function testEmptyCompare(): void
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{
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$this->assertSame([], ArrayHelper::intersectKeyRecursive($this->targetArray, []));
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}
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public function testEmptyOriginal(): void
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{
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$this->assertSame([], ArrayHelper::intersectKeyRecursive([], $this->targetArray));
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}
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public function testCompletelyDifferent(): void
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{
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$original = [
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'new_a' => [
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'new_b' => [
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'new_c' => [
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'new_d' => 'value1_1',
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],
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],
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'new_e' => 'value2_2',
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'new_f' => [
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'new_g' => 'value3_3',
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'new_h' => 'value4_4',
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'new_i' => [
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'new_j' => 'value5_5',
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],
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],
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'new_k' => [],
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'new_l' => null,
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'new_m' => '',
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],
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];
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$this->assertSame([], ArrayHelper::intersectKeyRecursive($original, $this->targetArray));
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}
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public function testRecursiveDiffPartlyDifferent(): void
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{
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$original = [
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'a' => [
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'b' => [
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'new_c' => [
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'd' => 'value1',
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],
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],
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'e' => 'value2',
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'f' => [
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'g' => 'value3',
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'new_h' => 'value4',
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'i' => [
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'new_j' => 'value5',
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],
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],
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'k' => null,
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'new_l' => [],
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'm' => [
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'new_n' => '',
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],
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],
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];
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$intersect = [
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'a' => [
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'b' => [],
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'e' => 'value2',
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'f' => [
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'g' => 'value3',
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'i' => [],
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],
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'k' => null,
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'm' => [
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'new_n' => '',
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],
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],
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];
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$this->assertSame($intersect, ArrayHelper::intersectKeyRecursive($original, $this->targetArray));
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}
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}

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