From 841156e7113716f676f8384500f483f0e69a77f2 Mon Sep 17 00:00:00 2001
From: Vincent Langlet <vincentlanglet@hotmail.fr>
Date: Sat, 27 Sep 2025 22:18:52 +0200
Subject: [PATCH] Rely on RuleLevelHelper in InvalidKeyInArrayItemRule

---
 .../Arrays/InvalidKeyInArrayItemRule.php      | 41 +++++++++++--------
 .../Arrays/InvalidKeyInArrayItemRuleTest.php  | 34 ++++++++++++++-
 .../Arrays/data/invalid-key-array-item.php    |  7 ++++
 3 files changed, 63 insertions(+), 19 deletions(-)

diff --git a/src/Rules/Arrays/InvalidKeyInArrayItemRule.php b/src/Rules/Arrays/InvalidKeyInArrayItemRule.php
index 993a6dde61..a4c76cfc8a 100644
--- a/src/Rules/Arrays/InvalidKeyInArrayItemRule.php
+++ b/src/Rules/Arrays/InvalidKeyInArrayItemRule.php
@@ -4,11 +4,12 @@
 
 use PhpParser\Node;
 use PHPStan\Analyser\Scope;
-use PHPStan\DependencyInjection\AutowiredParameter;
 use PHPStan\DependencyInjection\RegisteredRule;
 use PHPStan\Rules\Rule;
 use PHPStan\Rules\RuleErrorBuilder;
-use PHPStan\Type\MixedType;
+use PHPStan\Rules\RuleLevelHelper;
+use PHPStan\Type\ErrorType;
+use PHPStan\Type\Type;
 use PHPStan\Type\VerbosityLevel;
 use function sprintf;
 
@@ -20,8 +21,7 @@ final class InvalidKeyInArrayItemRule implements Rule
 {
 
 	public function __construct(
-		#[AutowiredParameter]
-		private bool $reportMaybes,
+		private RuleLevelHelper $ruleLevelHelper,
 	)
 	{
 	}
@@ -37,23 +37,28 @@ public function processNode(Node $node, Scope $scope): array
 			return [];
 		}
 
-		$dimensionType = $scope->getType($node->key);
+		$dimensionType = $this->ruleLevelHelper->findTypeToCheck(
+			$scope,
+			$node->key,
+			'',
+			static fn (Type $dimType): bool => AllowedArrayKeysTypes::getType()->isSuperTypeOf($dimType)->yes(),
+		)->getType();
+		if ($dimensionType instanceof ErrorType) {
+			return [];
+		}
+
 		$isSuperType = AllowedArrayKeysTypes::getType()->isSuperTypeOf($dimensionType);
-		if ($isSuperType->no()) {
-			return [
-				RuleErrorBuilder::message(
-					sprintf('Invalid array key type %s.', $dimensionType->describe(VerbosityLevel::typeOnly())),
-				)->identifier('array.invalidKey')->build(),
-			];
-		} elseif ($this->reportMaybes && $isSuperType->maybe() && !$dimensionType instanceof MixedType) {
-			return [
-				RuleErrorBuilder::message(
-					sprintf('Possibly invalid array key type %s.', $dimensionType->describe(VerbosityLevel::typeOnly())),
-				)->identifier('array.invalidKey')->build(),
-			];
+		if ($isSuperType->yes()) {
+			return [];
 		}
 
-		return [];
+		return [
+			RuleErrorBuilder::message(sprintf(
+				'%s array key type %s.',
+				$isSuperType->no() ? 'Invalid' : 'Possibly invalid',
+				$dimensionType->describe(VerbosityLevel::typeOnly()),
+			))->identifier('array.invalidKey')->build(),
+		];
 	}
 
 }
diff --git a/tests/PHPStan/Rules/Arrays/InvalidKeyInArrayItemRuleTest.php b/tests/PHPStan/Rules/Arrays/InvalidKeyInArrayItemRuleTest.php
index ab486eeacf..17664a61f8 100644
--- a/tests/PHPStan/Rules/Arrays/InvalidKeyInArrayItemRuleTest.php
+++ b/tests/PHPStan/Rules/Arrays/InvalidKeyInArrayItemRuleTest.php
@@ -3,6 +3,7 @@
 namespace PHPStan\Rules\Arrays;
 
 use PHPStan\Rules\Rule;
+use PHPStan\Rules\RuleLevelHelper;
 use PHPStan\Testing\RuleTestCase;
 use PHPUnit\Framework\Attributes\RequiresPhp;
 
@@ -12,9 +13,15 @@
 class InvalidKeyInArrayItemRuleTest extends RuleTestCase
 {
 
+	private bool $checkExplicitMixed = false;
+
+	private bool $checkImplicitMixed = false;
+
 	protected function getRule(): Rule
 	{
-		return new InvalidKeyInArrayItemRule(true);
+		$ruleLevelHelper = new RuleLevelHelper(self::createReflectionProvider(), true, false, true, $this->checkExplicitMixed, $this->checkImplicitMixed, false, true);
+
+		return new InvalidKeyInArrayItemRule($ruleLevelHelper);
 	}
 
 	public function testInvalidKey(): void
@@ -35,6 +42,31 @@ public function testInvalidKey(): void
 		]);
 	}
 
+	public function testInvalidMixedKey(): void
+	{
+		$this->checkExplicitMixed = true;
+		$this->checkImplicitMixed = true;
+
+		$this->analyse([__DIR__ . '/data/invalid-key-array-item.php'], [
+			[
+				'Invalid array key type DateTimeImmutable.',
+				13,
+			],
+			[
+				'Invalid array key type array.',
+				14,
+			],
+			[
+				'Possibly invalid array key type stdClass|string.',
+				15,
+			],
+			[
+				'Possibly invalid array key type mixed.',
+				22,
+			],
+		]);
+	}
+
 	public function testInvalidKeyInList(): void
 	{
 		$this->analyse([__DIR__ . '/data/invalid-key-list.php'], [
diff --git a/tests/PHPStan/Rules/Arrays/data/invalid-key-array-item.php b/tests/PHPStan/Rules/Arrays/data/invalid-key-array-item.php
index cde86133df..0343a0b1ad 100644
--- a/tests/PHPStan/Rules/Arrays/data/invalid-key-array-item.php
+++ b/tests/PHPStan/Rules/Arrays/data/invalid-key-array-item.php
@@ -14,3 +14,10 @@
 	[] => 'bbb',
 	$stringOrObject => 'aaa',
 ];
+
+/** @var mixed $mixed */
+$mixed = doFoo();
+
+$b = [
+	$mixed => 'foo',
+];