PHP 8.2 - behave as if checkDynamicProperties was set to true

src/Php/PhpVersion.php

@@ -191,4 +191,9 @@ public function producesWarningForFinalPrivateMethods(): bool
 		return $this->versionId >= 80000;
 	}
 
+	public function deprecatesDynamicProperties(): bool
+	{
+		return $this->versionId >= 80200;
+	}
+
 }

src/Rules/IssetCheck.php

@@ -205,7 +205,11 @@ public function check(Expr $expr, Scope $scope, string $operatorDescription, cal
 				return null;
 			}
 
-			return RuleErrorBuilder::message(sprintf('Using nullsafe property access "?->%s" %s is unnecessary. Use -> instead.', $expr->name->name ?? '(Expression)', $operatorDescription))->build();
+			if ($expr->name instanceof Node\Identifier) {
+				return RuleErrorBuilder::message(sprintf('Using nullsafe property access "?->%s" %s is unnecessary. Use -> instead.', $expr->name->name, $operatorDescription))->build();
+			}
+
+			return RuleErrorBuilder::message(sprintf('Using nullsafe property access "?->(Expression)" %s is unnecessary. Use -> instead.', $operatorDescription))->build();
 		}
 
 		return null;

src/Rules/Properties/AccessPropertiesRule.php

@@ -8,6 +8,7 @@
 use PHPStan\Analyser\NullsafeOperatorHelper;
 use PHPStan\Analyser\Scope;
 use PHPStan\Internal\SprintfHelper;
+use PHPStan\Php\PhpVersion;
 use PHPStan\Reflection\ReflectionProvider;
 use PHPStan\Rules\Rule;
 use PHPStan\Rules\RuleError;
@@ -32,6 +33,7 @@ class AccessPropertiesRule implements Rule
 	public function __construct(
 		private ReflectionProvider $reflectionProvider,
 		private RuleLevelHelper $ruleLevelHelper,
+		private PhpVersion $phpVersion,
 		private bool $reportMagicProperties,
 		private bool $checkDynamicProperties,
 	)
@@ -165,7 +167,15 @@ private function processSingleProperty(Scope $scope, PropertyFetch $node, string
 
 	private function canAccessUndefinedProperties(Scope $scope, Node\Expr $node): bool
 	{
-		return $scope->isUndefinedExpressionAllowed($node) && !$this->checkDynamicProperties;
+		if (!$scope->isUndefinedExpressionAllowed($node)) {
+			return false;
+		}
+
+		if ($this->checkDynamicProperties) {
+			return false;
+		}
+
+		return !$this->phpVersion->deprecatesDynamicProperties();
 	}
 
 }

tests/PHPStan/Rules/Properties/AccessPropertiesInAssignRuleTest.php

@@ -2,6 +2,7 @@
 
 namespace PHPStan\Rules\Properties;
 
+use PHPStan\Php\PhpVersion;
 use PHPStan\Rules\Rule;
 use PHPStan\Rules\RuleLevelHelper;
 use PHPStan\Testing\RuleTestCase;
@@ -17,7 +18,7 @@ protected function getRule(): Rule
 	{
 		$reflectionProvider = $this->createReflectionProvider();
 		return new AccessPropertiesInAssignRule(
-			new AccessPropertiesRule($reflectionProvider, new RuleLevelHelper($reflectionProvider, true, false, true, false), true, true),
+			new AccessPropertiesRule($reflectionProvider, new RuleLevelHelper($reflectionProvider, true, false, true, false), new PhpVersion(PHP_VERSION_ID), true, true),
 		);
 	}