keep non-simple array types for typed properties

packages/NodeTypeResolver/src/StaticTypeMapper.php

@@ -554,6 +554,13 @@ final class StaticTypeMapper
         throw new NotImplementedException(sprintf('%s for "%s"', __METHOD__, $type));
     }
 
+    public function mapPHPStanPhpDocTypeNodeToPhpDocString(TypeNode $typeNode, Node $node): string
+    {
+        $phpStanType = $this->mapPHPStanPhpDocTypeNodeToPHPStanType($typeNode, $node);
+
+        return $this->mapPHPStanTypeToDocString($phpStanType);
+    }
+
     public function mapPHPStanPhpDocTypeNodeToPHPStanType(TypeNode $typeNode, Node $node): Type
     {
         if ($typeNode instanceof IdentifierTypeNode) {

packages/Php74/src/Rector/Property/TypedPropertyRector.php

@@ -7,6 +7,9 @@ namespace Rector\Php74\Rector\Property;
 use PhpParser\Node;
 use PhpParser\Node\Stmt\Property;
 use PHPStan\PhpDocParser\Ast\PhpDoc\VarTagValueNode;
+use PHPStan\PhpDocParser\Ast\Type\ArrayTypeNode;
+use PHPStan\PhpDocParser\Ast\Type\GenericTypeNode;
+use PHPStan\PhpDocParser\Ast\Type\IdentifierTypeNode;
 use PHPStan\Type\MixedType;
 use Rector\Rector\AbstractRector;
 use Rector\RectorDefinition\CodeSample;
@@ -126,7 +129,44 @@ PHP
             return;
         }
 
+        // keep string[] etc.
+        if ($this->isNonBasicArrayType($property, $varTagValueNode)) {
+            return;
+        }
+
         $propertyPhpDocInfo->removeByType(VarTagValueNode::class);
         $this->docBlockManipulator->updateNodeWithPhpDocInfo($property, $propertyPhpDocInfo);
     }
+
+    private function isNonBasicArrayType(Property $property, VarTagValueNode $varTagValueNode): bool
+    {
+        if (! $this->isArrayGenericTypeNode($varTagValueNode) && ! $this->isArrayTypeNode($varTagValueNode)) {
+            return false;
+        }
+
+        $varTypeDocString = $this->staticTypeMapper->mapPHPStanPhpDocTypeNodeToPhpDocString(
+            $varTagValueNode->type,
+            $property
+        );
+
+        return $varTypeDocString !== 'array';
+    }
+
+    private function isArrayGenericTypeNode(VarTagValueNode $varTagValueNode): bool
+    {
+        if (! $varTagValueNode->type instanceof GenericTypeNode) {
+            return false;
+        }
+
+        if (! $varTagValueNode->type->type instanceof IdentifierTypeNode) {
+            return false;
+        }
+
+        return $varTagValueNode->type->type->name === 'array';
+    }
+
+    private function isArrayTypeNode(VarTagValueNode $varTagValueNode): bool
+    {
+        return $varTagValueNode->type instanceof ArrayTypeNode;
+    }
 }

packages/Php74/tests/Rector/Property/TypedPropertyRector/Fixture/complex_array.php.inc

@@ -0,0 +1,41 @@
+<?php
+
+namespace Rector\Php74\Tests\Rector\Property\TypedPropertyRector\Fixture;
+
+use Rector\Php74\Tests\Rector\Property\TypedPropertyRector\Source\SomeParent;
+
+final class ComplexArray
+{
+    /**
+     * @var array<int, string>
+     */
+    private $foo;
+
+    /**
+     * @var int[]
+     */
+    private $foos;
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Php74\Tests\Rector\Property\TypedPropertyRector\Fixture;
+
+use Rector\Php74\Tests\Rector\Property\TypedPropertyRector\Source\SomeParent;
+
+final class ComplexArray
+{
+    /**
+     * @var array<int, string>
+     */
+    private array $foo;
+
+    /**
+     * @var int[]
+     */
+    private array $foos;
+}
+
+?>

packages/Php74/tests/Rector/Property/TypedPropertyRector/Fixture/simple_array.php.inc

@@ -0,0 +1,24 @@
+<?php
+
+namespace Rector\Php74\Tests\Rector\Property\TypedPropertyRector\Fixture;
+
+final class SimpleArray
+{
+    /**
+     * @var array
+     */
+    private $foo;
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Php74\Tests\Rector\Property\TypedPropertyRector\Fixture;
+
+final class SimpleArray
+{
+    private array $foo;
+}
+
+?>