From aaf5fd56b39c23066562eee4a29b12d368c13418 Mon Sep 17 00:00:00 2001
From: Abdul Malik Ikhsan <samsonasik@gmail.com>
Date: Fri, 12 Sep 2025 19:02:55 +0700
Subject: [PATCH 1/2] [TypeDeclarationDocblocks] Use unique type when all types
 equals on AddReturnDocblockForCommonObjectDenominatorRector

---
 .../Fixture/unique_type_single.php.inc        | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 rules-tests/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector/Fixture/unique_type_single.php.inc

diff --git a/rules-tests/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector/Fixture/unique_type_single.php.inc b/rules-tests/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector/Fixture/unique_type_single.php.inc
new file mode 100644
index 00000000000..fd6e97d996a
--- /dev/null
+++ b/rules-tests/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector/Fixture/unique_type_single.php.inc
@@ -0,0 +1,36 @@
+<?php
+
+namespace Rector\Tests\TypeDeclarationDocblocks\Rector\ClassMethod\AddReturnDocblockForCommonObjectDenominatorRector\Fixture;
+
+final class UniqueTypeSingle
+{
+    public function getExtensions(): array
+    {
+        return [
+            new \DateTime('now'),
+            new \DateTime('tomorrow'),
+        ];
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\TypeDeclarationDocblocks\Rector\ClassMethod\AddReturnDocblockForCommonObjectDenominatorRector\Fixture;
+
+final class UniqueTypeSingle
+{
+    /**
+     * @return \DateTime[]
+     */
+    public function getExtensions(): array
+    {
+        return [
+            new \DateTime('now'),
+            new \DateTime('tomorrow'),
+        ];
+    }
+}
+
+?>

From 7b53617ffbe3e0bb1ef349f04f80e8ea06daae99 Mon Sep 17 00:00:00 2001
From: Abdul Malik Ikhsan <samsonasik@gmail.com>
Date: Fri, 12 Sep 2025 19:09:44 +0700
Subject: [PATCH 2/2] Fix

---
 ...cblockForCommonObjectDenominatorRector.php | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/rules/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector.php b/rules/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector.php
index 47073b89061..b699c423dbc 100644
--- a/rules/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector.php
+++ b/rules/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector.php
@@ -147,14 +147,21 @@ public function refactor(Node $node): ?Node
             return null;
         }
 
-        $parentClassesAndInterfaces = [];
+        $uniqueReferencedClasses = array_unique($referencedClasses, SORT_REGULAR);
 
-        foreach ($referencedClasses as $referencedClass) {
-            $parentClassesAndInterfaces[] = $this->resolveParentClassesAndInterfaces($referencedClass);
-        }
+        if (count($uniqueReferencedClasses) === 1) {
+            $firstSharedType = $uniqueReferencedClasses[0];
+        } else {
+
+            $parentClassesAndInterfaces = [];
 
-        $firstSharedTypes = array_intersect(...$parentClassesAndInterfaces);
-        $firstSharedType = $firstSharedTypes[0] ?? null;
+            foreach ($referencedClasses as $referencedClass) {
+                $parentClassesAndInterfaces[] = $this->resolveParentClassesAndInterfaces($referencedClass);
+            }
+
+            $firstSharedTypes = array_intersect(...$parentClassesAndInterfaces);
+            $firstSharedType = $firstSharedTypes[0] ?? null;
+        }
 
         if ($firstSharedType === null) {
             return null;