From cc19412bca4fc21c39446943bbaf70eb7fe81dda Mon Sep 17 00:00:00 2001
From: Vadim Dvorovenko <vadimon@mail.ru>
Date: Sat, 22 Nov 2025 15:14:41 +0700
Subject: [PATCH 1/2] [12.x] MemoizedStoreTest with empty prefix

---
 tests/Integration/Cache/MemoizedStoreTest.php | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/tests/Integration/Cache/MemoizedStoreTest.php b/tests/Integration/Cache/MemoizedStoreTest.php
index 74022ea8527d..1adc87283573 100644
--- a/tests/Integration/Cache/MemoizedStoreTest.php
+++ b/tests/Integration/Cache/MemoizedStoreTest.php
@@ -121,6 +121,21 @@ public function test_it_uses_correct_keys_for_getMultiple()
         $this->assertSame($cacheValue, $memoValue);
     }
 
+    public function test_it_uses_correct_keys_for_getMultiple_with_empty_prefix()
+    {
+        Cache::setPrefix(null);
+
+        $data = [
+            '1' => 'one',
+            0 => 'zero',
+        ];
+        Cache::putMany($data);
+
+        $this->assertSame($data, Cache::memo()->many(array_keys($data)));
+        // ensure correct on the second memoized retrieval
+        $this->assertSame($data, Cache::memo()->many(array_keys($data)));
+    }
+
     public function test_null_values_are_memoized_when_retrieving_multiple_values()
     {
         $live = Cache::getMultiple(['name.0', 'name.1']);

From 9264a02b6dab6f676665309a3d55e563bb0bdc2f Mon Sep 17 00:00:00 2001
From: Vadim Dvorovenko <vadimon@mail.ru>
Date: Sat, 22 Nov 2025 15:38:04 +0700
Subject: [PATCH 2/2] [12.x] MemoizedStore fix with empty prefix and numeric
 keys

---
 src/Illuminate/Cache/MemoizedStore.php | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/Illuminate/Cache/MemoizedStore.php b/src/Illuminate/Cache/MemoizedStore.php
index 6c24e33346ce..e864e1ec2c86 100644
--- a/src/Illuminate/Cache/MemoizedStore.php
+++ b/src/Illuminate/Cache/MemoizedStore.php
@@ -68,12 +68,9 @@ public function many(array $keys)
 
         if (count($missing) > 0) {
             $retrieved = tap($this->repository->many($missing), function ($values) {
-                $this->cache = [
-                    ...$this->cache,
-                    ...collect($values)->mapWithKeys(fn ($value, $key) => [
-                        $this->prefix($key) => $value,
-                    ]),
-                ];
+                foreach ($values as $key => $value) {
+                    $this->cache[$this->prefix($key)] = $value;
+                }
             });
         }