Fix Cache::many() with small numeric keys (#48423)

* Update Repository.php

* Update CacheRepositoryTest.php

* Update Repository.php

* Update Repository.php

---------

Co-authored-by: Taylor Otwell <taylor@laravel.com>

Author: AlexKarpan

src/Illuminate/Cache/Repository.php

@@ -163,7 +163,7 @@ protected function handleManyResult($keys, $key, $value)
         if (is_null($value)) {
             $this->event(new CacheMissed($key));
 
-            return isset($keys[$key]) ? value($keys[$key]) : null;
+            return (isset($keys[$key]) && ! array_is_list($keys)) ? value($keys[$key]) : null;
         }
 
         // If we found a valid value we will fire the "hit" event and return the value

tests/Cache/CacheRepositoryTest.php

@@ -58,6 +58,13 @@ public function testGetReturnsMultipleValuesFromCacheWhenGivenAnArrayWithDefault
         $this->assertEquals(['foo' => 'default', 'bar' => 'baz'], $repo->get(['foo' => 'default', 'bar']));
     }
 
+    public function testGetReturnsMultipleValuesFromCacheWhenGivenAnArrayOfOneTwoThree()
+    {
+        $repo = $this->getRepository();
+        $repo->getStore()->shouldReceive('many')->once()->with([1, 2, 3])->andReturn([1 => null, 2 => null, 3 => null]);
+        $this->assertEquals([1 => null, 2 => null, 3 => null], $repo->get([1, 2, 3]));
+    }
+
     public function testDefaultValueIsReturned()
     {
         $repo = $this->getRepository();