[6.x] Fix infinite value for RedisStore (#31348)

* Fix infinite value for RedisStore

* Let Redis store NAN values

src/Illuminate/Cache/RedisStore.php

@@ -292,7 +292,7 @@ public function setPrefix($prefix)
      */
     protected function serialize($value)
     {
-        return is_numeric($value) ? $value : serialize($value);
+        return is_numeric($value) && ! in_array($value, [INF, -INF]) && ! is_nan($value) ? $value : serialize($value);
     }
 
     /**

tests/Integration/Cache/RedisStoreTest.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace Illuminate\Tests\Integration\Cache;
+
+use Illuminate\Foundation\Testing\Concerns\InteractsWithRedis;
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Tests\Integration\IntegrationTest;
+
+/**
+ * @group integration
+ */
+class RedisStoreTest extends IntegrationTest
+{
+    use InteractsWithRedis;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->setUpRedis();
+    }
+
+    protected function tearDown(): void
+    {
+        parent::tearDown();
+
+        $this->tearDownRedis();
+    }
+
+    public function testItCanStoreInfinite()
+    {
+        Cache::store('redis')->clear();
+
+        $result = Cache::store('redis')->put('foo', INF);
+        $this->assertTrue($result);
+        $this->assertSame(INF, Cache::store('redis')->get('foo'));
+
+        $result = Cache::store('redis')->put('bar', -INF);
+        $this->assertTrue($result);
+        $this->assertSame(-INF, Cache::store('redis')->get('bar'));
+    }
+
+    public function testItCanStoreNan()
+    {
+        Cache::store('redis')->clear();
+
+        $result = Cache::store('redis')->put('foo', NAN);
+        $this->assertTrue($result);
+        $this->assertNan(Cache::store('redis')->get('foo'));
+    }
+}