From 8058d53f6aba1e803e4c7034ac166e66d49666ed Mon Sep 17 00:00:00 2001
From: Andrew Nicols <andrew@nicols.co.uk>
Date: Thu, 2 Aug 2018 10:57:53 +0800
Subject: [PATCH 1/2] MDL-63050 redis: Make session check compatible with Redis
 4.0

---
 lib/classes/session/redis.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/classes/session/redis.php b/lib/classes/session/redis.php
index fefab50d7d6..a669996e764 100644
--- a/lib/classes/session/redis.php
+++ b/lib/classes/session/redis.php
@@ -396,7 +396,7 @@ class redis extends handler {
         }
 
         try {
-            return $this->connection->exists($sid);
+            return !empty($this->connection->exists($sid));
         } catch (RedisException $e) {
             return false;
         }

From 03587989eaaac09646fefea386009225b0e447bd Mon Sep 17 00:00:00 2001
From: Andrew Nicols <andrew@nicols.co.uk>
Date: Thu, 2 Aug 2018 10:59:53 +0800
Subject: [PATCH 2/2] MDL-63050 cachestore_redis: Update hExists to check empty

---
 cache/stores/redis/lib.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cache/stores/redis/lib.php b/cache/stores/redis/lib.php
index bcf56fddbbf..83a58892e5b 100644
--- a/cache/stores/redis/lib.php
+++ b/cache/stores/redis/lib.php
@@ -325,7 +325,7 @@ class cachestore_redis extends cache_store implements cache_is_key_aware, cache_
      * @return bool True if the key exists, false if it does not.
      */
     public function has($key) {
-        return $this->redis->hExists($this->hash, $key);
+        return !empty($this->redis->hExists($this->hash, $key));
     }
 
     /**