From 4841e04d858b7f87a0156cac3428fc3c32fb9f2b Mon Sep 17 00:00:00 2001
From: Tim Otten <totten@civicrm.org>
Date: Thu, 29 Mar 2018 18:14:48 -0700
Subject: [PATCH] (dev/core#177) Redis::get() should return NULL for undefined
 cache keys

The docs for  `CRM_Utils_Cache_Interface::get()` specify that the return value should be NULL
if the key does not exist.

However, `CRM_Utils_Cache_Redis::get()` was returning FALSE in that circumstance
(because `unserialize(FALSE)===FALSE`). This fixes it comply.
---
 CRM/Utils/Cache/Redis.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CRM/Utils/Cache/Redis.php b/CRM/Utils/Cache/Redis.php
index 07279d530d..5dddf91d53 100644
--- a/CRM/Utils/Cache/Redis.php
+++ b/CRM/Utils/Cache/Redis.php
@@ -130,7 +130,7 @@ class CRM_Utils_Cache_Redis implements CRM_Utils_Cache_Interface {
    */
   public function get($key) {
     $result = $this->_cache->get($this->_prefix . $key);
-    return unserialize($result);
+    return ($result === FALSE) ? NULL : unserialize($result);
   }
 
   /**
-- 
2.25.1