From 9d6001b8280bdfc7c191e1ac3d2b2a5ee7413c2c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?K=C3=A9vin=20Dunglas?= <dunglas@gmail.com>
Date: Tue, 12 Dec 2017 10:01:02 +0100
Subject: [PATCH] Fix bug

---
 src/Illuminate/Http/Middleware/Cache.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Illuminate/Http/Middleware/Cache.php b/src/Illuminate/Http/Middleware/Cache.php
index 9af851365656..2910cdca5bbd 100644
--- a/src/Illuminate/Http/Middleware/Cache.php
+++ b/src/Illuminate/Http/Middleware/Cache.php
@@ -35,7 +35,7 @@ public function handle($request, Closure $next, $options = [])
             $options = $parsedOptions;
         }
 
-        if (true === ($options['etag'] ?? false)) {
+        if (isset($options['etag']) && true === $options['etag']) {
             $options['etag'] = md5($response->getContent());
         }