comparison vendor/symfony/http-foundation/Response.php @ 5:12f9dff5fda9 tip

Update to Drupal core 8.7.1

         if ('HTTP/1.0' != $request->server->get('SERVER_PROTOCOL')) {
             $this->setProtocolVersion('1.1');
         }
 
         // Check if we need to send extra expire info headers
-        if ('1.0' == $this->getProtocolVersion() && false !== strpos($this->headers->get('Cache-Control'), 'no-cache')) {
-            $this->headers->set('pragma', 'no-cache');
-            $this->headers->set('expires', -1);
+        if ('1.0' == $this->getProtocolVersion() && false !== strpos($headers->get('Cache-Control'), 'no-cache')) {
+            $headers->set('pragma', 'no-cache');
+            $headers->set('expires', -1);
         }
 
         $this->ensureIEOverSSLCompatibility($request);
 
         return $this;