From 061393a0980784d0b6e1e3eee9add906bd390f8f Mon Sep 17 00:00:00 2001
From: Christopher Joe <cjoe@silverstripe.com>
Date: Thu, 29 Jun 2017 16:13:38 +1200
Subject: [PATCH] Fix enable ?flush rather than just ?flush=1

---
 src/Control/HTTPApplication.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Control/HTTPApplication.php b/src/Control/HTTPApplication.php
index 7f765feb7..4d0f7cb9d 100644
--- a/src/Control/HTTPApplication.php
+++ b/src/Control/HTTPApplication.php
@@ -41,7 +41,7 @@ class HTTPApplication implements Application
      */
     public function handle(HTTPRequest $request)
     {
-        $flush = $request->getVar('flush') || strpos($request->getURL(), 'dev/build') === 0;
+        $flush = array_key_exists('flush', $request->getVars()) || strpos($request->getURL(), 'dev/build') === 0;
 
         // Ensure boot is invoked
         return $this->execute($request, function (HTTPRequest $request) {