From 04807a1e2ae155b9d3c9b14b3aa2d4ff79cdfe59 Mon Sep 17 00:00:00 2001
From: Andrew Millington <andrew@noexceptions.io>
Date: Sun, 12 Aug 2018 20:29:39 +0100
Subject: [PATCH] Fix incorrect variable reference

---
 src/Grant/AuthCodeGrant.php | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/Grant/AuthCodeGrant.php b/src/Grant/AuthCodeGrant.php
index e969df8e..6e38bc09 100644
--- a/src/Grant/AuthCodeGrant.php
+++ b/src/Grant/AuthCodeGrant.php
@@ -49,6 +49,14 @@ class AuthCodeGrant extends AbstractAuthorizeGrant
         $this->refreshTokenTTL = new \DateInterval('P1M');
     }
 
+    /**
+     * Disable the requirement for a code challenge for public clients.
+     */
+    public function disableCodeChallengeForPublicClients()
+    {
+        $this->requireCodeChallengeForPublicClients = false;
+    }
+
     /**
      * Respond to an access token request.
      *
@@ -185,7 +193,7 @@ class AuthCodeGrant extends AbstractAuthorizeGrant
                     );
                 // @codeCoverageIgnoreEnd
             }
-        } else if ($this->$requireCodeChallengeForPublicClients && !$client->isConfidential()) {
+        } else if ($this->requireCodeChallengeForPublicClients && !$client->isConfidential()) {
             throw OAuthServerException::invalidRequest('code_challenge', 'Code challenge must be provided for public clients');
         }