From 65247ccdc6e126ab602895cbd8088b2c90d6671a Mon Sep 17 00:00:00 2001
From: Ian den Hartog <iandenhartog@hotmail.com>
Date: Tue, 7 Mar 2023 20:15:53 +0100
Subject: [PATCH] Fix use of deprecated string interpolation

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

diff --git a/src/OpenID/AbstractProvider.php b/src/OpenID/AbstractProvider.php
index 0eef9032..10a7fd40 100644
--- a/src/OpenID/AbstractProvider.php
+++ b/src/OpenID/AbstractProvider.php
@@ -100,7 +100,7 @@ protected function getRequiredRequestParameter(array $requestParameters, string
             return $requestParameters[$key];
         }
 
-        throw new Unauthorized("There is no required parameter called: '${key}'");
+        throw new Unauthorized("There is no required parameter called: '{$key}'");
     }
 
     /**