From 4209816d69fbc9c9ceb52b593bfaf297683eb74d Mon Sep 17 00:00:00 2001
From: Mo <35631697+modevelops@users.noreply.github.com>
Date: Thu, 29 Dec 2022 15:23:52 +0100
Subject: [PATCH] PHP 8.1 fix for ctype_digit() deprecated error

Fix for PHP 8.1 deprecated error: ctype_digit(): Argument of type int will be interpreted as string in the future in `bshaffer/oauth2-server-php/src/OAuth2/GrantType/JwtBearer.php`

see https://www.php.net/manual/en/function.ctype-digit.php
---
 src/OAuth2/GrantType/JwtBearer.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/OAuth2/GrantType/JwtBearer.php b/src/OAuth2/GrantType/JwtBearer.php
index 62c1efabd..2bcc1a035 100644
--- a/src/OAuth2/GrantType/JwtBearer.php
+++ b/src/OAuth2/GrantType/JwtBearer.php
@@ -127,7 +127,7 @@ public function validateRequest(RequestInterface $request, ResponseInterface $re
         }
 
         // Check expiration
-        if (ctype_digit($jwt['exp'])) {
+        if (ctype_digit((string)$jwt['exp'])) {
             if ($jwt['exp'] <= time()) {
                 $response->setError(400, 'invalid_grant', "JWT has expired");
 
@@ -141,7 +141,7 @@ public function validateRequest(RequestInterface $request, ResponseInterface $re
 
         // Check the not before time
         if ($notBefore = $jwt['nbf']) {
-            if (ctype_digit($notBefore)) {
+            if (ctype_digit((string)$notBefore)) {
                 if ($notBefore > time()) {
                     $response->setError(400, 'invalid_grant', "JWT cannot be used before the Not Before (nbf) time");