From 0096cce02d2f4a627a85c618b8010b01add6a681 Mon Sep 17 00:00:00 2001
From: Roland Eigelsreiter <brainfoolong@users.noreply.github.com>
Date: Mon, 29 Nov 2021 06:50:54 +0100
Subject: [PATCH] convert issuer to string prevents php 8.1 errors

By forcing $this->issuer to be string, even if null is set, it prevents throwing errors in PHP 8.1 is `rawurlencode` is not allowed to have null as parameter.

It would be better to force string to be already in `__construct`, but this may create a breaking change for existing users.
---
 lib/TwoFactorAuth.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/TwoFactorAuth.php b/lib/TwoFactorAuth.php
index c46ac17..c94f806 100644
--- a/lib/TwoFactorAuth.php
+++ b/lib/TwoFactorAuth.php
@@ -272,7 +272,7 @@ class TwoFactorAuth
     {
         return 'otpauth://totp/' . rawurlencode($label)
             . '?secret=' . rawurlencode($secret)
-            . '&issuer=' . rawurlencode($this->issuer)
+            . '&issuer=' . rawurlencode((string)$this->issuer)
             . '&period=' . intval($this->period)
             . '&algorithm=' . rawurlencode(strtoupper($this->algorithm))
             . '&digits=' . intval($this->digits);