From 6bba55420cfd43223e19d46bd8a0707b418f4287 Mon Sep 17 00:00:00 2001
From: ppp0 <philipp.pfaff@cargomedia.ch>
Date: Mon, 15 Jan 2024 11:37:47 +0100
Subject: [PATCH] Avoid calling `str_replace` with `null`

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

diff --git a/src/GatewayRequest.php b/src/GatewayRequest.php
index f90bef5..defe50b 100644
--- a/src/GatewayRequest.php
+++ b/src/GatewayRequest.php
@@ -74,7 +74,7 @@ function ToXMLString()
 //
         foreach ($this->params as $key => $value) {
             $xmlString .= "<" . $key . ">";// Add opening of element
-            $xmlString .= $this->TranslateXML($value);
+            $xmlString .= is_null($value) ? '' : $this->TranslateXML($value);
             $xmlString .= "</" . $key . ">";// Add closing of element
         }