From 7e115b445fc7e6a2aebce33039c40b7b2b208ace Mon Sep 17 00:00:00 2001
From: neoan <stefan.roehrl@gmail.com>
Date: Mon, 23 Jan 2023 20:30:41 -0500
Subject: [PATCH] Convert null to empty string in substitution to avoid
 deprecation error as of php8.1

---
 Interpreter.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Interpreter.php b/Interpreter.php
index 2ec10c5..e7bdf18 100644
--- a/Interpreter.php
+++ b/Interpreter.php
@@ -252,7 +252,7 @@ private function replaceVariables(array $matches, string $content): string
             $lookFor = trim($pair[2]);
             $substitutes = $this->handleSubstitutions($lookFor);
             if(array_key_exists($lookFor, $this->flatData)){
-                $content = str_replace($pair[0], $this->flatData[$lookFor], $content);
+                $content = str_replace($pair[0], $this->flatData[$lookFor] ?? '', $content);
                 foreach ($substitutes as $substitute){
                     $content = str_replace($substitute[0], $substitute[1], $content);
                 }