From b55cee2934d88c75fa2c18404c0879a670c9fe8c Mon Sep 17 00:00:00 2001
From: "J. King" <jking@jkingweb.ca>
Date: Thu, 20 Apr 2023 16:40:06 -0400
Subject: [PATCH] Do not fill in missing booleans in configurations

---
 lib/AbstractSanitizer.php | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/AbstractSanitizer.php b/lib/AbstractSanitizer.php
index 711f4d3..b8b51f2 100644
--- a/lib/AbstractSanitizer.php
+++ b/lib/AbstractSanitizer.php
@@ -532,7 +532,9 @@ abstract class AbstractSanitizer {
             }
             // finally handle the boolean options
             foreach (["allowCustomElements", "allowUnknownMarkup", "allowComments", "allowProcessingInstructions", "nullNamespaceAsHtml"] as $opt) {
-                $out[$opt] = (bool) $config[$opt] ?? self::DEFAULT_CONF[$opt];
+                if (isset($config[$opt])) {
+                    $out[$opt] = (bool) $config[$opt];
+                }
             }
             // use the normalized configuration
             $this->config = $out;
@@ -600,7 +602,9 @@ abstract class AbstractSanitizer {
         }
         // finally handle the boolean options
         foreach (["allowCustomElements", "allowUnknownMarkup", "allowComments", "allowProcessingInstructions", "nullNamespaceAsHtml"] as $opt) {
-            $out[$opt] = $config[$opt];
+            if (isset($config[$opt])) {
+                $out[$opt] = $config[$opt];
+            }
         }
         // return the transformed configuration
         return $out;