add 7.1.2.0 sourceGuardian PHP 8

Author: SeifertDaniel

.php-cs-fixer.php

@@ -105,8 +105,10 @@ public function decodeJson(?string $encodedValue): mixed
     public function decodeUtf8(?string $encodedValue): mixed
     {
         return unserialize(
-            utf8_decode(
-                html_entity_decode($encodedValue ?? '', ENT_QUOTES)
+            mb_convert_encoding(
+                html_entity_decode($encodedValue ?? '', ENT_QUOTES),
+                'ISO-8859-1',
+                'UTF-8'
             )
         );
     }

Application/Model/Configuration/d3_cfg_mod.php

@@ -101,10 +101,12 @@ public function encodeJson(mixed $decodedValue): string
      */
     public function encodeUtf8(mixed $decodedValue): string
     {
-        return utf8_encode(
+        return mb_convert_encoding(
             serialize(
                 $decodedValue
-            )
+            ),
+            'UTF-8',
+            'ISO-8859-1'
         );
     }