From d95859d1bcb5ffcdcfab13621286709c935fad4b Mon Sep 17 00:00:00 2001
From: Sami Puro <sami@aviadesign.fi>
Date: Sat, 24 Oct 2026 17:09:03 +0300
Subject: [PATCH] Fix. Patch. utf8_decode() polyfill turned non-ASCII
 characters into NUL bytes

---
 lib/cleantalk-php-patch.php | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/lib/cleantalk-php-patch.php b/lib/cleantalk-php-patch.php
index 62f932d..6e90ab1 100644
--- a/lib/cleantalk-php-patch.php
+++ b/lib/cleantalk-php-patch.php
@@ -56,18 +56,18 @@ function utf8_decode($string)
         $stringlength  = strlen($string);
         while ($offset < $stringlength) {
             if ((ord($string[$offset]) | 0x07) == 0xF7) {
-                $charval = ((ord($string[($offset + 0)]) & 0x07) << 18) &
-                           ((ord($string[($offset + 1)]) & 0x3F) << 12) &
-                           ((ord($string[($offset + 2)]) & 0x3F) << 6) &
+                $charval = ((ord($string[($offset + 0)]) & 0x07) << 18) |
+                           ((ord($string[($offset + 1)]) & 0x3F) << 12) |
+                           ((ord($string[($offset + 2)]) & 0x3F) << 6) |
                            (ord($string[($offset + 3)]) & 0x3F);
                 $offset  += 4;
             } elseif ((ord($string[$offset]) | 0x0F) == 0xEF) {
-                $charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) &
-                           ((ord($string[($offset + 1)]) & 0x3F) << 6) &
+                $charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) |
+                           ((ord($string[($offset + 1)]) & 0x3F) << 6) |
                            (ord($string[($offset + 2)]) & 0x3F);
                 $offset  += 3;
             } elseif ((ord($string[$offset]) | 0x1F) == 0xDF) {
-                $charval = ((ord($string[($offset + 0)]) & 0x1F) << 6) &
+                $charval = ((ord($string[($offset + 0)]) & 0x1F) << 6) |
                            (ord($string[($offset + 1)]) & 0x3F);
                 $offset  += 2;
             } elseif ((ord($string[$offset]) | 0x7F) == 0x7F) {