Remove use of `utf8_encode` / `utf8_decode`

These functions will be deprecated with PHP 8.2.

diff --git a/wcfsetup/install/files/lib/util/StringUtil.class.php b/wcfsetup/install/files/lib/util/StringUtil.class.php
index dc981c3dff4f4ec3f9aeb42a23821c6333eab6e6..a65fdff17466055293f6e7dcfde76024f2de055f 100644 (file)
--- a/wcfsetup/install/files/lib/util/StringUtil.class.php
+++ b/wcfsetup/install/files/lib/util/StringUtil.class.php
@@ -535,13 +535,6 @@ final class StringUtil
      */
     public static function convertEncoding($inCharset, $outCharset, $string)
     {
-        if ($inCharset == 'ISO-8859-1' && $outCharset == 'UTF-8') {
-            return \utf8_encode($string);
-        }
-        if ($inCharset == 'UTF-8' && $outCharset == 'ISO-8859-1') {
-            return \utf8_decode($string);
-        }
-
         return \mb_convert_encoding($string, $outCharset, $inCharset);
     }