Fixed usage of deprecated method

diff --git a/wcfsetup/install/files/lib/util/StringUtil.class.php b/wcfsetup/install/files/lib/util/StringUtil.class.php
index 5c15871ed58227bbe1395774977dfa0f4b14ea81..7589fbfe854322f1a90ff0ec111b1cb681faeafa 100644 (file)
--- a/wcfsetup/install/files/lib/util/StringUtil.class.php
+++ b/wcfsetup/install/files/lib/util/StringUtil.class.php
@@ -377,7 +377,7 @@ final class StringUtil {
        public static function split($string, $length = 1) {
                $result = array();
                for ($i = 0, $max = self::length($string); $i < $max; $i += $length) {
-                       $result[] = self::substring($string, $i, $length);
+                       $result[] = mb_substr($string, $i, $length);
                }
                return $result;
        }
@@ -396,7 +396,7 @@ final class StringUtil {
                        $haystack = mb_strtolower($haystack);
                        $needle = mb_strtolower($needle);
                }
-               // using substring and === is MUCH faster for long strings then using indexOf.
+               // using mb_substr and === is MUCH faster for long strings then using indexOf.
                return mb_substr($haystack, 0, mb_strlen($needle)) === $needle;
        }