Merge "JpegMetadataExtractor: Don't fail when garbage bytes are present between JPEG...

[lhc/web/wiklou.git] / includes / libs / StringUtils.php

diff --git a/includes/libs/StringUtils.php b/includes/libs/StringUtils.php
index 2af3868..6b10c09 100644 (file)
--- a/includes/libs/StringUtils.php
+++ b/includes/libs/StringUtils.php
@@ -41,8 +41,10 @@ class StringUtils {
        static function isUtf8( $value ) {
                $value = (string)$value;
 
-               // Before PHP 5.4, values above U+10FFFF are incorrectly allowed, so we have to
-               // check for them separately.
+               // HHVM 3.4 and older come with an outdated version of libmbfl that
+               // incorrectly allows values above U+10FFFF, so we have to check
+               // for them separately. (This issue also exists in PHP 5.3 and
+               // older, which are no longer supported.)
                static $newPHP;
                if ( $newPHP === null ) {
                        $newPHP = !mb_check_encoding( "\xf4\x90\x80\x80", 'UTF-8' );