symfony
diff --git a/‎Parser/Tokenizer/TokenizerEscaping.php
Copy file name to clipboardExpand all lines: Parser/Tokenizer/TokenizerEscaping.php
+10-6Lines changed: 10 additions & 6 deletions b/‎Parser/Tokenizer/TokenizerEscaping.php
Copy file name to clipboardExpand all lines: Parser/Tokenizer/TokenizerEscaping.php
+10-6Lines changed: 10 additions & 6 deletions
@@ -65,14 +65,18 @@ public function escapeUnicodeAndNewLine($value)
      */
     private function replaceUnicodeSequences($value)
     {
-        return preg_replace_callback($this->patterns->getUnicodeEscapePattern(), function (array $match) {
-            $code = $match[1];
+        return preg_replace_callback($this->patterns->getUnicodeEscapePattern(), function ($match) {
+            $c = hexdec($match[1]);
 
-            if (bin2hex($code) > 0xFFFD) {
-                $code = '\\FFFD';
+            if (0x80 > $c %= 0x200000) {
+                return chr($c);
+            }
+            if (0x800 > $c) {
+                return chr(0xC0 | $c>>6).chr(0x80 | $c & 0x3F);
+            }
+            if (0x10000 > $c) {
+                return chr(0xE0 | $c>>12).chr(0x80 | $c>>6 & 0x3F).chr(0x80 | $c & 0x3F);
             }
-
-            return mb_convert_encoding(pack('H*', $code), 'UTF-8', 'UCS-2BE');
         }, $value);
     }
 }