From 36235835e89145b63780e6770af7cd3565676161 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Tim=20D=C3=BCsterhus?= <duesterhus@woltlab.com>
Date: Tue, 16 Dec 2014 23:52:54 +0100
Subject: [PATCH] Properly support an empty escape in Highlighter.class.php

---
 .../lib/system/bbcode/highlighter/Highlighter.class.php   | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/Highlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/Highlighter.class.php
index 64762f1911..fe0d2f055e 100644
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/Highlighter.class.php
+++ b/wcfsetup/install/files/lib/system/bbcode/highlighter/Highlighter.class.php
@@ -177,7 +177,13 @@ abstract class Highlighter extends SingletonFactory {
 			
 			$opening = preg_quote($opening);
 			$closing = preg_quote($closing);
-			$quotesRegEx .= $opening.'(?>[^'.$closing.$quotedEscapeSequence.']|'.$quotedEscapeSequence.'.)*'.$closing;
+			
+			if ($quotedEscapeSequence) {
+				$quotesRegEx .= $opening.'(?>[^'.$closing.$quotedEscapeSequence.']|'.$quotedEscapeSequence.'.)*'.$closing;
+			}
+			else {
+				$quotesRegEx .= $opening.'(?>[^'.$closing.$quotedEscapeSequence.'])*'.$closing;
+			}
 		}
 		
 		if ($quotesRegEx !== '') {
-- 
2.20.1