From 973d4a866d773ced38f10ef3925378d720dc11b8 Mon Sep 17 00:00:00 2001
From: ScarWu <xneriscool@gmail.com>
Date: Sun, 11 May 2014 23:36:01 +0800
Subject: [PATCH] add array check

---
 Parsedown.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Parsedown.php b/Parsedown.php
index addffbe..1cf7fe6 100755
--- a/Parsedown.php
+++ b/Parsedown.php
@@ -1041,7 +1041,7 @@ class Parsedown
 
     protected function identifyEscapeSequence($excerpt)
     {
-        if (in_array($excerpt[1], $this->specialCharacters))
+        if (isset($excerpt[1]) && in_array($excerpt[1], $this->specialCharacters))
         {
             return array(
                 'markup' => $excerpt[1],