From 44078e5f40ce7311df0e97a68405fb1137377d41 Mon Sep 17 00:00:00 2001
From: Julius Beckmann <github@h4cc.de>
Date: Wed, 20 Nov 2013 15:08:50 +0100
Subject: [PATCH] Making Net_SFTP::chdir capable of handling the empty string.

Updated patch after hint from bantu.
---
 phpseclib/Net/SFTP.php | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/phpseclib/Net/SFTP.php b/phpseclib/Net/SFTP.php
index 020d59be..5ebf9d28 100644
--- a/phpseclib/Net/SFTP.php
+++ b/phpseclib/Net/SFTP.php
@@ -635,8 +635,12 @@ class Net_SFTP extends Net_SSH2 {
             return false;
         }
 
-        // Suffix a slash
-        if (!$dir || $dir[strlen($dir) - 1] != '/') {
+        if ($dir === '') {
+            $dir = './';
+        }
+
+        // Suffix a slash if needed
+        if ($dir[strlen($dir) - 1] != '/') {
             $dir.= '/';
         }