From 488db53bf7cbd90d5910838162b275f43e16363b Mon Sep 17 00:00:00 2001
From: lightray22 <lightray22@raybeck.org>
Date: Sun, 21 Feb 2021 20:12:26 +0000
Subject: [PATCH] fix undefined index notice in stream touch()

---
 phpseclib/Net/SFTP/Stream.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/phpseclib/Net/SFTP/Stream.php b/phpseclib/Net/SFTP/Stream.php
index fb976fd0c..161e734b3 100644
--- a/phpseclib/Net/SFTP/Stream.php
+++ b/phpseclib/Net/SFTP/Stream.php
@@ -465,7 +465,9 @@ function _stream_metadata($path, $option, $var)
         //     and https://github.com/php/php-src/blob/master/main/php_streams.h#L592
         switch ($option) {
             case 1: // PHP_STREAM_META_TOUCH
-                return $this->sftp->touch($path, $var[0], $var[1]);
+                $time = isset($var[0]) ? $var[0] : null;
+                $atime = isset($var[1]) ? $var[1] : null;
+                return $this->sftp->touch($path, $time, $atime);
             case 2: // PHP_STREAM_OWNER_NAME
             case 3: // PHP_STREAM_GROUP_NAME
                 return false;