Question : PHP Notice:  Undefined offset:  1

Hi to all,

Used the following command to monitor our servers
<?php
$cmd = shell_exec("ping 192.168.1.10 -c4" );
$data_time = explode("received, ",$cmd);
$data_ms = explode("% packet loss",$data_time[1]);
if ($data_ms[0]=='0' or $data_ms[0]=='50' or $data_ms[0]=='25') {$dc_staff="Up";} else $dc_staff="Down";
//echo $data_time[1]. "____";
?>

to excute the command:
http://10.5.2.22/gnokii-SMS/ping-servers.php
or
/wget -O - -q http://10.5.2.22/gnokii-SMS/ping-servers.php

I get following error:
sh: ping: command not found
[Thu Jul 29 12:32:06 2010] [error] [client 10.5.2.22] PHP Notice:  Undefined offset:  1 in /var/www/gnokii-SMS/ping-servers.php on line 5

any solution?

Answer : PHP Notice:  Undefined offset:  1

the old message have the message header and mapi properties of the original mailbox and cannot be changed