`/bin/sh /tmp/rockpingping.sh $nodeName > /tmp/result.txt`;

##</code><code>##

$flag = system("sudo /bin/sh /tmp/sshping.sh > /tmp/result.txt" );      ##  '>' is the redirect operator and test.sh is the shell script
If ($flag == 0 )
{
    // The success result will be stored at result.txt
    // need to open this file and then use it
}
else
{
    // failure case
}