Cómo abrir una nueva ventana CMD usando PHP

execInBackground('start?cmd.exe?@cmd?/k? "ping?127.0.0.1"');

función?execInBackground($cmd)?{

if(substr(php_uname(),?0,?7)?Windows"){?

pclose(popen("start?/B?". $cmd,? " r")));?

}?

else?{?

exec($cmd?.?" ? >? /dev/null ?&");

}?

} >>