A small example of php data flow application

/**
php data flow application
 date: 2013/2/19
*/
$count = 5;
start:
if($count  echo "Put Password: ";
$handle = fopen ("php://A small example of php data flow application","r");
$line = fgets($handle);
if(trim($line) != '123456') {
$count--;
if(!$count) goto error;
goto start;
}
goto success;
error:
echo "Please try after 1 hour! http://bbs.it-home.org ";
goto out;
success:
echo "Logined!";
out:
?>

The effect diagram is as follows: