PHP数据流应用的一个简单实例

　　<?php

　　$count = 5;

　　start:

　　if($count < 5) echo "You can try {$count} time, ";

　　echo "Put Password: ";

　　$handle = fopen ("php://stdin","r");

　　$line = fgets($handle);

　　if(trim($line) != '123456'){

　　$count--;

　　if(!$count) goto error;

　　goto start;

　　}

　　goto success;

　　error:

　　echo "Please try after 1 hour!";

　　goto out;

　　success:

　　echo "Logined!";

　　out:

　　?>