看看黑客如何破解验证码机制(1)

CODE:

＜?

  /*

  *   Filename: authpage.php

  *   Author:   hutuworm

  *   Date:   2003-04-28

  *   @Copyleft hutuworm.org

  */

srand((double)microtime()*1000000);

//验证用户输入是否和验证码一致

if(isset($HTTP_POST_VARS['authinput']))

{

if(strcmp($HTTP_POST_VARS['authnum'],$HTTP_POST_VARS

['authinput'])==0)

echo "验证成功！";

else

echo "验证失败！";

}

//生成新的四位整数验证码

while(($authnum=rand()%10000)＜1000);

?＞

＜form action=authpage.php method=post＞

＜table＞

请输入验证码：＜input type=text name=authinput 

style="width: 80px"＞＜br＞

＜input type=submit name="验证" value="提交验证码"＞

＜input type=hidden name=authnum value=＜? echo $authnum; ?＞＞

＜img src=authimg.php?authnum=＜? echo $authnum; ?＞＞

＜/table＞

; ＜/form＞ 


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