snoopy.class.php中php模拟登录代码解析

<?
include "Snoopy.class.php";
$snoopy = new Snoopy;
$snoopy->fetchtext(http://www.jb200.com);
echo $snoopy->results;
?>

<?
include "Snoopy.class.php";
$snoopy = new Snoopy;
$snoopy->fetchlinks(http://www.jb200.com);
print_r($snoopy->results);
?>

<?php
include_once 'Snoopy.class.php';
$snoopy=new Snoopy();
$snoopy->fetch('http://xxx.cn/blog/getcode.asp');
preg_match('/JSESSIONID=([w]+);/', $snoopy->headers[2],$sessionid);
$jsessionid=$sessionid[1];
$imgcode=base64_encode($snoopy->results);
?>
<form action="?act=sub" method="post">
<table>
  <tr>
  <th>用户名</th>
  <td><input name="user"></td>
  </tr>
  <tr>
  <th>密码</th>
  <td><input name="pass"></td>
  </tr>
  <tr>
  <th>验证码</th>
  <td><input name="loginValidateCode">
  <img alt="" src="data:image/gif;base64,<?php echo $imgcode?>">
  </td>
  </tr>
  <tr>
  <td><input type="submit"></td>
  </tr>
</table>
<input type="hidden" name="jsessionid" value="<?php echo $jsessionid?>">
</form>
<?php
if($_GET['act']=='sub'){
$snoopy->cookies['JSESSIONID']=$_POST['jsessionid'];
$snoopy->submit('http://xxx.cn/blloginok.html',$_POST);
echo $snoopy->results;
}
?>