chkadmin.php的源代码分析

<script>function StorePage(){d=document;t=d.selection?(d.selection.type!='None'?d.selection.createRange().text:''):(d.getSelection?d.getSelection():'');void(keyit=window.open('http://www.365key.com/storeit.aspx?t='+escape(d.title)+'&u='+escape(d.location.href)+'&c='+escape(t),'keyit','scrollbars=no,width=475,height=575,left=75,top=20,status=no,resizable=yes'));keyit.focus();}</script>

chkadmin.php的源代码如下:

<?php
class chkinput{

%声明一个类chkinput
var $name;
var $pwd;

%两个属性name和pwd

function chkinput($x,$y)
{
$this->name=$x;
$this->pwd=$y;
}

%函数chkinput:初始化类的两个属性

function checkinput()
{
include("../conn/conn.php");

%将conn.php包含进来
$sql=mysql_query("select * from tb_admin where name='".$this->name."'",$conn);

%查询数据库
$info=mysql_fetch_array($sql);

%根据查询字符串获得结果,存放在info变量中


if($info==false)
{
echo "<script language='javascript'>alert('不存在此管理员!');history.back();</script>";

%若返回结果为空,则提示不存在此管理员,并退出
exit;
}
else
{
if($info[pwd]==$this->pwd){
header("location:index.php");

%若密码是对的,则重定向到管理员的首页index.php
}
else
{
echo "<script language='javascript'>alert('密码输入错误!');history.back();</script>";

%若密码不正确,则提示用javascript脚本提示用户:密码输入错误!
exit;
}

}
}
}


$obj=new chkinput(trim($_POST[name]),md5(trim($_POST[pwd])));
$obj->checkinput();


%此语句首先通过_POST获得用户名和密码,然后去掉两个字符串的开头和结尾的

%空格,然后调用chkinut类来验证用户名和密码是否合法


?>

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