cofig.php
<?php /**********************系统常量定义***********************/ /*数据库配置信息*/ $db_host = "localhost"; $db_user = "123456"; $db_pwd = "123456"; $db_name = "shujuku"; $db_prefix = "01_"; /*鼠标放到行上的效果*/ $onmouseover="onmouseout=this.style.backgroundColor='' onmouseover=this.style.backgroundColor='#f6f6f6'";
functions.php
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<?php
/*****************连接数据库函数*********************/
function getLink($db_host,$db_user,$db_pwd,$db_name)
{
//连接数据库
$link = @mysql_connect($db_host,$db_user,$db_pwd);
if(!$link)
{
echo "<li>MySQL服务器连接失败，请与管理员联系</li>";
exit();
}
if(!mysql_select_db($db_name))
{
echo "<li>MySQL数据库选择失败，请与管理员联系</li>";
exit();
}
mysql_query("set names utf8");
//连接标识符返回
return $link;
}conn.php
<?php
//设置当前页面字符集为utf8
header("content-type:text/html; charset=utf-8");
/*包含文件*/
require("config.php");
require("functions.php");
//连接数据库
$link = getLink($db_host,$db_user,$db_pwd,$db_name);
//echo "123";login.php
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>后台登陆</title> </head> <body> <form id="form1" name="form1" method="post" action="login_check.php"> <table width="200" border="0" cellpadding="0" cellspacing="0"> <tr> <td>用户名：</td> <td><input type="text" name="username" id="username" size="10" maxlength="20" /></td> </tr> <tr> <td>密码：</td> <td><input type="password" name="password" id="password" size="10" maxlength="20" /></td> </tr> <tr> <td> </td> <td> <input type="submit" name="btnlogin" id="btnlogin" value="登陆" /> <input type="hidden" name="ac" value="login1" /> </td> </tr> </table> </form> </body> </html>
login_check.php
<?php
//包含数据库的文件
require("include/conn.php");
//判断表单数据是否有login.php传过来的
if(isset($_POST["ac"]) && $_POST["ac"] == "login1")
{
// echo "登陆成功！";
//获取用户名和密码
$username = trim($_POST["username"]);
$password1 = trim($_POST["password"]);
$password = md5($password1);
// echo $password;
//查询数据库中的账号和密码，与用户输入的账号和密码是否匹配
$sql = "SELECT * FROM {$db_prefix}admin WHERE username='$username' and password='$password'";
$result = mysql_query($sql);
$records = mysql_num_rows($result);
// echo $records;
//判断记录总数是否为1，如果为1则将用户登陆信息写入数据库，如果为0，跳转登陆页面
if($records == 1)
{
$lastloginip = $_SERVER["REMOTE_ADDR"];
$lastlogintime = time();
// echo $lastlogintime;
//更新数据库
$sql = "UPDATE {$db_prefix}admin SET lastloginip=
'$lastloginip', lastlogintime=$lastlogintime, loginhits=loginhits+1 WHERE username='$username'";
// if(mysql_query($sql))
// {
// $message = "登陆成功！";
// $url = "login.php";
// echo "<script>location.href='success.php?url=$url&message=$message'</script>";
// exit();
// }
}else
{
$message = "用户名或密码错误，请重新登陆！";
echo "<script>location.href='error.php?message=$message'</script>";
exit();
}
}else
{
$message = "非法用户！";
echo "<script>location.href='error.php?message=$message'</script>";
exit();
}
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