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HomeBackend DevelopmentPHP TutorialPHP+MYSQL会员系统的开发实例教程_php技巧

本文通过一个简单的实例完成了完整的PHP+MySQL会员系统功能。是非常实用的一个应用。具体实现步骤如下:

一、会员系统的原理:
 
  登陆-->判断-->保持状态(Cookie或Session)-->验证状态及其权限

二、会员系统的安全:

1、学会使用常量提高md5安全性
2、Cookie/ Session 少用明文信息
3、Session安全性要大于Cookie
4、使用Cookie/ Session读取信息 尽量增加判断信息
5、Cookie/ Session内容要精简
6、对于错误信息及时销毁Cookie/ Session

三、数据库test,表user_list,及其字段

  uid     m_id     username     password
  1       1        admin        291760f98414679e3fd3f9051b19b6f7
  2       2        admin2       895785cfa5d8157f4d33c58ae0f55123

password:分别为md5(admintest100)、md5(admin2test100)即密码是与常量test100绑定后,再经过加密储存到数据库中的,这一步可以在注册时设置。

四、配置页面m_config.php:

<&#63;php
 session_start();
 //数据库连接
 $conn=mysql_connect('localhost','root','');
 mysql_select_db('test',$conn);
 //定义常量
 define(ALL_ps,"test100");
 //查看登录状态与权限
 function user_shell($uid,$shell,$m_id){
   $sql="select * from user_list where `uid`='$uid'"; 
   $query=mysql_query($sql);
   $us=is_array($row=mysql_fetch_array($query));
   $shell=$us &#63; $shell==md5($row[username].$row[password].ALL_PS):FALSE;
   if($shell){
     if($row[m_id]<=$m_id){//$row[m_id]越小权限越高,为1时权限最高
       return $row;
     }else{
       echo "你的权限不足,不能查看该页面";
       exit(); 
     }
   }else{
     echo "登录后才能查看该页";
     exit(); 
   } 
 }
 //设置登录超时
 function user_mktime($onlinetime){
    $new_time=mktime();
    echo $new_time-$onlinetime."秒未操作该页面"."<br>";
    if($new_time-$onlinetime>'10'){//设置超时时间为10秒,测试用
      echo "登录超时,请重新登录";
      exit();
      session_destroy();
    }else{
      $_SESSION[times]=mktime();
    }
 }
&#63;> 

五、登录页面m_user.php:

<&#63;php
 include("m_config.php");
 //echo md5("admin2".ALL_PS);
 if($_POST[submit]){
  $username=str_replace(" ","","$_POST[username]");
  $sql="select * from user_list where `username`='$username'"; 
  $query=mysql_query($sql);
  $us=is_array($row=mysql_fetch_array($query));
  $ps=$us &#63; md5($_POST[password].ALL_PS)==$row[password] : FALSE;
  if($ps){
    $_SESSION[uid]=$row[uid];
    $_SESSION[user_shell]=md5($row[username].$row[password].ALL_PS);
    $_SESSION[times]=mktime();//取得登录时忘该的时间
    echo "登录成功";
  }else{
    echo "用户名或密码错误";
    session_destroy();//密码错误时消除所有的session
  }
 }
&#63;>
<form action="" method="post">
 用户名:<input name="username" type="text" /><br />
 用户名:<input name="password" type="password" /><br />
 验证码:<input name="code" type="code" />5213<br /><br />
 <input name="submit" type="submit" value="登录" />
</form>

六、设置了权限及超时的页面m_zhuangtai.php:

<&#63;php
 include("m_config.php"); 
 $arr=user_shell($_SESSION[uid],$_SESSION[user_shell],1);//设置该页面只有权限为1时即最高权限的才能访问
 
 user_mktime($_SESSION[times]);//判断是否超时10秒
 
 //echo $_SESSION[times]."<br>";//登录时该的时间
 //echo mktime()."<br>";//当前日期
 //echo $arr[username]."<br>";
 //echo $arr[uid]."<br>";
 
&#63;>

有权限方能查看的内容

七、测试结果:
 
1、用sss,sssssss登录,提示:用户名或密码错误。查看m_zhuangtai.php,提示:登录后才能查看该页。
2、用admin admin登录后,因为权限为1,所以可以查看m_zhuangtai.php页面的内容。
3、用admin admin登录后,因为权限为1,所以可以查看m_zhuangtai.php页面的内容,但10秒后再刷新,提示:X秒未操作该页面 登录超时,请重新登录。
4、用admin2 admin2登录后,因为权限为2,所以无法查看m_zhuangtai.php页面的内容,提示:你的权限不足,不能查看该页面。

希望本文所述实例对大家PHP程序开发有所帮助。

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