php之session代码
代码只放通过SID判断使用cookie还是session
<!--?php session_start(); echo session_id().<br-->; //跳转页面不能不是header if(isset($_POST[sub])){ include conn.inc.php; $sql=select id from users where name='{$_POST[name]}' and password='.md5($_POST[password]).'; $result=$mysqli->query($sql); //保存数据 if($result->num_rows > 0){ $row=$result->fetch_assoc(); $_SESSION[username]=$_POST[name]; $_SESSION[uid]=$_POST[uid]; $_SESSION[isLogin5]=1; //跳转界面 echo '<script>';|r| echo location='index.php?.SID.'; //SID 常量如果开启cookie则使用cookie,如果没开启就用session|r| echo '</script>'; } echo 用户名密码有误; } ?>
conn.inc.php
<!--?php $mysqli=new mysqli(localhost,root,heyifeng19930924,sqldb);</pre--> <strong>comm.php</strong>
<!--?php session_start(); //判断:如果没登录自动跳转到登录页面 if(!$_SESSION[isLogin5]){ header(Location:http://blog.csdn.net/hyf93924/article/details/login.php); }</pre--> <strong>index.php</strong>
<!--?php include comm.php; //判断是否登录成功 include conn.inc.php; echo 用户<b-->.$_SESSION[username].你好!这是网站首页; echo session_id(). ; echo 你的权限如下: ; $sql=select allow_1,allow_2,allow_3,allow_4 from users where id='{$_SESSION[uid]}'; $result=$mysqli->query($sql); $user=$result->fetch_assoc(); if($user[allow_1]){ echo 111111111111 ; } if($user[allow_2]){ echo 222222222222 ; } if($user[allow_3]){ echo 333333333333 ; } if($user[allow_4]){ echo 444444444444 ; } ?> >第二页 >第三页 >退出
test.php和test2.php编写上和index.php如出一辙
<!--?php include comm.php; //判断是否登录成功 $username=$_SESSION[username]; //取出用户名 $sid=session_id(); //开启session session_start(); //情况session值 $_SESSION=array(); //删除客户端的在cookie中的sessionid if(isset($_COOKIE[session_name()])){ setCookie(session_name(),'',time()-3600,'/'); //一定要写上第四个参数(路径) } //彻底销毁session session_destroy(); echo $username.再见!; echo $sid; ?-->
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