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php用户登入与注销(cookie)

登入界面

<?php    header(‘Content-type:text/html;charset=utf-8‘);       if(isset($_COOKIE[‘username‘]) && $_COOKIE[‘username‘]===‘zeng‘){        exit(‘您已经登入了,请不要重新登入‘);    }    if(isset($_POST[‘submit‘])){        if(isset($_POST[‘username‘]) && isset($_POST[‘password‘]) && $_POST[‘username‘]==‘zengguanling‘ && $_POST[‘password‘]==‘123456‘ ){            if(setcookie(‘username‘,$_POST[‘username‘],  time()+3600)){                header(‘location:skip.php?url=index.php&info=登入成功!3秒后跳转到首面‘);            }  else {                echo ‘cookies设置失败‘;            }        }  else {            header(‘location:skip.php?url=login.php&info=对不起,用户名活密码填写错误!3秒后跳转到登入页面‘);        }    }?><!DOCTYPE html><html lang="zh-CN">    <head>        <meta charset="utf-8">        <title>请登入</title>    </head>    <body>        <form method="post" action="">            姓名:<input type="text" name="username" />            密码:<input type="password" name="password"/>            <input type="submit" name="submit" value="http://www.mamicode.com/登入"/>        </form>    </body></html>

跳转处理页面skip.php

<?php    if(!isset($_GET[‘url‘]) || !isset($_GET[‘info‘])){        exit();    }?><!DOCTYPE html><html>    <head>        <meta charset="utf-8">        <meta http-equiv="refresh" content="3,URL=<?php echo $_GET[‘url‘] ?>"/>        <title>正在跳转中...</title>    </head>    <body>        <div><?php echo $_GET[‘info‘] ?></div>    </body></html>

登入首页index.php

<?php    header(‘Content-type:text/html;charset=utf-8‘);        if(isset($_COOKIE[‘username‘]) && $_COOKIE[‘username‘]===‘zeng‘){        echo "您好!{$_COOKIE[‘username‘]},欢迎回来!";        echo "<a href=http://www.mamicode.com/‘logout.php‘>注销";    }  else {        echo "<a href=http://www.mamicode.com/‘login.php‘>请登入";    }?>

注销处理界面logout.php

<?php    header(‘Content-type:text/html;charset=utf-8‘);    if(isset($_COOKIE[‘username‘]) && $_COOKIE[‘username‘]===‘zeng‘){        if(setcookie(‘username‘,$_POST[‘username‘],time()-3600)){            header(‘location:skip.php?url=index.php&info=注销成功,正在跳转!‘);        }else{            header(‘location:skip.php?url=index.php&info=注销失败,请稍后重试!‘);        }    }?>

 

php用户登入与注销(cookie)