(cookie)记住密码，过期登出注销

演示代码

index.php代码

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script>
        function automatic(){
            var username=document.getElementById("username").value;
            <?
            if (is_array($_COOKIE['profile']) || is_object($_COOKIE['profile']))
            {
                foreach($_COOKIE['profile'] as $k=>$v) {
            ?>
                var name1="<? echo $k;?>";
                if(username=="<? echo $k;?>"){
                    document.getElementById("password").value="<? echo $v;?>";
                }

            <?
            }
            }
            ?>
        }
</script>
<?
    if(isset($_COOKIE['username'])){
        echo '您已登录，用户名：'.$_COOKIE['username'];
        echo "<br><a href=\"logout.php\">登出</a>";
    }else{
?>
<form method="post" action="check.php">
    <table width="300" border="1" align="center" cellpadding="0" cellspacing="0">     
     <tr> 
     <td colspan="2" align="center"><b>记住用户名和密码</b></td> 
     </tr>        
     <tr align="center">
         <td>用 户 名：</td>
         <td><input onchange="automatic()" type="text" id="username" value="<?php echo $_COOKIE['name'];?>" name="username"></td>
     </tr>
     <tr align="center">
         <td>密码：</td>
         <td><input type="text" id="password" name="password" ></td>
     </tr>
     <tr align="center">
         <td>记住用户名和密码</td>
         <td>
            <?php 
                if($_COOKIE['remember'] == 1)
                    {?><input type="checkbox" name="remember" value="1" checked><?php }
                else{($_COOKIE['remember'] == "")?><input type="checkbox" name="remember" value="1"><?php }?>

         </td>
     </tr>
     <tr align="center">
        <td colspan="2"><input type="submit" name="submit" value="提交" /></td>
     </tr>
    </table>
</form>
<?       
    }
?> 

check.php

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<?php

    if(isset($_POST['submit'])){
        $username = $_POST['username'];
        $password = $_POST['password'];
        $remember = $_POST['remember'];
        //包含数据库连接文件
        $conn = mysqli_connect('localhost','root','root','tuiguang')or ('error');

        $result=mysqli_query($conn,"select * from user where username ='{$_POST['username']}' ");//查出对应用户名的信息，
        while ($row=mysqli_fetch_array($result)) {//while循环将$result中的结果找出来 
            $dbusername=$row["username"]; 
            $dbpassword=$row["password"]; 
        }       

        if(isset($_POST['username']) && isset($_POST['password']) && $_POST['username']== $dbusername && $_POST['password']==$dbpassword ){
        //登入成功
            //设置$_COOKIE['username']有效期为30秒        
            setcookie(username, $password,time()+30);
            if($remember == 1){
                $profile='profile['.$username.']';
                setcookie($profile, $password,time()+3600); 
                setcookie('remember',$remember,time()+3600);
            } 
            echo $password;echo $password;
            echo "登入成功";
            header('location:index.php');

        }else {
            //登入失败
            echo "对不起，用户名活密码填写错误！";
            header('location:index.php');
        }

//  echo "<br>数组\$_COOKIE['profile']中的值";
//  if (is_array($_COOKIE['profile']) || is_object($_COOKIE['profile']))
//  {
//      foreach($_COOKIE['profile'] as $k=>$v) {
//          echo '<br>用户名:'.$k.'密码：'.$v;    
//      }
//  }
//  echo '<br/>';
//  print_r(($_COOKIE['profile']));

    }else{
        echo "禁止直接访问！";
    } 
?>

logout.php

<?php
    setcookie("username","$remember",time()-3600);
    header('location:index.php');
?>

github源代码文件下载https://github.com/eyunzhu/php/tree/master/cookieEx