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Php 取消全局会话变量作为注销按钮

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Php 取消全局会话变量作为注销按钮,php,html,sql,Php,Html,Sql,嘿，Stackoverflow用户 因为我以前在解决一个问题时能得到一些惊人的帮助，所以我被困的时间比我记忆中的要长，我想我会用这个来对付你 使用对用户进行身份验证并终止会话的登录系统，但目前无法识别分配给会话的变量。单击“注销”按钮后，一切看起来都正常工作，但当直接连接到成员页面时，通过在地址栏中键入该页面将加载该页面，而不是重定向到登录页面 Members.php <?PHP session_start(); if (!isset($_SESSION['username'])) { h

嘿，Stackoverflow用户

因为我以前在解决一个问题时能得到一些惊人的帮助，所以我被困的时间比我记忆中的要长，我想我会用这个来对付你

使用对用户进行身份验证并终止会话的登录系统，但目前无法识别分配给会话的变量。单击“注销”按钮后，一切看起来都正常工作，但当直接连接到成员页面时，通过在地址栏中键入该页面将加载该页面，而不是重定向到登录页面

Members.php

<?PHP
session_start();
if (!isset($_SESSION['username'])) {
header('location:login.php');
}
?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>The Animator BETA</title>
<style>
//CSS Has been removed as it's lengthy and unrelated to the issue.
</style>
<!--[if lt IE 9]>

        <script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script>

    <![endif]-->        

    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>

<script>

          $(document).ready(function(){

                $('#login-trigger').click(function(){

                    $(this).next('#login-content').slideToggle();

                    $(this).toggleClass('active');                  



                    if ($(this).hasClass('active')) $(this).find('span').html('&#x25B2;')

                        else $(this).find('span').html('&#x25BC;')

                    })

          });

    </script>
</head>
<body>
<header class="cf">

<nav style="text-align:center"><a href="logout.php">Logout</a></nav>

</header>

<h1 style="text-align:center"> The Animator - BETA</h1>
<hr />
<div id="nav" style="text-align:center">
<ul style="text-align:center">

<li><a href= "#" ><strong>Home</strong></a></li>
<strong><li><a href= "industrial.html" >Industrial</a></li>
<li><a href= "educational.html" >Education</a></li>
<li><a href= "independent.html"  >Independent</a></li>
<li><a href= "emergent.html"  >Emergent</a></li>
<li><a href= "team.html" >Team</a></li>
<li><a href= "project.html"  >Project</a></li>
<li><a href= "budget.html" >Budget</a></li>
<li><a href= "profile.html" >Profile</a></li></strong>

</ul>
</div>
<hr />
<div style="padding-left:19%"><input type="text" value="search" />
<input type="button" value="Search!" name="search"/>
</div>
<div>&nbsp;</div>
<div align="center">
<div><img src="logo.png" width="407" height="345" alt="Logo" usemap="sectors" /></div>

</div>
</div>
<map name="sectors">
  <area shape="rect" coords="72,40,194,165" alt="Industrial" href="industrial.html">
  <area shape="rect" coords="210,38,328,162" alt="Emergent" href="emergent.html">
  <area shape="rect" coords="208,178,331,296" alt="Independent" href="independent.html">
    <area shape="rect" coords="71,177,194,295" alt="Educational" href="educational.html">

</map>
<div>&nbsp;</div>
<div style="text-align:right"></div>
<div>&nbsp;</div>   
<div id="footer"> <hr />
  <p><strong><u><a href="about.html">About The Animator</a> | <a href="contact.html">Contact</a> | <a href="privacy.html">Privacy Policy</a> | <a href="faq.html">FAQ</a></u></strong><u></u></p>
</div>
</body>
</html>


动画师贝塔
//CSS已被删除，因为它冗长且与问题无关。
$（文档）.ready（函数（）{
$（“#登录触发器”）。单击（函数（）{
$（this）.next（“#登录内容”）.slideToggle（）；
$（this.toggleClass（'active'）；
if（$（this.hasClass（'active'））$（this.find（'span'）.html（'▲；'））
else$（this.find（'span'）.html（'▼；'））
})
});
动画师-贝塔



    

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登录页面

<?php

error_reporting(E_ALL);
ini_set('display_errors',"On");

include ('database_connection.php');
if (isset($_POST['formsubmitted'])) {
    // Initialize a session:
session_start();
    $error = array();//this aaray will store all error messages


    if (empty($_POST['e-mail'])) {//if the email supplied is empty 
        $error[] = 'You forgot to enter  your Email ';
    } else {


        if (preg_match("/^([a-zA-Z0-9])+([a-zA-Z0-9\._-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9\._-]+)+$/", $_POST['e-mail'])) {

            $Email = $_POST['e-mail'];
        } else {
             $error[] = 'Your Email Address is invalid  ';
        }


    }


    if (empty($_POST['Password'])) {
        $error[] = 'Please Enter Your Password ';
    } else {
        $Password = $_POST['Password'];
    }


       if (empty($error))//if the array is empty , it means no error found
    { 



        $query_check_credentials = "SELECT * FROM account WHERE (email='$Email' AND passwords='$Password')";



        $result_check_credentials = mysqli_query($dbc, $query_check_credentials);
        if(!$result_check_credentials){//If the QUery Failed 
            echo 'Query Failed ';
        }

        if (@mysqli_num_rows($result_check_credentials) == 1)//if Query is successfull 
        { // A match was made.





            $_SESSION = mysqli_fetch_array($result_check_credentials, MYSQLI_ASSOC);//Assign the result of this query to SESSION Global Variable

            $_SESSION['email'] = $Email; 

           session_start("username");

            header("Location: members.php");



        }else
        { 

            $msg_error= 'Either Your Account is inactive or Email address /Password is Incorrect';
        }

    }  else {



echo '<div class="errormsgbox"> <ol>';
        foreach ($error as $key => $values) {

            echo '  <li>'.$values.'</li>';



        }
        echo '</ol></div>';

    }


    if(isset($msg_error)){

        echo '<div class="warning">'.$msg_error.' </div>';
    }
    /// var_dump($error);
    mysqli_close($dbc);

} // End of the main Submit conditional.



?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Login Form</title>





<style type="text/css">
body {
    font-family:"Lucida Grande", "Lucida Sans Unicode", Verdana, Arial, Helvetica, sans-serif;
    font-size:12px;
}
.registration_form {
    margin:0 auto;
    width:500px;
    padding:14px;
}
label {
    width: 10em;
    float: left;
    margin-right: 0.5em;
    display: block
}
.submit {
    float:right;
}
fieldset {
    background:#EBF4FB none repeat scroll 0 0;
    border:2px solid #B7DDF2;
    width: 500px;
}
legend {
    color: #fff;
    background: #80D3E2;
    border: 1px solid #781351;
    padding: 2px 6px
}
.elements {
    padding:10px;
}
p {
    border-bottom:1px solid #B7DDF2;
    color:#666666;
    font-size:11px;
    margin-bottom:20px;
    padding-bottom:10px;
}
a{
    color:#0099FF;
font-weight:bold;
}

/* Box Style */


 .success, .warning, .errormsgbox, .validation {
    border: 1px solid;
    margin: 0 auto;
    padding:10px 5px 10px 60px;
    background-repeat: no-repeat;
    background-position: 10px center;
     font-weight:bold;
     width:450px;

}

.success {

    color: #4F8A10;
    background-color: #DFF2BF;
    background-image:url('images/success.png');
}
.warning {

    color: #9F6000;
    background-color: #FEEFB3;
    background-image: url('images/warning.png');
}
.errormsgbox {

    color: #D8000C;
    background-color: #FFBABA;
    background-image: url('images/error.png');

}
.validation {

    color: #D63301;
    background-color: #FFCCBA;
    background-image: url('images/error.png');
}



</style>

</head>
<body>


<form action="login.php" method="post" class="registration_form">
  <fieldset>
    <legend>Login Form  </legend>

    <p>Enter Your username and Password Below  </p>

    <div class="elements">
      <label for="name">Email :</label>
      <input type="text" id="e-mail" name="e-mail" size="25" />
    </div>

    <div class="elements">
      <label for="Password">Password:</label>
      <input type="password" id="Password" name="Password" size="25" />
    </div>
    <div class="submit">
     <input type="hidden" name="formsubmitted" value="TRUE" />
      <input type="submit" value="Login" />
    </div>
  </fieldset>
</form>
<button onclick="window.location='theanimator.html';">Go Back!</button>
</body>
</html>

您的注销页面必须如下所示：


<?php

//start the session
session_start();
//this will destroy the session that is started
session_destroy();
header('Location: login.php');
exit;
?>






问题是，您没有破坏
会话
，因此当您返回页面时，会话存在


您也可以查看查看
$\u会话['username']
，但您取消设置的
$\u会话['email']
永远不会工作。
不幸的是，这不起作用。如果直接加载到“注销”按钮，则在单击“注销”按钮后不应加载“成员”页面。仍然不应加载。即使使用未设置的$\u session['username']也不适用于“成员”页面如果删除此项会发生什么：
session\u start（“username”）你不需要它，因为会话已经启动了。我在想，但是稍后在配置文件页面上会需要该会话，该页面用于比较sql数据库的结果，以匹配用户名和电子邮件+名称+密码等。我现在明白了，我们没有启动会话。添加
session_start（）在
会话之前销毁
另请参见答案中的编辑。现在它应该可以工作了：）

<?php

//start the session
session_start();
//this will destroy the session that is started
session_destroy();
header('Location: login.php');
exit;
?>