在本文中，我们将为您详细介绍PHP–按Back按钮后的Session_Destroy的相关知识，并且为您解答关于php按键的疑问，此外，我们还会提供一些关于darkestofdaysphp中sessi
在本文中，我们将为您详细介绍PHP – 按Back按钮后的Session_Destroy的相关知识，并且为您解答关于php按键的疑问，此外，我们还会提供一些关于darkest of days php中session_unset与session_destroy的区别分析、PHP session destroyed / lost after header、php session_decode函数只要解码的功能，不想存入$_SESSION里头、PHP SESSION_destroy 和 SESSION_unset的有用信息。
本文目录一览：- PHP – 按Back按钮后的Session_Destroy（php按键）
- darkest of days php中session_unset与session_destroy的区别分析
- PHP session destroyed / lost after header
- php session_decode函数只要解码的功能，不想存入$_SESSION里头
- PHP SESSION_destroy 和 SESSION_unset
PHP – 按Back按钮后的Session_Destroy（php按键）
这是我的问题：
我有一个名为login.PHP的登录页面(不包含HTML代码).当用户正确输入他的凭证时,他被重定向到特定页面;我们将为此示例说test.PHP.该页面上唯一的链接注销当前会话,并将用户返回到index.html.
我的问题是,如果用户按下后退按钮,它将返回login.PHP,你会得到一个空白页面.如果您离开该空白页面,则无法返回test.PHP,因此无法注销该会话.
我最初的想法是使用Javascript禁用后退按钮导航.最终我发现这不起作用,因为如果用户找到了一种离开该页面而没有注销的方法,那么它们将被卡在该会话中并且login.PHP将是空白的.
那么如果按下后退按钮,有没有办法结束当前会话？或者如果重新加载login.PHP？我不太熟悉PHP,所以非常感谢详细解释.
以下是登录页面的代码：
<?PHP
/**
* The idea of this application is to secure any page with one link. I kNow some of the professionals
* will agree with me considering the way it has been done,usually you wouldnt put any other information such as
* HTML/CSS with a class file but in this case its unavoidable. This is to make it easier for the non techys to use.
* @author John Crossley <john@suburbanarctic.com>
* @version Version 2
**/
// Turn off error reporting.
error_reporting(0);
# Start a new session,regenerate a session id if needed.
session_start();
if (!isset($_SESSION['INIT'])) {
session_regenerate_id();
$_SESSION['INIT'] = TRUE;
}
class JC_fsl {
public static $_init;
protected $_users = array();
# Script configuration
protected static $_script_name;
protected static $_admin_email;
protected static $_admin_name;
private static $_version = '{Version 2.0.1}';
protected function __construct() {
if (!isset($_SESSION['LOGIN_ATTEMPTS']))
$_SESSION['LOGIN_ATTEMPTS'] = 0;
// Default user admin added.
$this->_users = array(
array(
'USERNAME' => 'admin','PASSWORD' => 'master13','EMAIL' => 'seth@procstaff.com','LOCATION' => 'master.PHP')
);
}
public function __toString() {
return 'SCRIPT NAME :: ' . self::$_script_name . "<br />" .
' ADMIN EMAIL :: ' . self::$_admin_email . "<br />" .
' ADMIN NAME :: ' . self::$_admin_name . "<br />" .
' FSL VERSION :: ' . self::$_version;
}
/**
* This method allows you to peek inside the users list,so you can view their information.
**/
public function peek() {
var_dump($this->_users);
}
protected function ready_array($username,$password,$email,$location = 'index.html',$access = false) {
return array('USERNAME' => $username,'PASSWORD' => $password,'EMAIL' => $email,'LOCATION' => $location);
}
public function add($username,$location = 'index.html') {
$add = $this->ready_array($username,$location);
$this->_users[] = $add;
}
public static function logout() {
if (isset($_SESSION['LOGGED_IN'])) {
if (session_destroy())
header('Location: index.html');
}
}
/**
* This method increments or returns login attempts.
* @param <bool> true to increment by 1 and false to return.
*/
public static function attempts($add = false) {
if ($add === true)
$_SESSION['LOGIN_ATTEMPTS'] += 1;
else
return $_SESSION['LOGIN_ATTEMPTS'];
}
public function site_name() {
return self::$_script_name;
}
public function validate($un,$pw) {
# Check all of the arrays for the user
for ($i=0;$i<count($this->_users);$i++) {
if (array_key_exists('USERNAME',$this->_users[$i])) {
if ($this->_users[$i]['USERNAME'] == $un) {
# We have found the user check to see if there password matches also.
$info = $this->_users[$i];
if ($info['USERNAME'] == $un && $info['PASSWORD'] == $pw) {
# We have a match redirect the user.
$_SESSION['LOGGED_IN'] = TRUE;
$_SESSION['LOGIN_ATTEMPTS'] = 0;
$_SESSION['USERNAME'] = $info['USERNAME'];
$_SESSION['EMAIL'] = $info['EMAIL'];
header('Location: ' . $info['LOCATION']);
return;
}
}
}
}
echo '<h2 class=\'error\'>Incorrect username and or password,try again!</h2>';
self::attempts(true);
}
/**
* Forgot password? not a problem call this method with the correct username
* and the user will be sent a password reminder. Please note that not of these passwords
* are hashed meaning this is not a good idea to store personal information behind this script!
* @param <string> The users email address.
* @return <bool> Returns true upon success.
*/
public function forgot($email) {
for ($i=0;$i<count($this->_users);$i++) {
if (array_key_exists('EMAIL',$this->_users[$i])) {
if ($this->_users[$i]['EMAIL'] == $email)
$info = $this->_users[$i];
} else return false;
}
if (isset($info) && is_array($info)) {
# Send the user their password
$to = $info['EMAIL'];
$subject = 'You recently forgot your password | ' . self::$_script_name;
$message = 'Hi ' . $info['USERNAME'] . ',' . "\n\n";
$message .= 'You recently requested your password for ' . self::$_script_name . ' if you didn\'t not to worry just ignore this ';
$message .= 'email. Anyway you can find your email below,should you require anymore assistance then please contact us ';
$message .= 'at ' . self::$_admin_email . ".\n\n";
$message .= 'Username: ' . $info['USERNAME'] . "\n";
$message .= 'Password: ' . $info['PASSWORD'];
$message .= "\n\n" . 'Best Regards,' . "\n" . self::$_admin_name;
$headers = 'From: ' . self::$_admin_email . "\r\n" .
'Reply-To: ' . self::$_admin_email . "\r\n" .
'X-Mailer: PHP/' . PHPversion();
# Uncomment for final version
if (mail($to,$subject,$message,$headers)) return true;
}
}
/**
* The secure method,simply call this to lock any page down it's as simple as that.
* @param <string> Name of the script EG: John's Script
* @param <string> Email of the administrator EG: john@suburbanarctic.com
* @param <string> Admin name EG: John Crossley
* @return <object> Returns an instanciated object of this class.
*/
public static function secure($s_name = '',$a_email = '',$a_name = '') {
self::$_script_name = $s_name;
self::$_admin_email = $a_email;
self::$_admin_name = $a_name;
if (!self::$_init instanceof JC_fsl) {
self::$_init = new JC_fsl();
}
return self::$_init;
}
}
# You may edit me
$secure = JC_fsl::secure();
##########################################################################
########################## YOUR EDITING BLOCK ###########################
$secure->add('mbhaynes','mbhaynes13','seth@procstaff.com','mbhaynes.PHP');
$secure->add('emory','emory13','emory.PHP');
$secure->add('ehg','ehg13','redirect.html');
$secure->add('dhgriffin','dhgriffin13','dhgriffin.PHP');
$secure->add('neo','neo13','neo.PHP');
$secure->add('first','first13','first.PHP');
$secure->add('test','test','test.PHP');
##########################################################################
##########################################################################
############ FORM PROCESSING ############
if (isset($_POST['username']) && isset($_POST['password'])) {
$secure->validate($_POST['username'],$_POST['password']);
}
if (isset($_GET['logout'])) $secure->logout();
if (isset($_POST['forgot_password_button']) && isset($_POST['email'])) {
// We need to send the user their password.
if ($secure->forgot($_POST['email'])) {
echo '<h2 class=\'success\'>Your password has been sent to your email address!</h2>';
} else {
echo '<h2 class=\'error\'>I\'m sorry but that email address has no record on this site.</h2>';
}
}
?>
<?PHP if(!isset($_SESSION['LOGGED_IN'])): ?>
<style type='text/css'>
#fslv2-main{
font-family:HelveticaNeue-Light,"Helvetica Neue Light","Helvetica Neue",Helvetica,Arial,"Lucida Grande",sans-serif;font-weight:300;font-size:14px;line-height:1.6;
margin-left:auto;
margin-right:auto;
width: 300px;
padding: 10px 10px 10px 10px;
}
fieldset { border: none; margin: 0; padding: 0;}
.fslv2 .input {
border: 1px solid #b9b9b9;
padding: 5px;
width: 225px;
outline: none;
font-size: 13px;
}
.fslv2 label {
float: left;
width: 72px;
line-height: 28px;
}
h3 { font-weight: normal; }
a { color: #4a6a81; text-decoration: none; }
a:hover { color: #4a6a81; text-decoration: underline; }
.button {
border: 1px solid #233d4f;
border-bottom: 1px solid #233d4f;
background-color: #4a6a81;
border-radius: 2px;
padding: 6px 5px;
color: #ffffff;
text-shadow: 0 1px rgba(0,0.1);
margin-left:auto;
margin-right:auto;
top: 5px;
width: 100px;
min-width: 100px;
cursor: pointer;
font-size: 13px;
Box-shadow: rgba(0,0.2);
-webkit-Box-shadow: rgba(0,0.2);
-moz-Box-shadow: rgba(0,0.2);
}
.input:focus {
-moz-Box-shadow: inset 0 0 3px #bbb;
-webkit-Box-shadow: inset 0 0 3px #bbb;
Box-shadow: inner 0 0 3px #bbb;
}
.fsl p.la { text-align: center; }
.success {
margin: 2em auto 1em auto;
border: 1px solid #337f09;
padding: 5px;
background-color: #dd4b39;
width: 400px;
text-align: center;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;
font-weight: normal;
font-family:HelveticaNeue-Light,sans-serif;font-weight:300;font-size:14px;line-height:1.6;
}
.error {
margin: 2em auto 1em auto;
border: 1px solid #233d4f;
padding: 5px;
background-color: #8bafc5;
width: 400px;
text-align: center;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;
font-weight: normal;
font-family:HelveticaNeue-Light,sans-serif;font-weight:300;font-size:14px;line-height:1.6;
}
</style>
<div id="fslv2-main">
<?PHP if($secure->attempts() > 5): ?>
<!-- Show the login form -->
<p>Too many Failed attempts,please try again later.</p>
<?PHP elseif(isset($_GET['forgot_password'])): ?>
<fieldset>
<form method="post" action="#">
<p>
<label for='email'>Email: </label>
<input type='text' name='email'/>
</p>
<p><input type='submit' name='forgot_password_button'value='Send!' /></p>
</form>
</fieldset>
<small><a href="index.html">Cancel</a></small>
<?PHP else: ?>
<fieldset>
<legend><?PHP echo $secure->site_name(); ?></legend>
<form method="post" action="#">
<p>
<label for='username'>Username: </label>
<input type='text' name='username'/>
</p>
<p>
<label for='password'>Password: </label>
<input type='password' name='password'/>
</p>
<p><input type='submit' name='login'value='Login' /></p>
</form>
</fieldset>
<?PHP endif; ?>
</div><!-- #fslv2-main -->
<?PHP exit(); endif; ?>
解决方法
如果您在登录后返回主页面,请尝试刷新页面,如果会话设置正确,那么刷新后您将自动登录或显示已登录状态,否则会有一些东西会破坏所有主页中的会话？我会选择第一个条件,因为这发生在我身上很多次,最好在同一页面上显示logIn表单,在那里你要显示注册用户的内容,登录后快速将它们重定向到同一页面,这样所有会话工作正常,当您将它们重定向到同一页面时,后退按钮不会产生问题….
编辑：
它不会影响具有单独页面的用户,因为整个登录表单将在登录后由该用户内容更改.
试试这个：
if(isset($_SESSION['LOGGED_IN'])){
//User is logged-In check for existence of its name file,$user = $_SESSION["LOGGED_IN"]."PHP";
If(file_exists($user)){
//User's named file exists Now include it.
include("yourfolder/$user");
}else{
//He was loggedIn in but file wasn't found...
echo"Sorry nothing for you :P";
}
}else{
//Show the logIn form
}
darkest of days php中session_unset与session_destroy的区别分析
session_unset()
释放当前在内存中已经创建的所有$_SESSION变量，但不删除session文件以及不释放对应的session
id
session_destroy()
删除当前用户对应的session文件以及释放session
id，内存中的$_SESSION变量内容依然保留
因此，释放用户的session所有资源，需要顺序执行如下代码：
复制代码 代码如下:
$_SESSION[''user''] = ''lowell'';
session_unset();
session_destroy();
?>
以上就介绍了darkest of days php中session_unset与session_destroy的区别分析，包括了darkest of days方面的内容，希望对PHP教程有兴趣的朋友有所帮助。
PHP session destroyed / lost after header
在header重定向后，注册的session居然消失了？！ 找到解决办法： After the Header redirect you need to exit the PHP script: header(Location: /); exit(); 参考：http://stackoverflow.com/questions/2037316/php-session-destroyed-lost-after-header
在header重定向后，注册的session居然消失了？！
找到解决办法：
After the Header redirect you need to exit the PHP script:
header("Location: /");
exit();登录后复制
参考：http://stackoverflow.com/questions/2037316/php-session-destroyed-lost-after-header
php session_decode函数只要解码的功能，不想存入$_SESSION里头
php session_decode函数只要解码的功能，不想存入$_session里头
回复内容：
php session_decode函数只要解码的功能，不想存入$_session里头
PHP SESSION_destroy 和 SESSION_unset
如何解决PHP SESSION_destroy 和 SESSION_unset？
ses.PHP
<?PHP
session_start();
$_SESSION["favclor"] = "green";
$_SESSION["favanimal"] = "cat";
?>
<!DOCTYPE html>
<html>
<body>
<?PHP
echo "Sesion variables set <br>";
echo "Favourite color is ".$_SESSION["favclor"]."<br> ";
echo "favourite animal is ".$_SESSION["favanimal"];
?>
</body>
</html>
销毁.PHP
<?PHP
session_start();
session_destroy();
echo "session is destroyed";
?>
当我运行代码时，session_destroy() 不起作用。 session_destroy() 销毁创建的会话后，我仍然可以看到创建的会话变量及其值。
解决方法
暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！
如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。
小编邮箱:dio#foxmail.com (将#修改为@）
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