Question

所以我的php登录脚本有一个愚蠢的问题。我注意到当我尝试使用它并登录时在login.php上设置会话变量但是当我尝试移动页面时它会破坏它。所以在login.php上我检查是否有用户名和密码与数据库行匹配，如果匹配则设置一个变量告诉用户登录用户。然后检查站点旁边的变量，如果它被设置我让他们查看网站的内侧如果没有设置我踢他们。

所以这是我的login.php

      <?php
  include 'functions/functions.php';
$db = mysqlconnect();?>
  <?php
error_reporting(0); 
session_start();
?><?php 
           if (isset($_POST["Submit"])) {



    $password = mysql_real_escape_string($_POST['password']);
    $password2 = strip_tags($password);
    $md5password = md5($password2);


    $statement = $db->prepare("SELECT * FROM users WHERE username = ? AND password = ? ");
    $statement->execute(array($_POST['username'],$md5password));
    $count = $statement->rowCount();

    /// If usernam and password match we carry on
    if ($count == "1")
      {

    $username23 = mysql_real_escape_string($_POST['username']);
    $thereusername = strip_tags($username23);



         $_SESSION['username'] = $thereusername ; 




         echo "You are now being logged in";



    //Test if it is a shared client
    if (!empty($_SERVER['HTTP_CLIENT_IP'])){
      $ip=$_SERVER['HTTP_CLIENT_IP'];
    //Is it a proxy address
    }elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
      $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
    }else{
      $ip=$_SERVER['REMOTE_ADDR'];
    }



    $result5534453465 = mysql_query("UPDATE users SET lastip='".$ip."' WHERE username='".$_SESSION['username']."'") 
    or die(mysql_error());  

    mysql_query("INSERT INTO user_log (username, ip)
    VALUES ('".$_SESSION['username']."', '".$ip."')");






      echo '<META HTTP-EQUIV="Refresh" Content="0; URL=home.php">';    
        exit;




      }else{
        echo "Password or username is wrong";  

      }
    }
           ?>
    <form name="input" action="" method="post">
      <p>Username:</p>
      <p>
      <input type="text" name="username" id ="username">
      </p>
      <p>Password:  </p>
      <p>
        <input type="password" name="password" id = "password">
      </p>
      <p>
        <input type="submit" value="Submit" name = "Submit">
      </p>
    </form>

我已经尝试回应$ _SESSION ['用户名']，因为用户被重定向到网站并且回声正确，因此设置正确....

然后在网站的内侧，我检查是否正在设置$ _SESSION ['用户名']

ini_set('session.cookie_httponly',true);
    session_start();

    if(isset($_SESSION['last_ip']) == false){
    $_SESSION['last_ip'] = $_SERVER['REMOTE_ADDR'];
    }

    if ($_SESSION['last_ip'] !== $_SERVER['REMOTE_ADDR']){

    session_unset();
    session_destroy();

    }

    if(empty($_SESSION['username'])){


    echo '<META HTTP-EQUIV="Refresh" Content="0; URL=login.php">';    
    exit;


}

由于某种原因，该页面说用户名是空的...有趣的是，如果我注销破坏整个会话然后尝试登录它将工作....

编辑：我刚刚编辑了这段代码

//Test if it is a shared client
    if (!empty($_SERVER['HTTP_CLIENT_IP'])){
      $ip=$_SERVER['HTTP_CLIENT_IP'];
    //Is it a proxy address
    }elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
      $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
    }else{
      $ip=$_SERVER['REMOTE_ADDR'];
    }

要

//Test if it is a shared client
if (!empty($_SERVER['HTTP_CLIENT_IP'])){
  $_SESSION['last_ip']=$_SERVER['HTTP_CLIENT_IP'];
//Is it a proxy address
}elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
  $_SESSION['last_ip']=$_SERVER['HTTP_X_FORWARDED_FOR'];
}else{
 $_SESSION['last_ip']=$_SERVER['REMOTE_ADDR'];
}

现在一切似乎都有效......我在猜测

 if(isset($_SESSION['last_ip']) == false){
$_SESSION['last_ip'] = $_SERVER['REMOTE_ADDR'];
}

if ($_SESSION['last_ip'] !== $_SERVER['REMOTE_ADDR']){

session_unset();
session_destroy();

}

杀了会议？

另一个编辑：我刚刚注意到上述编码之后，登录现在适用于firefox而不是chrome，会话变量在登录后移动到不同的页面后没有在chrome中设置。我想也许是主机问题？我使用的是PHP 5.2版本，我已升级到5.3但仍有问题...

侧面php.in

中的

会话设置

ssion
Session Support     enabled
Registered save handlers    files user sqlite
Registered serializer handlers  php php_binary wddx

Directive   Local Value Master Value
session.auto_start  Off Off
session.bug_compat_42   Off Off
session.bug_compat_warn On  On
session.cache_expire    180 180
session.cache_limiter   nocache nocache
session.cookie_domain   no value    no value
session.cookie_httponly On  Off
session.cookie_lifetime 0   0
session.cookie_path /   /
session.cookie_secure   Off Off
session.entropy_file    no value    no value
session.entropy_length  0   0
session.gc_divisor  100 100
session.gc_maxlifetime  1440    1440
session.gc_probability  1   1
session.hash_bits_per_character 5   5
session.hash_function   0   0
session.name    PHPSESSID   PHPSESSID
session.referer_check   no value    no value
session.save_handler    files   files
session.save_path   no value    no value
session.serialize_handler   php php
session.use_cookies On  On
session.use_only_cookies    Off Off
session.use_trans_sid   0   0

Answer 1

在初始化会话之前，您的脚本不应打印任何内容，甚至不能打印单个空格或换行符。

      <?php  // whitespaces at the beginning
  include 'functions/functions.php';
$db = mysqlconnect();?> // linebreak + spaces between the closing tag and the following opening tag
  <?php
error_reporting(0); 
session_start();

另请检查您的functions.php文件。 Per php.net：“如果文件是纯PHP代码，最好省略文件末尾的PHP结束标记。这可以防止在PHP结束标记之后添加意外的空格或新行，这可能会导致不需要的效果，因为当程序员无意在脚本中发送任何输出时，PHP将启动输出缓冲。“

Answer 2

在ini_set函数的开头，您需要将$ _SESSION声明为GLOBAL变量。

EG：

function ini_set() {
    GLOBAL $_SESSION ;
...

会话未被保存

2 个答案: