php 和会话重定向错误

Question

我正在创建一个登录表单并使用会话注销，但是当我尝试登录浏览器时显示错误（我认为错误在记录的函数中） 任何人都可以帮助我，因为它让我发疯...... **页面未正确重定向 Firefox 认为服务器正在以一种永远不会检测到完成的方式重定向对该地址的请求。

此问题有时可能是由于禁用或拒绝接受 饼干。**

login.php

<?php
ob_start();
require_once('functions.php');


if(loggedin()){
    header("Location: userarea.php");
    exit();
}


if(isset($_POST['login'])){

  //get data
  $username = $_POST['username'];
  $password = $_POST['password'];
  $rememberme = $_POST['rememberme'];

  if($username && $password){

   $login = mysql_query("SELECT * FROM rememberme  WHERE username = '$username'");
   while($row = mysql_fetch_assoc($login)){

      $db_password = $row['password'];
      if($password == $db_password)
       $loginok = TRUE;
      else
        $loginok = FALSE;
      if($loginok == TRUE){

         if($rememberme == "on"){
          setcookie("username", $username, time()+7200);



         }else if($rememberme == "")
           $_SESSION['username'] = $username;
         header("Location: userarea.php");
         exit();   


      }else{
       die("incorrect username/password combination");

      }

   }



  }else
    die("please enter a username and password");
    exit();


}


?>

<form action="login.php" method="post">
<p>Username<br />
  <input type="text" name="username" />
</p>
<p> Password<br />
  <input type="password" name="password" />
</p>
<p>
  <input type="checkbox" name="rememberme"> 
  Remember me<br />

  <input type="submit" name="login" value="Log in" />
</p>
</form>
<?php ob_flush(); ?>

函数.php

 <?php
 //session
 session_start();
 // connect to database 
 mysql_connect("localhost", "root", "") or die("could not connect to database");
 mysql_select_db("rememberme") or die("could not select database");

// login check function

 function loggedin()
{
    $loggedin = false;
    if(isset($_SESSION['username'])||isset($_COOKIE['username']))
    {
        $loggedin = TRUE;
    }
    return $loggedin;
}

?>

userarea.php

<?php
 //session
 session_start();
 // connect to database 
 mysql_connect("localhost", "root", "") or die("could not connect to database");
 mysql_select_db("rememberme") or die("could not select database");

// login check function

function loggedin()
{

  if(isset($_SESSION['username'])||isset($_COOKIE['username'])){
    $loggedin = TRUE;
    return $loggedin;  


  }



}

?>

Answer 1

您在两个文件中具有相同的功能。

function loggedin()

试试

function loggedin()
{
    $loggedin = false;
    if(isset($_SESSION['username'])||isset($_COOKIE['username']))
    {
        $loggedin = TRUE;
    }
    return $loggedin;
}

如果你if条件不满足你的函数将不会返回真或假，所以你需要将initial的值设置为false然后覆盖如果if condition 满意。

Login.php

<?php
require_once('functions.php');

if(isset($_POST['login']))
{
    $username = $_POST['username'];
    $password = $_POST['password'];
    $rememberme = $_POST['rememberme'];

    if($username && $password)
    {
        $login = mysql_query("SELECT * FROM rememberme WHERE username = '".$username."'");
        while($row = mysql_fetch_assoc($login))
        {
            $db_password = $row['password'];
            if($password == $db_password)
                $loginok = TRUE;
            else
                $loginok = FALSE;
            if($loginok == TRUE)
            {
                if($rememberme == "on")
                {
                    setcookie("username", $username, time()+7200);
                }
                else if($rememberme == "")
                {
                    $_SESSION['username'] = $username;
                    header("Location: userarea.php");
                    exit();   
                }
            }
            else
            {
                die("incorrect username/password combination");
            }

        }
    }
    else
    {
        die("please enter a username and password");
        exit();
    }
}
?>

<form action="login.php" method="post">
    <p>Username<br />
        <input type="text" name="username" />
    </p>
    <p>Password<br />
        <input type="password" name="password" />
    </p>
    <p>
        <input type="checkbox" name="rememberme"> 
        Remember me<br />
        <input type="submit" name="login" value="Log in" />
    </p>
</form>
<?php ob_flush(); ?>

functions.php

<?php
ob_start();
session_start();
error_reporting(E_ALL);
ini_set('display_errors','On');

mysql_connect("localhost", "root", "") or die("could not connect to database");
mysql_select_db("rememberme") or die("could not select database");

// login check function

if(loggedin())
{
    header("Location: userarea.php");
    exit();
}

function loggedin()
{
    $loggedin = false;
    if(isset($_SESSION['username'])||isset($_COOKIE['username']))
    {
        $loggedin = TRUE;
    }
    return $loggedin;
}

?>

userarea.php

<?php
    require_once "functions.php";
    echo "after login";
?>