javascript - 登录后页面刷新？

Question

我想让我的页面在登录后刷新，这是我的 index.php 的格式

<?php
if(!empty($_SESSION['LoggedIn']) && !empty($_SESSION['Username']))
{
    // let the user access the main page  
    // i have made the main content with jquery mobile framework 
}
elseif(!empty($_POST['username']) && !empty($_POST['password']))
{
    // let the user login
       include "login.php";

}
else
{
    // display the login form
<form method="post" action="index.php" name="loginform" id="loginform">
            <fieldset>
                <label for="username">Username:</label><input type="text" name="username" id="username" /><br />
                <label for="password">Password:</label><input type="password" name="password" id="password" /><br />
                <input type="submit" name="login" id="login" value="Login" />
            </fieldset>
            </form>

在我的 login.php 里面

<?php

    $username = mysql_real_escape_string($_POST['username']);
    $password = mysql_real_escape_string($_POST['password']);

    $checklogin = mysql_query("SELECT * FROM users WHERE Username = '".$username."' AND Password = '".$password."'");

    if(mysql_num_rows($checklogin) == 1)
    {
        $row = mysql_fetch_array($checklogin);
        $email = $row['email'];
        $uid = $row['u_id'];

        $_SESSION['Username'] = $username;
        $_SESSION['EmailAddress'] = $email;
        $_SESSION['LoggedIn'] = 1;
        $_SESSION['uid'] = $uid;
        $flag=1;

    header("Location: http://5aday.dihops.net/index.php");
//        echo "<meta http-equiv=\"refresh\" content=\"0;index.php\">";
//header("Refresh: 2; url=http://5aday.dihops.net/index.php");
    // THIS IS WHERE I AM STUCK 
      }
    else
    {
        echo "<h1>Error</h1>";
        echo "<p>Sorry, your account could not be found. Please <a href=\"index.php\">click here to try again</a>.</p>";
    }
?>
    }
    ?>

我不知道我做错了什么。但是一旦用户提供了他的用户名和密码并提交......我得到一个空白页面。并且用户必须手动刷新网页才能看到网页内容。

Answer 1

根据 the link提到 header(location) 必须放在页面的顶部......所以我重新安排了 if 条件......

我在 index.php 的顶部添加了这个

if(!empty($_POST['username']) && !empty($_POST['password']))
{
   include "login.php";


} ?>

然后在正文中我添加了其他 if 语句

if(!empty($_SESSION['LoggedIn']) && !empty($_SESSION['Username']))
{
    // let the user access the main page  
    // i have made the main content with jquery mobile framework 
}else 
else
{
    // display the login form
<form method="post" action="index.php" name="loginform" id="loginform">
            <fieldset>
                <label for="username">Username:</label><input type="text" name="username" id="username" /><br />
                <label for="password">Password:</label><input type="password" name="password" id="password" /><br />
                <input type="submit" name="login" id="login" value="Login" />
            </fieldset>
            </form>
}

这已经解决了问题。