$ _SESSION不存储值

时间:2014-11-08 18:19:30

标签: php session

我遇到存储$ _SESSION变量的问题,我在PHP方面有点新,我喜欢它在当前的知识范围内。

首先我的信条:

Win 7 Pro 64 PHP 5 远程服务器(不确定其配置)

所以我要做的是设置一个登录页面,其中包含用于测试目的的硬编码用户名和密码。

我想在后续页面上显示用户名以进行确认。

的login.php

<?php session_start();?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head >
<title>Login</title>

<link rel="stylesheet" href="style.css" type="text/css" media="screen" />
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<meta http-equiv="content-language" content="en-gb" />

<script type="text/javascript">
    // Perform Client side validation of Username and Password
    function redirect() {
        var username = document.getElementById("username");
        var password = (document.getElementById("password"));

        if (!username.value == " ") {
             if (!password.value == " ") {
                if (username.value == "aknight") {
                    if (password.value == "00226291") {
                        window.location = "Home.php";
                        exit();
                    } else
                        alert("Username or Password Invalid");
                }
            } else
                alert("Password is required");
        } else
            alert("Username is required");
    }
</script>
</head>

<body>
<div id="header">
<h1>Product Order System</h1>
<br/>
<h2>The most expensive crap youll ever find...</h2>
</div>

<div id="content">
<?php

if ($_SERVER['REQUEST_METHOD'] == 'POST'){

$_SESSION['username'] = $_POST['username'];

}else{
?>

<form action="" method="POST">
<fieldset>
<legend>Login Information</legend>
<p>
<label for="Username">Username:</label>
<input type="text" name="username" id="username" />
</p>
<p>
<label for="Password">Password:</label>
<input type="password" name="password" id="password" />
</p>
<p>
<input type="button" name="login" value="Login" onclick="redirect();"/>
<input type="button" name="cancel" value="Cancel" />
</fieldset>
</form>
<?php }

    include ('includes/footer.html');
?>

home.php

<?php
session_start();
$page_title = 'Home';
include ('includes/header.php');
if(isset($_SESSION['username'])) { $name = $_SESSION['username'];}else{echo "<p>error</p>";}
echo "<h3>Welcome ".$name."!</h3>" ;
?>

我已尝试打印出$_SESSION值,但它们是空的。

产生这个结果

<?php
   echo "<pre>".print_r($_SESSION)."</pre>";
?>

Array {
    [username] => 
}

请不要介意JS,这是学前班客户验证只是为了向前推进。

非常感谢任何帮助。

3 个答案:

答案 0 :(得分:0)

为您的登录表单命名,然后在您的JavaScript验证函数中,而不是window.location,执行document.forms ['yourformname']。submit()。

答案 1 :(得分:0)

我认为您的Javascript验证实际上是导致问题的原因。 您正在使用POST请求在Login.php中设置会话变量,但实际上没有POST发送到Login.php,因为一旦表单被认为有效,您的Javascript就会重定向到Home.php。您需要在流程中的某个时刻提交表单,因此您实际上会获得一些POST值,您将使用这些值来填充SESSION变量。 如果你想保持你的Javascript验证,可以查看submit():http://www.w3schools.com/jsref/met_form_submit.asp 在提交表单之前,您必须在表单上设置正确的操作属性。

答案 2 :(得分:0)

所以这是一个似乎正在起作用的修复

<?php session_start();?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head >
<title>Login</title>

<link rel="stylesheet" href="style.css" type="text/css" media="screen" />
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<meta http-equiv="content-language" content="en-gb" />

<script type="text/javascript">
    // Perform Client side validation of Username and Password
    function redirect() {
        var username = document.getElementById("username");
        var password = (document.getElementById("password"));

        if (!username.value == " ") {
            if (!password.value == " ") {
                if (username.value == "aknight") {
                    if (password.value == "00226291") {
                        document.forms[0].submit();
                        exit();
                    } else
                        alert("Username or Password Invalid");

                }
            } else
                alert("Password is required");

        } else
            alert("Username is required");

    }
</script>
</head>

<body>
<div id="header">
<h1>Product Order System</h1>
<br/>
<h2>The most expensive crap youll ever find...</h2>
</div>

<div id="content">
<?php

if ($_SERVER['REQUEST_METHOD'] == 'POST'){

    $_SESSION['username'] = $_POST['username'];
    header('Location : ../Home.php');

}else{
?>

<form action="Home.php" name="login" method="POST">
<fieldset>
<legend>Login Information</legend>
<p>
<label for="Username">Username:</label>
<input type="text" name="username" id="username" />
</p>
<p>
<label for="Password">Password:</label>
<input type="password" name="password" id="password" />
</p>
<p>
<input type="button" name="login" value="Login" onclick=" redirect();"/>
<input type="button" name="cancel" value="Cancel" />
</fieldset>
</form>
<?php }

    include ('includes/footer.html');
?>

如果nex系列网页有类似问题,将再次发布

由于