PHP not creating $_SESSION variable on session_start();_问答_开发者

PHP not creating $_SESSION variable on session_start();

开发者 https://www.devze.com 2023-03-29 13:30 出处：网络

I have 3 pages in my set up here: login.php: The login page that contains the username and password fields which submits to

相关专题：php session

I have 3 pages in my set up here:

checklogin.php: Which checks to see if the credentials are right which redirects to

login_successful.php: Which displays the user's name

<?php session_start(); ?>

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

<head>
    <?php
        include 'content.php';
        echo $head;
    ?>
</head>

Which should initialize a global $_SESSION variable right?

checklogin.php has some code which looks like this:

if (mysql_num_rows($result) < 1)
{
    /* Access denied开发者_运维百科 */
    echo 'Sorry, your username or password was incorrect!';
}
else
{
    $_SESSION['username'] = $username;

    /* Log user in */
    header("location:login_successful.php");
}

login_successful.php looks like this:

<div id="title" style="margin:5px">
    <h2>Welcome back <?php echo $_SESSION['username']; ?>!</p>
</div>

Unfortunately when I go through the login procedure and get to login_successful.php, I get this error "Notice: Undefined variable: _SESSION in C:\wamp\www\login_successful.php on line 15" even though I clearly started a session in login.php.

Why is it doing this?

You need to call session_start() at the top of each of your scripts

You need to remember session_start() in checklogin.php