尝试为文件系统目录工作添加一些额外的元素到我的会话变量中，我注意到我无法添加一些。这是我所拥有的：
<?php
#login.php
// This page processes the login form submission.
// Upon successful login, the user is redirected.
// Two included files are necessary.
// Check if the form has been submitted:
if(isset($_POST['submitted']))
{
// For processing the login:
require_once ('login_functions.php');
// Need the database connection:
require_once ('../mysqli_connect.php');
// Check the login:
list ($check, $data) = check_login($dbc, $_POST['email'], $_POST['pass']);
if ($check) //OK!
{
// set the session data:
session_start();
$_SESSION['user_id'] = $data['user_id'];
$_SESSION['first_name'] = $data['first_name'];
$_SESSION['company_name'] = $data['company_name'];
$_SESSION['email'] = $data['email'];
// Store the HTTP_USER_AGENT:
$_SESSION['agent'] = md5($_SERVER['HTTP_USER_AGENT']);
//Redirect:
$url = absolute_url ('loggedin.php');
header("Location: $url");
exit(); // Quit the script.
}
else // Unsuccessful!
{
// Assign $data to $errors for error reporting
// in the login_functions.php file.
$errors = $data;
}
mysqli_close($dbc); // Close the database connection
} //End of the main submit conditional
//Create the page:
include('login_page_inc.php');
?>
以下是登录功能：
<?php #login_functions.php
//This page defines two functions used by the login/logout process.
/*This function determines and returns an absolute URL.
* It takes one argument: the page that concludes the URL.
* The argument defaults to index.php
*/
function absolute_url ($page = 'about.php')
{
//Start defining the URL...
//URL is http:// plus the host name plus the current directory:
$url = 'http://' . $_SERVER['HTTP_HOST'] . dirname($_SERVER['PHP_SELF']);
// Remove any trailing slashes:
$url = rtrim($url, '/\\');
// Add the page:
$url .= '/' . $page;
// Return the URL:
return $url;
}//End of absolute_url() function.
/*This function validates the form data (email address and password).
* If both are present, the database is queried.
* The function requires a database connection
* The function returns an array of information, including:
* - a TRUE/FALSE variable indicating success
* - an array of either errors or the database result
*/
function check_login($dbc, $email = '', $pass = '')
{
$errors = array(); // Initialize error array.
// Validate the email address:
if (empty($email))
{
$errors[] = 'You forgot to enter your email address.';
}
else
{
$e = mysqli_real_escape_string($dbc, trim($email));
}
// Validate the password:
if (empty($pass))
{
$errors[] = 'You forgot to enter your password.';
}
else
{
$p = mysqli_real_escape_string($dbc, trim($pass));
}
if(empty($errors)) //If everything's OK.
{
// Retrieve the user_id and first_name for that email/password combo
$q = "SELECT user_id, first_name, email FROM
user WHERE email='$e' AND pass=SHA1('$p')";
$r = @mysqli_query ($dbc, $q); // Run the query.
//Check the result:
if (mysqli_num_rows($r)==1)
{
//Fetch the record:
$row = mysqli_fetch_array($r, MYSQLI_ASSOC);
// Return true and the record:
return array (true, $row);
}
else //Not a match for writer, check the publisher table
{
$q = "SELECT pub_id, company_name, cemail FROM
pub WHERE cemail='$e' AND password=SHA1('$p')";
$r = @mysqli_query ($dbc, $q);
if (mysqli_num_rows($r)==1)
{
//Fetch the record:
$row = mysqli_fetch_array($r, MYSQLI_ASSOC);
// Return true and the record:
return array (true, $row);
}
else
{
echo '<p>Invalid Credentials</p>';
}
}
} // End of empty($errors) IF.
// Return false and the errors:
return array(false, $errors);
} // End of check_login() function.
?>
注意：$_SESSION['first_name'] 和 $_SESSION['company_name'] 一直正常工作，但是添加电子邮件和 user_id 不起作用。提前致谢。