例如：

的index.PHP

<?PHP
session_start();

if (isset($_POST['username'],$_POST['password']) {
    $_SESSION['username'] = $_POST['username'];
    $_SESSION['password'] = $_POST['password'];
    echo '<a href="nextpage.PHP">Click to continue.</a>';
} else {
    // form
}
?>

nextpage.PHP

<?PHP
session_start();

if (isset($_SESSION['username'])) {
    echo $_SESSION['username'];
} else {
    header('Location: index.PHP');
}
?>

但是,我可能会在会话中存储像用户ID一样更安全的东西,而不是用户的登录凭据.