问PHP会话帮助

EN

<?php session_start(); ?>

<?php $_SESSION['username'] = 'Roel Veldhuizen'; ?>

<?php echo $_SESSION['username'];?>

session_start();
$_session['name'] = $_POST['name'];
header('location: nextpage.php');

session_start();
echo 'Your name is: '.$_SESSION['name'];

<form name="submitName" action="saveName.php" method="POST">
    Name: <input type="text" name="usersName" /><br>
    <input type="submit" value="Continue" />
</form>

<?php
    session_start(); // Starts the session so you can save the name
    $name = $_POST['usersName']; // Get the name submitted
    $_SESSION['name'] = $name; // Save the name in a session
    echo strip_tags($name); // Output the user's name to the HTML page, after removing PHP and HTML tags from string
?>

<?php
    session_start();
    if(isset($_SESSION['name'])) {
        echo $_SESSION['name'];
    }
    else {
        echo <<<USERFORM
<form name="submitName" action="saveName.php" method="POST">
    Please enter your name: <input type="text" name="usersName" /><br>
    <input type="submit" value="Continue" />
</form>
USERFORM;
    }
?>