我什么时候应该在PHP中启动并销毁会话

时间:2012-08-02 21:44:09

标签: php session oauth

我正在创建一个简单的oauth网站。

index.php

<?php
session_start();
if (empty($_SESSION['authentication']))
    $_SESSION['authentication'] = 'pending';
?>
<html>
<form action="oauth.php" method="post">
    <span>
    <?php
        echo $_SESSION['authentication'];
    ?>
    </span>
    <input type="hidden" name="action" value="authenticate">
    <input type="submit" value="authenticate">
</form>
</html>

oauth.php

<?php
session_start();
if (isset($_POST['action']) and $_POST['action'] == 'authenticate') {
    $url = $serverAuth ... ;
    header('Location: ' . $url); //google oauth, it will come back to oauth.php
    exit();
}

if (isset($_GET['code'])) {
    $ch = curl_init($serverToken);
    $result = curl_exec($ch);
    $tokens = json_decode($result, true);

    if (isset($tokens['access_token'])) {
        $_SESSION['authentication'] = 'good';
        $_SESSION['access_token'] = $tokens['access_token'];
    } else {
        $_SESSION['authentication'] = 'error';
    }

    header('Location: ./');
    exit();
}

if (isset($_GET['error'])) {
    if ($_GET['error'] == 'access_denied')
        $_SESSION['authentication'] = 'denied';
    else
        $_SESSION['authentication'] = 'error';
    header('Location: ./');
    exit();    
}
?>

我想让网站像:默认情况下,$_SESSION['authentication']是“待定”;当我刷新页面时,每个会话变量都消失了,$_SESSION['authentication']重置为默认值。但我无法在$_SESSION开头重置index.php,因为oauth.php中的功能会header()重定向到此页面。

如何处理?

1 个答案:

答案 0 :(得分:0)

您必须在需要访问$_SESSION 的每个网页上开始会话。仅在明确请求时销毁它,例如注销。