如何通过PHP跟踪登录状态？

Question

如何通过PHP跟踪登录状态？

我在每个页面中都包含以下页面以检查登录状态.我尝试通过cookie登录后识别用户.但是,我还没有设法读取我的login_cookie或以任何方式使用它.

代码handle_login_status.php我操纵登录状态

<?php

    $dbconn = pg_connect("host=localhost port=5432 dbname=masi user=masi password=123");

    //1. read the first word in Cookie of the form 
        //"email@gmail.com,ca05106e445c15197f7213bc12648524
    //Then, store this word to $email 
    $cookie_tripped = explode(",", $_COOKIE['login_cookie']);   
    $email = $cookie_tripped[0];
    $result = pg_prepare($dbconn, "query1", 'SELECT passhash_md5 FROM users 
                         WHERE email = $1;');
    $result = pg_execute($dbconn, "query1", array($email));
    if(!$result) {
        exit;
    }

    // to take the passhash out of the cookie
    $passhash_md5_cookie = $cookie_tripped[1];
    if($result == $passhash_md5_cookie) {
        $result = pg_prepare($dbconn, "query7", "UPDATE users SET logged_in = $1
            WHERE email = $2;");
        $result = pg_execute($dbconn, "query7", array("true", $email));
        $logged_in = true;
    }
    else {
        $result = pg_execute($dbconn, "query7", array("false", $email));
        $logged_in = false;
    }

我在登录表单的处理程序中设置了cookie.

login_cookie的声明在 handle_login_form.php

global $login_cookie;
$login_cookie = $_POST['email'] . ',' . md5($_POST['password']);

$result = pg_prepare($dbconn, "query3", 'SELECT passhash_md5 
    FROM users WHERE email = $1;');
$result = pg_execute($dbconn, "query3", array($_POST['email']));

while ($row = pg_fetch_row($result)) {
    $password_original = $row[0];
}

$login_cookie_original = $_POST['email'] . ',' . md5($password_original);

if ( $login_cookie_original == $login_cookie )
{   
    setcookie("login_cookie", $login_cookie);
    header("Location: /codes/index.php?ask_question");
    die("logged in");
} 

Answer 1

你甚至没有给我们足够的信息来正确调试......

• 在哪里$login_cookie_original定义？
• 在哪里$login_cookie定义？

没有这些信息,我们无法正确调试您的代码.您可以setcookie()正确使用来设置cookie,然后使用该$_COOKIE变量来读取它.

会话将是处理登录情况的更简单方法.

你也一直在问很多关于PHP的基本问题,而你似乎并没有掌握语言的工作原理.我建议您在下一个问题之前仔细阅读文档.

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