密码重置链接到期

我想知道是否有人可以帮助我.

I wonder whether someone could help me please.

我已经对密码重置"过程进行了大量研究，并且从我发现的一个教程中，我已经能够将以下代码整合在一起以提供此功能.

I've been doing quite a bit of research on the 'Password Reset' process and from one of the tutorials I found, I've been able to put the following code together which provides this functionality.

忘记密码

<?php

// Connect to MySQL
$c = mysql_connect("host", "user", "password");
mysql_select_db("database", $c);

// Was the form submitted?
if ($_POST["ForgotPasswordForm"])
{
    // Harvest submitted e-mail address
    $emailaddress = mysql_real_escape_string($_POST["emailaddress"]);

    // Check to see if a user exists with this e-mail
    $userExists = mysql_fetch_assoc(mysql_query("SELECT `emailaddress` FROM `userdetails` WHERE `emailaddress` = '$emailaddress'"));
    if ($userExists["emailaddress"])
    {
                // Create a unique salt. This will never leave PHP unencrypted.
                $salt = "KEY";

        // Create the unique user password reset key
$password = md5($salt . $userExists["emailaddress"]);


        // Create a url which we will direct them to reset their password
        $pwrurl = "phpfile.php?q=" . $password;

        // Mail them their key
        $mailbody = "Dear user,\n\nIf this e-mail does not apply to you please ignore it. It appears that you have requested a password reset at our website \n\nTo reset your password, please click the link below. If you cannot click it, please paste it into your web browser's address bar.\n\n" . $pwrurl . "\n\nThanks,\nThe Administration";
        mail($userExists["emailaddress"], "", $mailbody);
        echo "Your password recovery key has been sent to your e-mail address.";
    }
    else
        echo "No user with that e-mail address exists.";
}

?>

重置密码

<?php

// Connect to MySQL
$c = mysql_connect("host", "user", "password");
mysql_select_db("database", $c);

// Was the form submitted?
if ($_POST["ResetPasswordForm"])
{
    // Gather the post data
    $emailaddress = mysql_real_escape_string($_POST["emailaddress"]);
    $password = md5(mysql_real_escape_string($_POST["password"]));
    $confirmpassword = md5(mysql_real_escape_string($_POST["confirmpassword"]));

    $q = $_POST["q"];

    $passwordhint = $_POST["passwordhint"];

    // Use the same salt from the forgot_password.php file
    $salt = "KEY";

    // Generate the reset key
    $resetkey = md5($salt . $emailaddress);

    // Does the new reset key match the old one?
    if ($resetkey == $q)
    {
        if ($password == $confirmpassword)
        {
            // Update the user's password
            mysql_query("UPDATE `userdetails` SET `password` = '$password', `passwordhint` = '$passwordhint' WHERE `emailaddress` = '$emailaddress'");
            echo "Your password has been successfully reset.";
        }
        else
            echo "Your password's do not match.";
    }
    else
        echo "Your password reset key is invalid.";
}

?>

我现在想添加一个发送给用户的链接的到期时间.我一直在*社区和其他许多地方上查看该帖子，但是我一直无法找到我一直在寻找的内容.

I would now like to add a timed expiry of the link that I send out to the user. I've been looking at the post on the * community and many others, but I've not been able to find what I've been looking for.

我只是想知道是否有人可以帮助我，并给我一些有关如何实现这一目标的指导.

I just wondered whether someone could perhaps help me out please and give me a little guidance on how I may accomplish this.

非常感谢.