我如何使令牌过期时间 [英] How do i make a token expire time

问题描述

我目前有生成令牌的功能，但我如何让它过期?此外，令牌的良好保质期是多少?

I currently have functions to generate a token, but how would i go about making it expire?Also, what would be a good shelf-life for the token?

代币生成代码:

function token($length = 40) {
    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $charactersLength = strlen($characters);
    $token = 12000;
    $token = srand(floor(time() / $token));
    for ($i = 0; $i < $length; $i++) {
        $token .= $characters[rand(0, $charactersLength - 1)];
    }
    return $token;
}

推荐答案

最佳实践是有一个数据库表来存储创建的令牌信息...

Best practice is to have a database table that stores the information of tokens created...

id | expiry_timestamp | token ...

然后编辑代码以存储使用其到期时间戳创建的每个令牌...

Then edit the code to store each token created with its expiry_timestamp...

function token($length = 40, $expiry) {
    // Set expiry_timestamp..
    $expiry_timestamp = time() + $expiry;

    // Generate the token...
    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $charactersLength = strlen($characters);
    $token = 12000;
    $token = srand(floor(time() / $token));
    for ($i = 0; $i < $length; $i++) {
        $token .= $characters[rand(0, $charactersLength - 1)];
    }

    /** Do a quick manipulation in the token table...
    * ...Connect to database table then execute following SQL statement..
    * mysqli_query($link, "INSERT INTO token_table (token, expiry_timestamp) VALUES($token, $expiry_timestamp)");
    */

    return array($token,$expiry);
}

如果你想检查它是否已经过期，你可以使用另一个函数来获取它的expiry_timestamp并确认它是否大于当前时间戳

Just incase you want to check if it has expired, you can use another function to fetch its expiry_timestamp and confirm whether or not, it is greater than the current timestamp

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