问题描述

我有以下 PHP 函数:

I have the following PHP function:

function validateUser($username){
    session_regenerate_id (); 
    $_SESSION['valid'] = 1;
    $_SESSION['username'] = $username;
    setcookie('username2',$username,time()+60*60*24*365);
    header("Location: ../new.php");
}

然后我获取cookie:

And then I fetch the cookie:

echo $_COOKIE['username2'];exit();

(我只把 exit() 用于调试目的)

(I only put exit() for debugging purposes)

唯一的问题，它出来是空白的.有什么想法吗?

Only problem, it's coming out blank. Any ideas?

更新:函数是这样调用的:

    if(mysql_num_rows($queryreg) != 0){
    $row = mysql_fetch_array($queryreg,MYSQL_ASSOC);
    $hash = hash('sha256', $row['salt'] . hash('sha256', $password));
    if($hash == $row['password']) {
        if($row['confirm'] == 1){
            if(isset($remember)){
                setcookie('username',$username,time()+60*60*24*365);
                setcookie('password',$password,time()+60*60*24*365);
            } else {
                setcookie('username','',time()-3600);
                setcookie('password','',time()-3600);
            }
            validateUser($username);

为了节省空间，我没有包含所有的 if() 语句.

I didn't include all the if() statements to save some space.

推荐答案

尝试添加路径 =/，这样 cookie 就适用于整个站点，而不仅仅是当前目录(之前已经引起我注意)

try adding the path = /, so that the cookie works for the whole site not just the current directory (that has caught me out before)

示例

setcookie('password',$password,time()+60*60*24*365, '/'); 

还要确保 cookie 是第一个被输出的东西正如 php 手册中所建议的那样(这也让我感到困惑)

also make sure the cookie is the first thing being output as advised in the php manual (this has caught me out before too)

像其他标头一样，cookie 必须在您的任何输出之前发送脚本(这是一个协议限制).

Like other headers, cookies must be sent before any output from your script (this is a protocol restriction).

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