Question

我尝试了以下内容：

基本上，它应该说：如果没有cookie，请从网络浏览器获取lang（这部分有用，这是lang.php的工作）。如果有cookie，会话将从cookie中获取其值。如果没有，请将其保留为英语。

session.php文件：

/* Class constructor */
function Session(){
    $this->time = time();
    $this->startSession();
}

function cf($filename){//function to clean a filename string so it is a valid filename
    $fp = explode('/',$filename);
    $num = count($fp);
    return $fp[$num-1];
}

/**
 * startSession - Performs all the actions necessary to
 * initialize this session object. Tries to determine if the
 * the user has logged in already, and sets the variables
 * accordingly. Also takes advantage of this page load to
 * update the active visitors tables.
 */
function startSession(){
    session_start();   //Tell PHP to start the session

    /* Set referrer page */
    if(isset($_SESSION['url'])){
        $this->referrer = $search = $this->cf($_SESSION['url']);
    }else{
        $this->referrer = "/";
    }

    /* Set current url */
    $this->url = $_SESSION['url'] = $this->cf($_SERVER['PHP_SELF']);

    /* Set user-determined language: */
    //set up languages array:
    $langs = array('en','es','zh');
    //
    if(isset($_GET['lang'])){
        if(in_array($_GET['lang'],$langs)){
            $this->lang =  $_SESSION['lang'] = $_GET['lang'];
            setcookie($_SESSION['lang'], time() + (3600 * 24 * 30));
        }
    }
    else if(isSet($_COOKIE['lang'])) {
        $_SESSION['lang'] = $_COOKIE['lang'];
    }
    else {
        $_SESSION['lang'] = 'en';
    }
}

};

Answer 1

setcookie的第一个参数是cookie名称，第二个参数是cookie值。因此，在这种情况下，$_SESSION['lang']是Cookie名称，time() + (3600 * 24 * 30)是值：

setcookie($_SESSION['lang'], time() + (3600 * 24 * 30));

Answer 2

setcookie的参数如下：

bool setcookie ( string $name [, string $value [, int $expire = 0 [, string $path [, string $domain [, bool $secure = false [, bool $httponly = false ]]]]]] )

因此，你使用它的方式似乎有点奇怪。（这说的并不是错误的。）我想到了像...这样的东西。

setcookie('lang', $_SESSION['lang'], time() + (3600 * 24 * 30));

......会更明显一点，也许就是你所追求的。（这就是$ _COOKIE ['lang']所要求的。）

Cookie不能用于php会话文件：

2 个答案: