Cookie 不适用于 php 会话文件：

Question

我尝试了以下方法：

基本上，它应该说：如果没有 cookie，则从 Web 浏览器获取 lang（这部分有效，这是 lang.php 的工作）。如果有 cookie，会话将从 cookie 中获取其值。如果没有任何内容，请保留为英文。

session.php：

/* 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，您使用它的方式似乎有点奇怪。 （说的没错。）我还以为是这样的……

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'] 所需要的。）

Answer 2

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

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