如何基于cookie重定向用户，我面临许多使用php重定向的问题

我正在使用cookie。我的客户希望当访问者访问他的站点时，会自动检查他以前是否访问过此站点。如果他以前访问过此站点，他将自动重定向到他以前访问过的站点。如果他以前没有访问过此网站，cookie将被保存，如果他将来访问此网站，他将被重定向到上次访问的页面。例如，一个站点有许多类别或主题，如食物、布料等。如果访问者以布料主题或类别访问该站点，cookie将被保存。下次他访问这个网站时，他会自动重定向布类页面，因为在过去，他访问了那个页面。但这一次，页脚中的一个选项将再次保存cookie，若他单击接受cookie，cookie将被保存并更新。 现在我尝试在localhost中执行此操作并共享它的文件。请检查有什么问题或在哪里。在这里，我使用header.php中的重定向选项来解决这个问题。如果在index.php中使用重定向选项，则会发生错误（请参见屏幕截图）。如果我在header.php中使用，每个页面都会发生错误。请参见屏幕截图： 您可以访问此网站以获取示例：

我的首页

<?php 
if(isset($_COOKIE['saveexperice'])){

    $link = $_COOKIE['saveexperice'];
    header("Location: $link");
    exit;
}
else{
    header('Location: http://localhost/cookie');
    $exlink = $_SERVER['PHP_SELF'];

    setcookie('saveexperice', $exlink, time()+60*60*24*30);
    exit;
}

---

正如我在评论中提到的，如果我不清楚，您没有任何停止代码，因此无论哪种方式，您都将重定向。您没有不重定向的条件：

<?php
// Move here
$exlink = $_SERVER['PHP_SELF']; 

if(isset($_COOKIE['saveexperice'])){
    $link = $_COOKIE['saveexperice'];
    // If your cookie doesn't match where you are now
    if($exlink != $link) {
        // Redirect
        // NOTE: You may want to check the timestamp and only redirect
        // if the cookie is X-amount of minutes old otherwise you
        // will probably be stuck in another loop, always pushing you
        // to the same page.
        // If it's within the timeframe to not push to another page,
        // then you have to reset the cookie to the current page.
        header("Location: {$link}");
        exit;
    }
}
else{
    setcookie('saveexperice', $exlink, time()+60*60*24*30);
    // I am not sure why you need to redirect here since you are on a page
    // you supposedly want to be on
    header('Location: http://localhost/cookie');
    exit;
}

如果您在标题转发到的页面上，则标题无法匹配，因此它会继续重定向。你必须在标题中有一个
if
，它与你所在的位置相匹配，如果你不在你应该在的位置，那么它会重定向你，如果你在正确的位置，它不会重定向。另一个页面代码是pastebin.com/yjFmt3eg home page pastebin.com/k7rh0jqu谢谢你的回答。我在我的本地主机上使用了这段代码，然后它就工作了，但当我在网站上使用这段代码时，就不在网站上工作了。Cookie不保存，我是在主体内容中回显Cookie，但不要回显它。我怎样才能解决它？你能帮助我吗？另一个页面代码主页好的，我添加了一个带有一些人类可读方法的类。希望这能让你的cookies设置更容易规划。我有一个新的帖子，需要与此相关的帮助，请你看看，你能帮我吗？您好，此cookie在子目录中不工作，我可以使用子目录吗？它在子域中可能有问题（制作cookie时您应该能够指定子域），但我不认为子目录在访问cookie时会出现问题
<a href="clearcooke.php">Logout</a>

<?php 
include("header.php");

print_r($_COOKIE);



echo "Ex php page";


include("footer.php");

<?php 

$exlink = $_SERVER['PHP_SELF'];

setcookie('saveexperice', $exlink, time()-60*60*24*30);

header('location: index.php');

<?php 
include("header.php");



print_r($_COOKIE);



echo "CK php page";


include("footer.php");

<?php
// Move here
$exlink = $_SERVER['PHP_SELF']; 

if(isset($_COOKIE['saveexperice'])){
    $link = $_COOKIE['saveexperice'];
    // If your cookie doesn't match where you are now
    if($exlink != $link) {
        // Redirect
        // NOTE: You may want to check the timestamp and only redirect
        // if the cookie is X-amount of minutes old otherwise you
        // will probably be stuck in another loop, always pushing you
        // to the same page.
        // If it's within the timeframe to not push to another page,
        // then you have to reset the cookie to the current page.
        header("Location: {$link}");
        exit;
    }
}
else{
    setcookie('saveexperice', $exlink, time()+60*60*24*30);
    // I am not sure why you need to redirect here since you are on a page
    // you supposedly want to be on
    header('Location: http://localhost/cookie');
    exit;
}

<?php
# I am calling it Session, but that is because it would have both cookie and session methods
class Session
    {
        private $expireTime,
                $cookieName;
        /*
        ** @description This will set the time for the cookie to expire
        */
        public  function setTime($time)
            {
                $this->expireTime   =   $time;
                return $this;
            }
        /*
        ** @description Returns the name of the last cookie used in the instance
        */
        public  function getName()
            {
                return $this->cookieName;
            }
        /*
        ** @description This will set the name of the cookie
        */
        public  function setName($name = false)
            {
                $this->cookieName   =   $name;
                return $this;
            }
        /*
        ** @description This actually creates the cookie
        */
        public  function setCookie($val, $name = false)
            {
                if(!empty($name))
                    $this->setName($name);

                if(empty($this->cookieName))
                    return false;

                $this->expireTime   =   (!empty($this->expireTime))? $this->expireTime : (time()+60*60*24*30);
                setcookie($this->cookieName,json_encode(array($this->expireTime,$val)),$this->expireTime);
            }
        /*
        ** @description Self-explanatory
        */
        public  function destroyCookie($name = false)
            {
                if(!empty($name))
                    $this->setName($name);

                if($this->cookieExists($this->cookieName))
                    setcookie($this->cookieName,null,(time()-1000));
            }
        /*
        ** @description Self-explanatory
        */
        public  function cookieExists($name = false)
            {
                if(!empty($name))
                    $this->setName($name);

                return (isset($_COOKIE[$this->cookieName]));
            }
        /*
        ** @description Self-explanatory
        */
        public  function getCookie($name = false)
            {
                $cookie =   $this->getCookieData($name);

                return (!empty($cookie[1]))? $cookie[1] : $cookie;
            }
        /*
        ** @description This will get an array of the value and expire time
        */
        public  function getCookieData($name = false)
            {
                if(!empty($name))
                    $this->setName($name);

                return (!empty($_COOKIE[$this->cookieName]))? json_decode($_COOKIE[$this->cookieName],true) : false;
            }
        /*
        ** @description Checks if the cookie is expired
        */
        public  function isExpired($name = false)
            {
                $cookie =   $this->getCookieData($name);
                if(!empty($cookie[0]))
                    return false;

                return true;
            }
        /*
        ** @description Gives an array for a countdown of sorts
        */
        public  function willExpire($name = false)
            {
                $cookie =   $this->getCookieData($name);
                $now    =   strtotime("now");
                if(!empty($cookie[0])) {
                    $seconds    =   ($now - $cookie[0]);
                    return  array(
                                'h'=>trim(number_format(($seconds/60/60),0),'-'),
                                'm'=>trim(number_format(($seconds/60),0),'-'),
                                's'=>trim($seconds,'-')
                            );
                }

                return true;
            }
        /*
        ** @description Resets the expire time on the cookie
        */
        public  function extendTime($time,$name=false)
            {
                $cookie =   $this->getCookieData($name);
                $this->setTime($time)->setCookie($cookie[1]);
            }
    }

<?php
# Add the class
require_once(__DIR__.'/Session.php');
# Create instance
$cEngine    =   new Session();
# Check if the cookie exists already
if(!$cEngine->cookieExists('saveexperice')) {
    # If it doesn't exist, create it by
    # First setting an expire time
    $cEngine->setTime(strtotime('now + 20 minutes'))
            # Add the data
            ->setCookie($_SERVER['PHP_SELF'],'saveexperice');
}
# This would just echo the value
echo $cEngine->getCookie();
# This will tell you when it will expire (count down)
print_r($cEngine->willExpire());
# This will extend the expiration time on the cookie
$cEngine->extendTime(strtotime("now + 1 day"));
# This will destroy the cookie
# $cEngine->destroyCookie();