PHP定时重定向不重定向

Question

在我的网站上有这段代码，一旦用户注销并破坏他们的会话，将用户重定向回主页。当我使用我的其他托管帐户来托管网站时，它工作得很好，但现在我已经更改了主机，它似乎不再工作了?它实际上什么也没做。它会销毁会话，但不会重定向?域名保持不变，所以我不明白这里出了什么问题?什么好主意吗?

    <?
session_start();
if(!isset($_REQUEST['logmeout'])){
    echo "<strong><font color=green>Are you sure you want to logout?</font></strong><br />";
    echo "<a href=logout.php?logmeout>Yes</a> | <a href=javascript:history.back()>No</a>";
} 
else {
    session_destroy();
    if(!session_is_registered('first_name')){
        echo "<center><font color=red><strong>You have now been logged out.</strong></font></center><br />";
        echo "<center>You will be redirected in 3 second...</center><br />";
        /* Redirect browser */
        header('Refresh: 3;url=http://www.basecentre.co.uk/');
/* Make sure that code below does not get executed when we redirect. */
exit;
    }
}
?>

Answer 1

TRY THIS

  echo "<meta http-equiv='refresh' content='0;url=http://www.yoursite.com'>";

或在header调用前使用flush()

Answer 2

您以前的主机可能已经启用了自动输出缓冲。

要避免"headers already sent"错误，请修改

    echo "<center><font color=red><strong>You have now been logged out.</strong></font></center><br />";
    echo "<center>You will be redirected in 3 second...</center><br />";
    /* Redirect browser */
    header('Refresh: 3;url=http://www.basecentre.co.uk/');

    /* Redirect browser */
    header('Refresh: 3;url=http://www.basecentre.co.uk/');
    echo "<center><font color=red><strong>You have now been logged out.</strong></font></center><br />";
    echo "<center>You will be redirected in 3 second...</center><br />";

注意，header()函数发生在任何内容的回显之前。

Answer 3

您不能在任何输出后执行header。php.ini中有一个设置可以改变这一点，但除此之外，最好在输出之前发送头信息。

但是，看起来你想在他们被重定向到任何地方之前给他们一个通知。为了保持这一点，只需用javascript做同样的方式你做了另一个。

     echo "<center><font color=red><strong>You have now been logged out.</strong></font></center><br />";
     echo "<center>You will be redirected in <span id="time">3<span> second...</center><br />";
    //And then echo the redirect script. 
    echo <<<JAVASCRIPT
    <script>
    var count = 3;
        var counter = setInterval(timer, 1000);
        function timer() {
            count = count - 1;
            if (count <= 0) {
                window.location.pathname = '/user/index';
            }
            document.getElementById("time").innerHTML = count;
        }
        window.onload = timer(); 
    </script>
    JAVASCRIPT;