Question

我想要以下代码header ('Location:'. $U);

正确引导，但我收到以下警告，如何解决。

Warning: Cannot modify header information - headers already sent by (output started at H:\xampp\htdocs\redirected\index.php:8) in H:\xampp\htdocs\redirected\index.php on line 53

我想：

http://mydomian/google redirect to http://google.com

或

http://mydomian/yahoo redirect to http://yahoo.com

或

http://mydomian/anyname redirect to http://Every site that I like

..............................

我的htacess文件：

<Files ~ "^\.(htaccess|htpasswd)$">
deny from all
</Files>
ErrorDocument 404 /redirected/index.php
order deny,allow

在重定向文件夹中我有文件 index.php 和 htaccess.txt ：

htaccess.txt：

/google http://google.com 
/yahoo http://yahoo.com

的index.php：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>script for redirect !!!</title>
</head>
<body>
<form action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?>" method="post">
    <input type="text" name="url" placeholder="e.g google.com" required/>
    <input type="text" name="dir" placeholder="dir" value=<?php echo htmlspecialchars($_SERVER['REQUEST_URI']);?> required/>
    <input type="submit" />
</form>
<?php
    $url = (isset($_POST['url']))   ? $_POST['url'] : '';
    $dir = (isset($_POST['dir']))   ? $_POST['dir'] : '';
    $filename = 'htaccess.txt';
    /*
    *
    * Function to make URLs into links
    *
    * @param string The url string
    *
    * @return string
    *
    */
    function makeLink($string){
        /*** make sure there is an http:// on all URLs ***/
        $string = preg_replace("/([^\w\/])(www\.[a-z0-9\-]+\.[a-z0-9\-]+)/i", "$1http://$2",$string);
        /*** make all URLs links ***/
        $string = preg_replace("/([\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/])/i","<a target=\"_blank\" href=\"$1\">$1</A>",$string);
        /*** make all emails hot links ***/
        $string = preg_replace("/([\w-?&;#~=\.\/]+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?))/i","<A HREF=\"mailto:$1\">$1</A>",$string);

        return $string;
    }

    function redirect($url){
        if (headers_sent()) {
            die('<script type="text/javascript">window.location.href="' . $url . '";</script>');
        }else {
            header('Location: ' . $url);
            die();
        }    
    }
    $f = !empty($dir) ? $dir: htmlspecialchars($_SERVER['REQUEST_URI']);

        $fp = fopen($filename , 'r+') or die("can't open file ! ");
        while ( !feof( $fp ) ) {
            $line = fgets( $fp, 1024 );
            if ($f === strstr($line, ' ', true)) {
                $u = strstr($line, 'http');
                //redirect($u);
                //echo '<script type="text/javascript">window.location.href="' . $u . '";</script>';
                header('Location: ' . $u);
                exit;
            }
        }
        if ($url != '' && !empty($dir)) {

        fseek($fp, 0, SEEK_END); // Go to the end of the file 
        fwrite($fp,"/$dir http://$url \n");
        fclose($fp);
    }

?>
</body>
</html>

感谢

Answer 1

此错误表示执行的页面或标题之前包含的其中一个页面在尝试重定向之前至少回显了一些内容。将标题移到文件中，或确保文件包含的文件不回显任何内容。在你的情况下，你必须将它移动到文件的最顶层，因为你的文件以回显html文件的开头开始。

Answer 2

在html标记之前执行标题重定向，stackoverflow中的很多帖子都应该指出。

<?php
header ('Location:'. $U);
?>
<html>

重定向脚本中的PHP标头不起作用

2 个答案: