Home php教程 php手册 apache+php完美解决301重定向的两种方法

apache+php完美解决301重定向的两种方法

Jun 13, 2016 pm 12:08 PM
301 Perfect method have efficient of able solve Redirect

幸好有301重定向能有效解决这样的问题。正如月光博客这篇文章中说的,
301重定向可促进搜索引擎优化效果
从搜索引擎优化角度出发,301重定向是网址重定向最为可行的一种办法。当网站的域名发生变更后,搜索引擎只对新网址进行索引,同时又会把旧地址下原有的外部链接如数转移到新地址下,从而不会让网站的排名因为网址变更而收到丝毫影响。同样,在使用301永久性重定向命令让多个域名指向网站主域时,亦不会对网站的排名产生任何负面影响。

关于301重定向的更多内容,大家不妨Google一下。本文只介绍实现方法啦!
301重定向的实现,我以前也写过一篇相关的文章,但这篇文章的解决方法比较简单,只能实现主页的跳转,本文介绍的这两种方法,可以完美实现301重定向。

方法1:修改.htaccess文件
代码如下:

复制代码 代码如下:



RewriteEngine On
RewriteCond %{HTTP_HOST} blog.iflyhigher.tk$ [NC]
RewriteRule ^(.*)$ http://blog.jb51.net/$1 [R=301,L]
RewriteCond %{HTTP_HOST} iflyhigher.tk$ [NC]
RewriteRule ^(.*)$ http://jb51.net/$1 [R=301,L]
RewriteCond %{HTTP_HOST} moiya.tk$ [NC]
RewriteRule ^(.*)$ http://jb51.net/$1 [R=301,L]


本博需要对三个域名进行重定向,所以写的比较多,关键代码就是2句话

复制代码 代码如下:


RewriteCond %{HTTP_HOST} blog.iflyhigher.tk$ [NC]
RewriteRule ^(.*)$ http://blog.jb51.net/$1 [R=301,L]


红色的域名是需要被重定向的旧域名,绿色的是现在网站的域名。
方法2:使用PHP的重定向代码
新建一个index.php文件,然后参考下面代码按自己的重定向要求做简单修改:

复制代码 代码如下:


$the_host = $_SERVER['HTTP_HOST'];
$request_uri = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '';
switch ($the_host)
{
case "www.iflyhigher.tk":
case "iflyhigher.tk":
$location = "Location: http://jb51.net" . $request_uri;
break;
case "blog.iflyhigher.tk":
$location = "Location: http://blog.jb51.net" . $request_uri;
break;
case "www.moiya.tk":
case "moiya.tk":
$location = "Location: http://jb51.net";
break;
default:
$location = "Location: http://jb51.net";
break;
}
header('HTTP/1.1 301 Moved Permanently');
header($location);
exit();
?>


如果只要对一个域名进行重定向,可以把代码简化成下面的形式:

复制代码 代码如下:


$the_host = $_SERVER['HTTP_HOST'];//取得进入所输入的域名
$request_uri = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '';//判断后面的请求部分
if($the_host !== 'jb51.net')//jb51.net是我现在的域名
{
header('HTTP/1.1 301 Moved Permanently');//发出301头部
header('Location: http://jb51.net'.$request_uri);//跳转到我的新域名地址
exit();
}
?>


注意,最后的exit()函数是一定要写的,我最初就没有写,结果只能重定向首页,像http://blog.iflyhigher.tk/guestbook这样的网页,就无法进行重定向。
最后,关于重定向的一些细节
由于要对三个域名进行重定向,重定向前,我首先将这三个域名作为Addon Domain绑定到我的服务器上去,并让这三个域名指向同一个文件夹,这样,只要修改这一个文件夹中的.htaccess文件或者index.php文件就可以了。如果没有.htaccess文件或者index.php文件,新建一个即可。
希望本文对需要进行301重定向的朋友有帮助。
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