Php domain name 301 redirection program code

Note:

301,302 is an HTTP status code, indicating that a URL has been transferred. The difference is:
301 redirect: 301 represents permanent transfer (Permanently Moved ),
302 redirect: 302 indicates temporary transfer (Temporarily Moved ),

Example

In php, normal temporary redirection is usually used:
 

The code is as follows:	Copy code
<? Php Header ("Location: your_dest_url "); ?>

Simplest practice

The code is as follows:	Copy code
$ The_host = $ _ SERVER ['http _ host']; // Obtain the current domain name If ($ the_host! = 'Noniu. Com') // determines if the obtained domain name is what you want (that is, the domain name after targeting) { Header ("HTTP/1.1 301 Moved Permanently"); // issue the 301 header Header ("Location: 111cn.net) // jump to the expected domain name Exit (); }

This can also be implemented, for example, to jump to www.111cn.net on 111cn.net, that is, to make all the pages use a URL with www

The code is as follows:

Copy code

<? Php $ The_host = $ _ SERVER ['http _ host']; // Obtain the current domain name $ The_url = isset ($ _ SERVER ['request _ URI '])? $ _ SERVER ['request _ URI ']: ''; // judge the part after the address $ The_url = strtolower ($ the_url); // convert the English letters to lowercase letters. If ($ the_url = "/index. php") // You can check whether the homepage is correct. { $ The_url = ""; // if the homepage is displayed, the value is null. } If ($ the_host! = 'Www .111cn.net ') // if the domain name is not a url with www, perform the following 301 redirect. { Header ('http/1.1 301 Moved Permanently '); // issue the 301 header Header ('Location: http://www.111cn.net '. $ the_url); // jump to the URL with www } ?>

7. Switch to code 301 in Apache

Create a new. htaccess file and enter the following content (mod_rewrite must be enabled ):

1) switch the domain name without WWW to the domain name with WWW

The code is as follows:	Copy code
Options + FollowSymLinks RewriteEngine on RewriteCond % {HTTP_HOST} ^ lesishu.cn [NC] RewriteRule ^ (. *) $ http://www.111cn.net/$1 [L, R = 301]

2) redirect to a new domain name

The code is as follows:	Copy code
Options + FollowSymLinks RewriteEngine on RewriteRule ^ (. *) $ http://www.111cn.net/$1 [L, R = 301]

Wordpres root directory 301 jump

The code is as follows:

Copy code

# BEGIN WordPress Options + FollowSymlinks RewriteEngine on RewriteCond % {http_host} ^ 111cn.net [NC] RewriteRule ^ (. *) $ http://www.111cn.net/$1 [L, R = 301] RewriteCond % {THE_REQUEST} ^ [A-Z] {3, 9}/index. php HTTP/ RewriteRule ^ index. php $ http://www.111cn.net/[R = 301, L] RewriteRule ^ index. php $-[L] RewriteCond % {REQUEST_FILENAME }! -F RewriteCond % {REQUEST_FILENAME }! -D RewriteRule./index. php [L] # END WordPress

Test

 

Analysis:

Php 301 jump code is only applicable to full php page or single page jump, apache/iis 301 jump applies to a large number of website domain names 301 jump, both of them share 301 in common, but each of them has advantages. You can choose one based on your own situation.