URL redirect/rewrite using the .htaccess file

교교 2016.03.31 07:11:52

Part 1 - How do I redirect all links for www.example.com to example.com ?

 

 

Create a 301 redirect forcing all http requests to use either www.example.com or example.com:

 

Explanation of this .htaccess 301 redirect:

Let's have a look at the example 1 - Redirect example.com to www.example.com. The first line tells apache to start the rewrite module. The next line:

RewriteCond %{HTTP_HOST} !^www.example.com$ [NC]

specifies that the next rule only fires when the http host (that means the domain of the queried url) is not (- specified with the "!") www.example.com.

The $ means that the host ends with www.example.com - and the result is that all pages from www.example.com will trigger the following rewrite rule. Combined with the inversive "!" is the result every host that is not www.example.com will be redirected to this domain.

The [NC] specifies that the http host is case insensitive. The escapes the "." - because this is a special character (normally, the dot (.) means that one character is unspecified).

The final line describes the action that should be executed:

RewriteRule ^(.*)$ http://www.example.com/$1 [L,R=301]

The ^(.*)$ is a little magic trick. Can you remember the meaning of the dot? If not, this can be any character(but only one). So .* means that you can have a lot of characters, not only one. This is what we need because ^(.*)$ contains the requested url, without the domain.

The next part http://www.example.com/$1 describes the target of the rewrite rule. This is our "final" used domain name, where $1 contains the content of the (.*).

The next part is also important, since it does the 301 redirect for us automatically: [L,R=301]. L means this is the last rule in this run. After this rewrite the webserver will return a result. The R=301 means that the webserver returns a 301 moved permanently to the requesting browser or search engine.

 

Redirect to example.com/index.php

 

You have a website with the name example.com and you want to redirect all incoming urls that are going to example.com/ to example.com/index.php

 

 

RewriteEngine On
        RewriteCond %{HTTP_HOST} ^example.com$
        RewriteRule ^$ http://example.com/index.php [L,R=301]

Explanation of this .htaccess 301 redirect:

What does this code above do? Let's have a look at Example 1 - Redirect example.com to www.example.com. The first line starts the rewrite module. The next line:

RewriteCond %{HTTP_HOST} !www.example.com$

specifies that the next rule only fires when the http host (that means the domain of the queried url) is not (- specified with the "!") www.example.com.

The $ means that the host ends with www.example.com - and the result is that all pages from example.com will trigger the following rewrite rule. Combined with the inversive "!" is the result every host that is not www.example.com will be redirected to this domain.

The [NC] specifies that the http host is case insensitive. The escapes the "." - because this is a special character (normally, the dot (.) means that one character is unspecified).

The final line describes the action that should be executed:

RewriteRule ^(.*)$ http://www.example.com/$1 [L,R=301].

The ^(.*)$ is a little magic trick. Remember the meaning of the dot? If not, this can be any character(but only one). The .* means that you can have a lot of characters, not only one. This is what was intended. ^(.*)$ contains the requested url, without the domain.

The next part http://www.example.com/$1 [L,R=301] describes the target of the rewrite rule -this is the "final" used domain name, where $1 contains the content of the (.*).

The next part is also important, since it does the 301 redirect for us automatically: [L,R=301]. L means this is the last rule in this run. After this rewrite the webserver will return a result. The R=301 means that the webserver returns a 301 moved permanently to the requesting browser or search engine.

 

Redirect visitors to a new site

 

You have an old website that is accessible under oldexample.com and you have a new website that is accessible under newexample.com. Copying the content of the old website to the new website is the first step - but what comes after that? You should do a 301 moved permanently redirect from the old domain to the new domain - which is easy and has some advantages:

 

 

Create a 301 redirect for all http requests that are going to the old domain.

 

RewriteEngine On
        RewriteCond %{HTTP_HOST} !oldexample.com$ [NC]
        RewriteRule ^(.*)$ http://www.newexample.com/$1 [L,R=301]