301 redirect in PHP and .htaccess

Posted on December 29, 2007
Filed Under htaccess, php

What is 301 redirect ?

You have a website and its all pages are ranked in the search engine. And now you’ve moved these files to a new domain. What will happen in this scenario!!. You are sending the visitor to “Error 404 - File not found” page when they follow your website in the search engine. Furthermore, if you place the custom error page, then also you will be keep loosing ranking in upcoming days in search engines as the original file could not be found in the old URL. So what is the solution for this?? The solution is 301 redirect which means moved permanently. It is is the most efficient and search engine as well as visitor friendly method for the webpage redirection.

Why do you need 301 redirect ?

Have you ever typed yahoo.com in your browser, what happens next is it will redirect you to www.yahoo.com, its all the result of the 301 redirect. so, why do you need to do so?. If you’re not doing so, then you’re splitting yourself to two different URL and search engine spiders can also crawls your site’s content by two different URL which may result to “duplicate content” penalty by search engines if search engines collect two copies of the same data from two different URLs.

How to do 301 redirect in PHP ?

If you want to redirect a single page to another location then put the following code in the old page which have been moved.

<?php
 header('HTTP/1.1 301 Moved Permanently');
 header('Location: http://www.new-domain.com/new-file-name.php');
?>

If you want to redirect non-www to www domain name then put the following code into top of every page of the website

<?php
if (substr(getenv('HTTP_HOST'),0,3) != 'www')
{
  header('HTTP/1.1 301 Moved Permanently');
  header('Location:http://www.'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']);
}
?>

How to do 301 redirect in .htaccess file?

Put the following code into the .htaccess file and upload it into the root folder of the website. Note that this file only works for the website which is running under Apache Web Server.

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

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Comments

5 Responses to “301 redirect in PHP and .htaccess”

5 useful url rewriting examples using .htaccess on March 11th, 2008 4:18 am

[...] If you type yahoo.com in browser it will be redirected to http://www.yahoo.com. If you want to do same with your website then put the following code to .htaccess file. What is benefit of this kind of redirection?? Please check the post about SEO friendly redirect (301) redirect in php and .htaccess. [...]
php-web-developer on May 20th, 2008 7:21 am

very helpful article..keep it up your work
Domain Redirects on June 24th, 2008 5:42 pm

Which brings up the question - is there a point in keeping your old page up if the .htaccess redirect is in place? In other words, does a search engine need both the page and the .htaccess redirect to complete the redirect, or only the .htaccess redirect?
Roshan on June 24th, 2008 6:39 pm

No not at all…you don’t need to place the old page up for the .htaccess redirect
Multibytes India » url rewriting on September 22nd, 2008 9:41 am

[...] If you type yahoo.com in browser it will be redirected to http://www.yahoo.com. If you want to do same with your website then put the following code to .htaccess file. What is benefit of this kind of redirection?? Please check the post about SEO friendly redirect (301) redirect in php and .htaccess. [...]