Change of Domain 301 Redirect htaccess

For SEO best practices, when you change domain name of existing website, we need to setup 301 redirect of all existing web pages exactly to a new domain name. This is very important for Search engines detect a new version of URLs

Using the following htaccess code we will redirect all the existing pages of our website to new.

RewriteEngine On
# Redirect all urls with new domain name
RewriteCond %{HTTP_HOST} ^domainone.com$ [OR]
RewriteCond %{HTTP_HOST} ^www.domainone.com$
RewriteRule ^(.*)$ http://www.domaintwo.com/$1 [r=301,nc]

# Redirect with www of new domain.
RewriteCond %{http_host} ^domaintwo.com [nc]
RewriteRule ^(.*)$ http://www.domaintwo.com/$1 [r=301,nc]

about code will redirect all the existing pages of current website to new website with same request URL.

If you need to redirect your domain name with "WWW" you can use the following htaccess code for Apache based web servers.

Redirect with WWW htaccess

Options +FollowSymLinks
RewriteEngine On

# Mention Domain name

RewriteCond %{HTTP_HOST} ^example.com [NC]
Rewriterule ^(.*)$ http://www.example.com/$1 [R=301,NC]

# OR
# get domain name automatically.

RewriteCond %{HTTP_HOST} !^www\.(.*)$ [NC]
RewriteRule ^(.*)$ https://www.%{HTTP_HOST}/$1 [R=301,L]

htaccess redirect with or without www

Developing SEO friendly website, you have to decide the domain name is whether it is with "WWW" or without "WWW". as per your need you can transform the user behavior by redirecting reversal order based on your need. If you decide without WWW mean, while user attempt to type with http://www.example.com you need to redirect http://example.com, If you decide with WWW mean, you need to redirect with www when user typing http://example.com to http://www.example.com

In this case, We have the great option in .htaccess to decide with or without WWW .
Here is the solutions for htaccess redirect with or without www

Examples with mentioning Domain Name

Redirect WWW to non-WWW or without WWW Domain Name:

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

Redirect non-WWW to with WWW Domain Name:

Options +FollowSymLinks
RewriteEngine On
RewriteCond %{HTTP_HOST} ^example.com [NC]
Rewriterule ^(.*)$ http://www.example.com/$1 [R=301,NC]

Example with Suitable for any Website without mentioning the domain name:
(Suitable for any Website) no need to tell the domain name on code.

Redirect www to non-www (both: http + https)
if we need to do this for separate http and https:

Options +FollowSymLinks
RewriteEngine On

# if without https
RewriteCond %{HTTPS} off
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L]

# if https
RewriteCond %{HTTPS} on
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ https://%1/$1 [R=301,L]

Redirect non-www to www (both: http + https)
if we need to do this for separate http and https:

Options +FollowSymLinks
RewriteEngine On

# if without https
RewriteCond %{HTTPS} off
RewriteCond %{HTTP_HOST} !^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]

# if https
RewriteCond %{HTTPS} on
RewriteCond %{HTTP_HOST} !^www\.(.*)$ [NC]
RewriteRule ^(.*)$ https://www.%{HTTP_HOST}/$1 [R=301,L]

Directory Model URL Rewriting with htaccess and map content with php

Creating a dynamic content for web application, we need to consider the Search Engine Optimized web URL structure to main the quality of our web development says "SEO Friendly", Search Engines are clearly identified our web content if we have Directory Model URL structure in our websites. As a developer SEO Friendly URL is very important to any project. Let me explain How to create Directory Model URL Rewriting with htaccess and how to map your content with php.

.htaccess directory structure url rewriting

directory structure:

/index.php
/.htaccess
/include/home.php
/include/about_us.php
/include/contact_us.php