Like a lot of web developers, I'm not always that disciplined when it comes to the file naming convention I use and I sometimes end up with a situation whereby I have some files that are in lowercase, some that begin with a capital, and some that are a bit of a mixture.

One web site I maintain contains about 2000 web pages and has about 20,000 hyperlinks. As you can imagine, I had one of those sinking feelings when I was told that in order to migrate the web site to a new content management system, all the file names and hyperlinks would need to be changed to lowercase.

Whenever I am presented with a problem like this, my instinct is always to write a Perl script using one or more regular expressions to solve the problem. This particular situation was no exception.

Change a string to lowercase

The following regular expression changes all the characters in a string to lowercase. The first part of the regular expression finds a hyperlink, and the second part converts the string. (Just in case this article is not displayed correctly, there should be a single backslash in front of the 'L$1').

Change a filename to lowercase

Likewise, changing a filename itself is very simple. The following two lines perform the task quite nicely:

(Again, there should be a single backslash in front of the 'L$name'.)

If you need more information on how to incorporate the above code snippets into a complete script, feel free to contact me directly.

Just what is a 301 Redirect?

There seems to be a lot of confusion as to what to do when you move, delete, or want to redirect incoming web traffic from an 'old' web page to a 'new' web page. A 301 redirect is the most efficient method for web page redirection from an old web page to a new web page location. There is also some confusion as to how to handle the complete move or redirection from one web domain to another web domain. According to Google, "If you need to change the URL of a page as it is shown in search engine results, we recommended that you use a server-side 301 redirect instead."

How to Set Up a 301 Redirect

Depending on your web environment, there are several methods to set up a 301 redirect. A 301 redirect is not that hard to implement and it should preserve your search engine rankings for that particular page or web domain.

.htaccess 301 Redirection

The .htaccess file needs to be placed in the root directory of your old website. In this example, we are redirecting incoming web traffic from an old domain to a new domain.

Options +FollowSymLinks

RewriteEngine on

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

The .htaccess file is the most common method used for 301 web site redirection.

PHP 301 Redirection

You would place this code in a file at the old location.

Header( "HTTP/1.1 301 Moved Permanently" );

Header( "Location: http://www.new_location.com" );?>

IIS 301 Redirection

• In Internet Services Manager, you need to right click on the file or folder you wish to redirect
• Select the radio button titled "a redirection to a URL".
• Enter the redirection web page
• Check "The exact URL entered above" and the "A permanent redirection for this resource"
• Click on 'Apply'

That is all there is to it.

There are other methods in addition to set up a 301 redirection which include coding for ASP, ASP.NET, Java, CGI, Cold Fusion and Ruby on Rails. The above are the most common that I've encountered. When set up correctly, a 301 redirect will preserve your search engine rankings when it is necessary to move files around or switch, or consolidate, domain names.

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