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Turns out after researching, one site found duplicate content on my website.

The reason is because the unfriendly php file that friendly URLs link to was apparently discovered by a robot and then got spread.

What I want to do is fix this issue without causing a redirect loop.

I'll explain by example:

Currently To redirect the contacts page with mod_rewrite, I use:

RewriteRule ^contact$ /index2.php?A=CONTACT [L]

But the problem is http://example.com/contact and http://example.com/index2.php?A=CONTACT are both accessible and point to exactly the same page, yet I don't want the latter URL directly accessible in a browser.

I was thinking using something like:

RewriteRule ^index2.php$ ??? [L]
RewriteRule ^contact$ /index2.php?A=CONTACT [L]

Because I need to handle the php file but I can't replace the ??? with /contact or I'll be creating an endless loop.

I was thinking of adding this to the top to prevent a second round of looping from happening:

RewriteCond %{ENV:REDIRECT_STATUS} !^$
RewriteRule .* - [L]

But I'm not sure if that's of any help.

If anyone has run into this situation can someone give me a hand on how to fix it?

  • Not sure you got my last ping... I updated the answer with the assumption there was a /contact directory. If not, then it is back to the drawing board. – closetnoc Jul 3 '15 at 17:52
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In order to redirect from the "unfriendly" URL to the "friendly" URL, avoiding rewrite loops, you can check against %{THE_REQUEST} (which contains the initial HTTP request). For example:

RewriteCond %{THE_REQUEST} \?A=CONTACT
RewriteRule ^index2\.php /contact? [R=301,L]

This should come before the internal rewrite that turns the "friendly" URL into the actual URL.

Since you are using different case for the URL parameter ("CONTACT") and the URL-path ("contact") it will be tricky to make this rule more generic without using RewriteMap in your server config (not .htaccess). Although this could be handled in your code instead.

  • @MIke Try this first!! – closetnoc Jul 3 '15 at 22:39
  • w3d's answer seems to help with a question mark added before [R=301,L] What I did in my php code however was check the redirect_status variable since it returns a number on any RewriteRule processed. If w3d's idea lowers the overall TTFB of the site then I'll use it instead. – Mike Jul 4 '15 at 0:26
  • Ah yes (oops forgot!), the ? is required at the end of the RewriteRule substitution in order to remove the query string (added to answer). (Or you can use the QSD flag if using Apache 2.4+). Doing this in Apache config (.htaccess) is going to be quicker and more efficient than handing this over to PHP. You can check %{ENV:REDIRECT_STATUS} in .htaccess as well (it is an Apache environment variable), but it is no better than the above. – MrWhite Jul 4 '15 at 0:53

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