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mod_rewrite Replace Underscores with hyphens in URL

Hello,

I have a RewriteRule that currently modifies a URL to be more SEO friendly

RewriteRule ^(.*)-c-(.*).html$ index.php?cPath=$2&%{QUERY_STRING}

rule above will take this url and modify it

index.php?cPath=277_280

which would result in something like this:

replacement-parts-c-277_280_295.html

I need it to look like this:

replacement-parts-c-277-280-295.html

what Is for the above Rewrite rule to also replace the underscore with a dash.  I have attempted several changes, but I'm failing at regex syntax.  Is there a way to do this within the one rule above?
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FourMat
Asked:
FourMat
1 Solution
 
Terry WoodsIT GuruCommented:
Is the existing rule working (except for the underscores for dashes part)?

I'm guessing not, but I wanted to check.
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David S.Commented:
You can use the "N" (next) flag to loop and replace characters. (Care must be taken not to create an endless loop!) You can also use the "QSA" (query string append) flag to combine the new query string with any that might already be present. The first rule replaces all underscores except for the last one, which is left for the following non-looping rule to match.
RewriteRule ^(.*-c-[^/_]*?)_([^/_]*?_[^/]*\.html)$ $1-$2 [N]
RewriteRule ^.*-c-([^/_]*?)_([^/_]*)\.html$ index.php?cPath=$1-$2 [QSA]

Open in new window

Mod_Rewrite Documentation
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FourMatAuthor Commented:
David, and Terry, thanks for the responses.  I haven't had a chance to test these ideas (got pulled away on another project briefly)  but will definitely be back on it soon and test, thanks!
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