If you read up on the syntax of RewriteRule in Apache's mod_rewrite support, you may be led to believe that the full extent of Perl Regular Expressions is supported. After all, the following shows up verbatim in the RewriteRule documentation:
For more information about regular expressions, have a look at the perl regular expression manpage ("perldoc perlre").
However, I've found that it just isn't so. In an attempt to match a string of digits in a request and redirect to a page when the condition is met, I did something like the following:
RewriteRule ^\d\d\d /flames/ [L]
If working properly, a request to http://www.example.com/666 would redirect to http://www.example.com/flames/. However, it wasn't doing what I wanted to. I even tried using ^\d{3} as my pattern, but no dice.
As it turns out, it appears that mod_rewrite prefers character sets in RewriteRule patterns. Therefore, the following works as expected:
RewriteRule ^[0-9]{3} /flames/ [L]
So if you're trying to match numbers/digits in a RewriteRule, be sure to use a character set instead of the \d digit shortcut so you can avoid wasting half-an-hour of your time like I just did.
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Thank you! You just saved me half an hour :-)
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