Suppose I have URLs with query string parameters like these:
/index.php?book=DesignPatterns&page=139
/index.php?book=Refactoring&page=285
Using mod_rewrite, how can I redirect them to SES URLs like these?
/DesignPatterns/139
/Refactoring/285
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1 Answer
RewriteCond %{QUERY_STRING} book=(\w+)&page=(\d+)
RewriteRule ^index.php /%1/%2? [L,R=301]
Because RewriteRule only looks at the path (up to but not including the question mark), use RewriteCond to capture the values in the query string.
Note that the matches from RewriteCond are captured in %1,
%2, etc., rather than $1, $2, etc.
Also note the ? at the end of RewriteRule. It tells mod_rewrite
not to append the original query string to the new URL, so you end up with
/DesignPatterns/151 intead of
/DesignPatterns/151?book=DesignPatterns&page=151.
The [L,R=301] flags do two things:
Lensures that no other rules that might otherwise match will be processed (in other words, it ensures this is the "last" rule processed).R=301causes the server to send back a redirect response. Instead of rewriting, it tells the client to try again with the new URL. The=301makes it a permanent redirect, so that, among other things, search engines will know to replace the old URL with the new URL in their indexes.
7 Comments
TheJosh
You probably also want the [L] flag when you have multiple rewrite rules. The [L] flag stops processing after the rule has matched, and the [R] flag DOES NOT implicitly include it.
keithwyland
The $ vs % were killing me. I had no idea. Thank you!
Uzair Farooq
To not append the original query string to the new url use
[QSD] flag (httpd.apache.org/docs/2.4/rewrite/flags.html#flag_qsd)
Luciano
Answers like this make me wish I could star them for later easy finding. Instead I end up starring the question.
ahnbizcad
isn't this invalid? you'd need to escape the dot in
^index.php with ^index\.php |