Re-writing url - apache - htaccess - apache

Question

I am migrating an existing website to a Codeigniter one so need a help with re-writing of the urls.
I need to map old URLs with new URLs so that people visiting site from search engine results get redirected to matching new URLs as otherwise they would get page not found errors.
Most of the old urls in this format e.g.
/page.php?id=5 or /page.php?id=180&t=78
/data.php?token=GH45LK
/faqs.php?k=98#section2
Their matching new URLs are
/page/5 or I will be happy with /page?id=5&whatever=xyz too
/data/GH45LK
/faqs/98#section2
This is my current .htaccess of CodeIgniter
# Turning on the rewrite engine is necessary for the following rules and features.
# FollowSymLinks must be enabled for this to work.
<IfModule mod_rewrite.c>
Options +FollowSymlinks
RewriteEngine On
# If you installed CodeIgniter in a subfolder, you will need to
# change the following line to match the subfolder you need.
# http://httpd.apache.org/docs/current/mod/mod_rewrite.html#rewritebase
RewriteBase /
# Redirect Trailing Slashes...
RewriteRule ^(.*)/$ /$1 [L,R=301]
# Rewrite "www.example.com -> example.com"
RewriteCond %{HTTPS} !=on
RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]
RewriteRule ^ http://%1%{REQUEST_URI} [R=301,L]
# Checks to see if the user is attempting to access a valid file,
# such as an image or css document, if this isn't true it sends the
# request to the front controller, index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]
# Ensure Authorization header is passed along
RewriteCond %{HTTP:Authorization} .
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
</IfModule>
I tried something like this after RewriteBase / line
RewriteRule ^data\.php\?token=(.*)?$ data/=$1 [R=301,L]
but not sure if I got that right as it's not working.
Could you help me getting it right? Thx

Answer 1

RewriteRule does not work that way: it only test the path part of an URL. For all the other parts (domain, query string, ...), you need to use RewriteCond and the corresponding variable (%{QUERY_STRING}, for the query string/here).
RewriteCond %{QUERY_STRING} (?:^|&)id=(\d+)
RewriteRule ^page\.php$ /page/%1 [L,R=permanent]
RewriteCond %{QUERY_STRING} (?:^|&)token=([^&]+)
RewriteRule ^data\.php$ /data/%1? [L,R=permanent]
RewriteCond %{QUERY_STRING} (?:^|&)k=(\d+)
RewriteRule ^faqs\.php$ /faqs/%1? [L,R=permanent]
And I think there is an error with RewriteCond %{HTTPS} !=on as you redirect on http://, not https://, this should result in an infinite loop.
Also note that the anchor (#section2 in your example), is not sent to the server (so it can't be rewritten).