Using variables inside patterns?

[mod35]

Hello, I'm new to this forum, but i noticed there are very advanced people living here . Perhaps you'll be able to give me an idea.

Is there any known approach for using variable patterns?
The simpliest I can guess is

RewriteRule .* - [E=ENV:VAR1:(optA|optB|optC)]
RewriteRule ^(%{ENV:VAR1})$ /path%{ENV:VAR1}/ [R,L]

unfortunately is not acceptable
and neither is the workaround like

RewriteRule .* - [E=ENV:VAR1:(optA|optB|optC)]
RewriteCond %{ENV:VAR1} ^(.*)$
RewriteRule ^(%1)$ /path%{ENV:VAR1}/ [R,L]

both in red are interpreted literally, no substitution

Any idea'll be appreciated.
thank you

[richardk]

Variables in patterns are not allowed. The closest is to use a back reference you created in the pattern (info), for example

Code: Select all

^(a|b|c)-\1$

will match "a-a", "b-b" or "c-c".

Something like this may work

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Options +FollowSymLinks

RewriteEngine On

RewriteRule .* - [E=ENV:VAR1:optA#optB#optC]

RewriteCond $1#%{ENV:VAR1}# ^([^#]+)#(.*#)?\1(#.*)?#$ [NC]
RewriteRule ^([^/]+)/?$ /do-something [R,L]

If you go to /optB,

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$1#%{ENV:VAR1}#

will become

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optB#optA#optB#optC#

The pattern takes whatever is before the first # and checks if it exists between any of the #s.