how to use AND OR for RewriteCond on Apache

Question

Is this how to use AND  OR for RewriteCond on Apache   rewritecond A  or  rewritecond B rewritecond C  or  rewritecond D RewriteRule     something   becomes if    A or B  and  C or D    rewrite it   So it seems like  OR  is higher precedence than  AND    Is there a way to easily tell  like in the   A or B  and  C or D  syntax

User · Answer

Having trouble wrapping my head around this.

Have a rewrite rule with four conditions.
The first three conditions A, B, C are to be AND which is then OR with D

RewriteCond A       true
RewriteCond B       false
RewriteCond C [OR]  true
RewriteCond D       true
RewriteRule ...

But that seems to be an expression of A and B and (C or D) = false (don't rewrite)

How can I get to the desired expression? (A and B and C) or D = true (rewrite)

Preferably without using the additional steps of setting environment variables.

HELP!!!

User · Answer

After many struggles and to achive a general  flexible and more readable solution  in my case I ended up saving the ORs results into ENV variables and doing the ANDs of those variables     RESULT ONE   A OR B RewriteRule   -  E RESULT ONE False  RewriteCond    A     OR  RewriteCond    B    RewriteRule   -  E RESULT ONE True     RESULT TWO   C OR D RewriteRule   -  E RESULT TWO False  RewriteCond    C     OR  RewriteCond    D    RewriteRule   -  E RESULT TWO True     if   RESULT ONE AND RESULT TWO   then   RewriteRule    something      RewriteCond   ENV RESULT ONE   True RewriteCond   ENV RESULT TWO   True RewriteRule    something      Requirements    Apache mod env enabled

User · Answer

This is an interesting question and since it isn t explained very explicitly in the documentation I ll answer this by going through the sourcecode of mod rewrite  demonstrating a big benefit of open-source   In the top section you ll quickly spot the defines used to name these flags    define CONDFLAG NONE               1 lt  lt 0  define CONDFLAG NOCASE             1 lt  lt 1  define CONDFLAG NOTMATCH           1 lt  lt 2  define CONDFLAG ORNEXT             1 lt  lt 3  define CONDFLAG NOVARY             1 lt  lt 4   and searching for CONDFLAG ORNEXT confirms that it is used based on the existence of the  OR  flag   else if     strcasecmp key   ornext      0             strcasecmp key   OR      0            cfg- gt flags    CONDFLAG ORNEXT      The next occurrence of the flag is the actual implementation where you ll find the loop that goes through all the RewriteConditions a RewriteRule has  and what it basically does is  stripped  comments added for clarity      loop through all Conditions that precede this Rule for  i   0  i  lt  rewriteconds- gt nelts    i        rewritecond entry  c    amp conds i          execute the current Condition  see if it matches     rc   apply rewrite cond c  ctx          does this Condition have an  OR  flag      if  c- gt flags  amp  CONDFLAG ORNEXT            if   rc                   One condition is false  but another can be still true                 continue                    else                  skip the rest of the chained OR conditions                while     i  lt  rewriteconds- gt nelts                     amp  amp  c- gt flags  amp  CONDFLAG ORNEXT                    c    amp conds   i                                     else if   rc            return 0            You should be able to interpret this  it means that OR has a higher precedence  and your example indeed leads to if    A OR B  AND  C OR D     If you would  for example  have these Conditions   RewriteCond A  or  RewriteCond B  or  RewriteCond C RewriteCond D   it would be interpreted as if    A OR B OR C  and D

[mod-rewrite] how to use "AND", "OR" for RewriteCond on Apache?

Examples related to mod-rewrite

Examples related to apache-config