What's wrong with my RewriteRule via .htaccess? (Why does it need RewriteBase?)

Question

rewriteengine on
rewriterule ^/a/b$ ^/c$

not working,but

rewriteengine on
rewritebase /
rewriterule ^a/b$ ^c$

wo

Answer 1

What version of Apache are you using? RewriteBase should not be necessary when you are rewriting from the root. If you are not, you may need it. For instance, a part of my current configurations (Apache 2.2) for one of my blogs looks as follows, and works:

RewriteEngine On    
RewriteRule ^/$ /blog/ [R]
RewriteRule ^/wordpress/(.*) /blog/$1 [R]