How can the N flag in mod_rewrite be used effectively to prevent loops in URL redirection?

The N flag in mod_rewrite can be used effectively to prevent loops in URL redirection by telling Apache to reprocess the request with the rewritten URL. This can help avoid infinite loops that may occur when a rewritten URL matches the original URL pattern. By using the N flag, Apache will continue to process the rewritten URL until no more rules are applied, preventing redirection loops.

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?url=$1 [L,N]