How Evil is If?

In my wordpress Multisite config, I have the below lines. I’ve read
if-is-evil and so I’m curious if these ifs need to be replaced and with
what?


For multisite: Use a caching plugin/script that creates symlinks to

the correct subdirectory structure to get some performance gains.
set $cachetest
“$document_root/wp-content/cache/ms-filemap/${host}${uri}”;
if ($uri ~ /$) {
set $cachetest “”;
}
if (-f $cachetest) {
# Rewrites the URI and stops rewrite processing so it doesn’t
start over and attempt to pass it to the next rule.
rewrite ^ /wp-content/cache/ms-filemap/${host}${uri} break;
}

if ($uri !~ wp-content/plugins) {
rewrite /files/(.+)$ /wp-includes/ms-files.php?file=$1 last;
}

Uncomment one of the lines below for the appropriate caching plugin

(if used).

include global/wordpress-ms-subdir-wp-super-cache.conf;

include global/wordpress-ms-subdir-w3-total-cache.conf;

Rewrite multisite ‘…/wp-.’ and '…/.php’.

if (!-e $request_filename) {
rewrite ^/[_0-9a-zA-Z-]+(/wp-.) $1 last;
rewrite ^/[_0-9a-zA-Z-]+(/.
.php)$ $1 last;
}


Posted at Nginx Forum:
http://forum.nginx.org/read.php?2,226819,226819#msg-226819

You have well-documented pages about that.
http://wiki.nginx.org/IfIsEvil (which also expalins why ‘if’ is evil)
http://wiki.nginx.org/Pitfalls

Are you trying to make the community do your part of the job? ;o)

B. R.