If you're developing a website which uses mod_rewrite rules to redirect to a single point of entry (in which behind the scenes the actual url request gets passed as a query string parameter to "index.php" for example)... something like the following:

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


If you want to be able to hand-off parameters which contain special characters that would normally get urlencoded and urldecoded mod_rewrite will interfere. The trick is to urlencode the portion of the request URL that needs to preserve special characters TWICE!

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