RewriteRule that preserves GET parameters

Question

What is wrong with this rewrite rule?

RewriteRule ^api/(.+)$ api/index.php?url=$1 [L]

I simply want \"index.php?url=\" to be added after ap

Answer 1

The regex on the RewriteRule is only run against the path part of the URL, not the query parameters. Fortunately there is the [QSA] flag to preserve existing query parameters.