Redirect all but certain requests to index

Question

I have a defined in routes.php a regex that redirects all queries but api to my index template:

return array(
   '<url:(?!api).*>' => ['template' => 'index']
);

I'm trying to exclude robots.txt as well as Google Analytics which is utm_source=analytics_test&utm_medium=referral I've tried the following but it's not quite right:

return array(
   '<url:^(?!api|robots|utm_source)(.*)$>' => ['template' => 'index']
);

Answer 1

This will redirect all queries but urls containing: api or robots or utm_source strings

return array(
   '^(?!.*(api|robots|utm_source)).*$' => ['template' => 'index']
);