I am using Nginx 1.13 and have read that using "if" is a poor solution. I have looked through my configuration file and found one and would like to rewrite it without the "if". Does anyone know how to rewrite this snippet?

## Execute PHP Scripts using FastCGI
location ~ \.php(/.*)? {
if (!-e $request_filename) {
rewrite / /index.php last;
}

Thanks