nginx - 301 redirect wrong URLs used on extern website
Solution 1:
All URIs in Nginx begin with a leading / and are normalised to remove consecutive //s.
You should change your regular expression to: ^/https:/subdomain\.example\.com/index\.php$ and place it above the location block which matches URIs ending with .php.
Alternatively, use an = operator to exactly match a single URI, for example:
location = /https:/subdomain.example.com/index.php {
return 301 /index.php$is_args$args;
}
See this document for details.