Rewrite problems in Nginx configuration

I want to implement user requests x.com/api/dosomethingForward to the root directory of the Web site /api.phpProcessing.
Files that do not exist are given to /index.phpProcessing, nginx configuration is as follows

 if (!-e $request_filename) {         rewrite (.*) /index.php$1 last;     }location ^~ /api/{    rewrite (.*) /api.php$1 last;}location ~ (index|api|admin).php {         fastcgi_split_path_info ^(.+\.php)(/.+)$;         fastcgi_pass 127.0.0.1:9000;         fastcgi_index index.php;         include fastcgi_params;         fastcgi_param PATH_INFO $fastcgi_path_info;         fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;     }

But I found that when the visit was matched, the order of the alignment was x.com/api/dosomething ! -e $request_filename not used, how should I configure

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I want to implement x.com/api/dosomething the processing that the user request forwards to the Web site root directory /api.php .
Non-existent files are given /index.php to the processing, nginx configuration is as follows

 if (!-e $request_filename) {         rewrite (.*) /index.php$1 last;     }location ^~ /api/{    rewrite (.*) /api.php$1 last;}location ~ (index|api|admin).php {         fastcgi_split_path_info ^(.+\.php)(/.+)$;         fastcgi_pass 127.0.0.1:9000;         fastcgi_index index.php;         include fastcgi_params;         fastcgi_param PATH_INFO $fastcgi_path_info;         fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;     }

But I found that when the visit was matched, the order of the alignment was x.com/api/dosomething ! -e $request_filename not used, how should I configure

I look at the configuration right ah, I try to say in the local ...

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