Nginx：如何将nonx-existing .php文件重写为index.php？

Below you see the part of my server which works brilliant, but now i have to "simulate" a php file which does not exists.

location ~ \.php$
{ 
 fastcgi_pass php;
 include fastcgi.conf;
}

try_files $uri $uri/ /index.php?$uri&$args;

All my urls are currently rewritten du the try_files setting to my index.php, but not if i try to access domain.tld/something.php.

How can i make those location block/s make domain.tld/something**.php** to use my try_files and send it to index.php?

Thanks in advance.

Working fine for me. Hope this will work for you as well.

location ~\.php$ {
    index index.php index.html;
    include fastcgi_params;
    fastcgi_pass unix:/var/run/php5-fpm.sock;
    fastcgi_index index.php;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    try_files /index.php /index.php;
}