tp5在apache下能访问，但放到nginx下报404

原因：多数是因为在nginx下找不到路由

if (!-d $request_filename){
            set $rule_0 1$rule_0;
                }
                if (!-f $request_filename){
            set $rule_0 2$rule_0;
                }
                if ($rule_0 = "21"){
          rewrite ^/(.*)$ /index.php/$1 last;
                }