if (!-d $request_filename){
    set $rule_0 1$rule_0;
}
if ($rule_0 = "1"){
 rewrite ^/(.+)/$ /$1 permanent;
}
#ignored: "-" thing used or unknown variable in regex/rew
if (!-f $request_filename){
    set $rule_2 1$rule_2;
}
if (!-d $request_filename){
    set $rule_2 2$rule_2;
}
if ($rule_2 = "21"){
 rewrite ^/(.*)$ /index.php?/$1 last;
}