fastcgi_cache

## DEFAULT
set $no_cache 0;


## RULES
if ( $request_uri ~ "/wp-" ) {
    set $no_cache 1;
}
if ( $http_cookie ~ (wp-postpass|wordpress_logged_in|comment_author)_ ) {
    set $no_cache 1;
}


## INIT
fastcgi_cache microcache;
fastcgi_cache_use_stale updating;
fastcgi_hide_header "Set-Cookie";
fastcgi_cache_valid any 30m;
fastcgi_no_cache $no_cache;
fastcgi_cache_bypass $no_cache;


## HEADER
add_header X-Cache $upstream_cache_status;

nginx.conf

http {
    
    ## ... ##
    
	fastcgi_cache_path /var/cache/nginx levels=1:2 keys_zone=microcache:5m max_size=5m inactive=1h;
	fastcgi_cache_key "$request_method|$http_if_modified_since|$http_if_none_match|$host|$request_uri";
    
    ## ... ##
}

server

server {
    
    ## ... ##
    
    location ~ \.php$ {
    
        ## ... ##
        
        include /etc/nginx/conf.d/fastcgi_cache;
        
        ## ... ##
    }
    
    ## ... ##
}