How to set up Nginx to handle PHP-FPM FastCGI caching?

To set up Nginx to handle PHP-FPM FastCGI caching, you can follow these steps:

  1. Install Nginx and PHP-FPM on your server if you haven't done so already. You can use your package manager (e.g., apt, yum, etc.) to install them.

  2. Configure PHP-FPM to use a Unix socket by editing the PHP-FPM configuration file. Find the line that specifies the listen directive and change it to use a socket instead of a TCP address. For example:

    listen = /var/run/php-fpm.sock
  3. Restart PHP-FPM to apply the changes:

    sudo service php-fpm restart
  4. Configure Nginx to use PHP-FPM by editing the Nginx server block configuration file. Usually, it's located in /etc/nginx/sites-available/default or /etc/nginx/conf.d/default.conf. Add or modify the following lines within the server block:

    location ~ \.php$ { include snippets/fastcgi-php.conf; fastcgi_pass unix:/var/run/php-fpm.sock; }
  5. Enable FastCGI caching by adding the following lines to the server block:

    fastcgi_cache_path /path/to/cache levels=1:2 keys_zone=cache_zone:10m inactive=60m; fastcgi_cache_key "$scheme$request_method$host$request_uri"; fastcgi_cache_use_stale error timeout invalid_header updating http_500; fastcgi_cache_valid 200 302 10m; fastcgi_cache_valid 404 1m; fastcgi_ignore_headers Cache-Control Expires;
  6. Add the following lines within the location block to enable FastCGI caching for PHP scripts:

    fastcgi_cache cache_zone; fastcgi_cache_valid 200 30s; fastcgi_cache_bypass $skip_cache; fastcgi_no_cache $skip_cache; add_header X-Cache $upstream_cache_status;
  7. Test the Nginx configuration for syntax errors:

    sudo nginx -t
  8. If the configuration test is successful, reload Nginx to apply the changes:

    sudo service nginx reload

Now, Nginx is set up to handle PHP-FPM FastCGI caching. Make sure to adjust the cache settings according to your needs and server resources.