Capcake and PHP APC

Capcake and PHP APC

You need to empty the APC cache after a Capistrano/Capcake deploy, but you cannot do it from the command line since apc_cli and apc have different caches. You could restart your webserver (or nginx/pgp-fpm if you using that) but that means, for me, unnecessary downtime (even if it's only seconds).

This is how I solved it:

1. added a function to one of my controllers to clear cache
2. call that function after deploy

example function:

  function clearCache() {
            if (in_array(@$_SERVER['REMOTE_ADDR'], array('127.0.0.1', '::1'))) {
                    apc_clear_cache();
                    apc_clear_cache('user');
                    apc_clear_cache('opcode');
                    echo json_encode(array('APC Clear Cache' => true));
            }
            exit;
    }

and added to my deploy.rb file:

 namespace(:customs) do
   task :apc_cache_clea, :roles => :app do
     run <<-CMD
        curl --insecure -s https://localhost/housekeepings/clearCache
     CMD
   end
 end
 after "deploy:symlink", "customs:apc_cache_clear"

Thanks to jeremy@stackoverflow for a good direction.