File based page cache functions error in apache log

Can you check your file permissions on for your plugins (specifically the cache and file-based-cache-funcitons.php)

• All files should be 664.
• All folders should be 775.

All folders are 755. I tried to set the files in cache folder to 777 but the result is the same. So which directory has a permission problem for mkdir?

      if (empty($no_cache_because)) {

                $buffer = apply_filters('wpo_pre_cache_buffer', $buffer, $flags);

                $url_path = wpo_get_url_path();

                $dirs = explode('/', $url_path);

                $path = WPO_CACHE_FILES_DIR;

                foreach ($dirs as $dir) {
                        if (!empty($dir)) {
                                $path .= '/' . $dir;

                                if (!file_exists($path)) {
                                        if (!mkdir($path)) {
                                                $no_cache_because[] = __('Attempt to create subfolder within cache dire>
                                                break;
                                        }
                                }
                        }
                }
        }

• This reply was modified 9 months, 2 weeks ago by gygoole.

You usually get this error becuase

– the “wp-content” folder has the wrong permissions(recommended: 755)
– or there’s “user:group” issue
– or there’s… no free space left on device

Are other plugins able to create their folders/files in /wp-content? Could you check their folder permissions and ownership and if there’s still storage space available on your server/hosting plan?

The problem was in “/wp-content/cache/” folder. I had nobody:nogroup as owner. It started working when I changed to www-data:www-data. Can this create a security issue now?

Changing ownership to?ww-data?potentially made your site?less?secure. It is always best to have PHP run as a different user than the webserver, one that has FTP/SFTP access to the web-facing filesystem

You should consider using a FastCGI PHP handler such as PHP-FPM. It would let you run PHP as a (non-sudo) user with login privileges,