Restrict WooCommerce products and shop access by user role with PHP
Hide WooCommerce products from guests, restrict specific products to wholesale user roles, and redirect unauthorised users away from checkout using WordPress capability checks.
How to Set Correct WordPress File and Folder Permissions
Incorrect file permissions are a common cause of WordPress errors like “Could not create directory” or “File is not writable” — and overly permissive settings (like 777 on files) are a serious security risk. The standard WordPress recommendation is 755 for directories and 644 for files.