Check opcache config

[Rahe]

This can be uselfull to check the opcache configuration options :

1. opcache.enable_file_override 1 to optimise the imports
2. opcache.max_accelerated_files >= 15000
3. opcache.interned_strings_buffer > 8
4. opcache.memory_consumption au moins 128MB
5. opcache.enable_cli 1 to optimize event on WP-CLI
6. opcache.validate_timestamps and opcache.revalidate_freq rightly configurer
7. opcache.save_comments 0
8. opcache.load_comments 0

For performance optimisations