# rector > An automated tool for updating and refactoring PHP 5.3+ code. > More information: . - Process a specific directory: `rector process {{path/to/directory}}` - Process a directory without applying changes (dry run): `rector process {{path/to/directory}} --dry-run` - Process a directory and apply coding standards: `rector process {{path/to/directory}} --with-style` - Display a list of available levels: `rector levels` - Process a directory with a specific level: `rector process {{path/to/directory}} --level {{level_name}}`