code: public function flush( $args, $assoc_args ) {
  		// make sure we detect mod_rewrite if configured in apache_modules in config
  		self::apache_modules();
  
  		if ( Utils\get_flag_value( $assoc_args, 'hard' ) && ! in_array( 'mod_rewrite', (array) WP_CLI::get_config( 'apache_modules' ), true ) ) {
  			WP_CLI::warning( 'Regenerating a .htaccess file requires special configuration. See usage docs.' );
  		}
  
  		if ( Utils\get_flag_value( $assoc_args, 'hard' ) && is_multisite() ) {
  			WP_CLI::warning( "WordPress can't generate .htaccess file for a multisite install." );
  		}
  
  		self::check_skip_plugins_themes();
  
  		flush_rewrite_rules( Utils\get_flag_value( $assoc_args, 'hard' ) );
  
  		if ( ! get_option( 'rewrite_rules' ) ) {
  			WP_CLI::warning( "Rewrite rules are empty, possibly because of a missing permalink_structure option. Use 'wp rewrite list' to verify, or 'wp rewrite structure' to update permalink_structure." );
  		} else {
  			WP_CLI::success( 'Rewrite rules flushed.' );
  		}
  	}
docs: Flushes rewrite rules.
  
  Resets WordPress' rewrite rules based on registered post types, etc.
  
  To regenerate a .htaccess file with WP-CLI, you'll need to add the mod_rewrite module
  to your wp-cli.yml or config.yml. For example:
  
  ```
  apache_modules:
  - mod_rewrite
  ```
  
  ## OPTIONS
  
  [--hard]
  : Perform a hard flush - update `.htaccess` rules as well as rewrite rules in database. Works only on single site installs.
  
  ## EXAMPLES
  
  $ wp rewrite flush
  Success: Rewrite rules flushed.