woocommerce_countries_base_country │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_countries_base_country', 'wp_kama_woocommerce_countries_base_country_filter' );

/**
 * Function for `woocommerce_countries_base_country` filter-hook.
 * 
 * @param  $default_country 
 *
 * @return 
 */
function wp_kama_woocommerce_countries_base_country_filter( $default_country ){

	// filter...
	return $default_country;
}

$default_country

-

Where the hook is called

return apply_filters( 'woocommerce_countries_base_country', $default['country'] );

Where the hook is used in WooCommerce