woocommerce_shipping_(id)_option │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_shipping_(id)_option', 'wp_kama_woocommerce_shipping_id_option_filter', 10, 3 );

/**
 * Function for `woocommerce_shipping_(id)_option` filter-hook.
 * 
 * @param  $option 
 * @param  $key    
 * @param  $that   
 *
 * @return 
 */
function wp_kama_woocommerce_shipping_id_option_filter( $option, $key, $that ){

	// filter...
	return $option;
}

$option

-

$key

-

$that

-

Where the hook is called

$option = apply_filters( 'woocommerce_shipping_' . $this->id . '_option', parent::get_option( $key, $empty_value ), $key, $this );

Where the hook is used in WooCommerce