woocommerce_order_shipping_method │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_order_shipping_method', 'wp_kama_woocommerce_order_shipping_method_filter', 10, 2 );

/**
 * Function for `woocommerce_order_shipping_method` filter-hook.
 * 
 * @param  $implode 
 * @param  $that    
 *
 * @return 
 */
function wp_kama_woocommerce_order_shipping_method_filter( $implode, $that ){

	// filter...
	return $implode;
}

$implode

-

$that

-

Where the hook is called

return apply_filters( 'woocommerce_order_shipping_method', implode( ', ', $names ), $this );

Where the hook is used in WooCommerce