default_checkout_(input) │ filter-hook │ WC 1.0

Usage

add_filter( 'default_checkout_(input)', 'wp_kama_default_checkout_input_filter', 10, 2 );

/**
 * Function for `default_checkout_(input)` filter-hook.
 * 
 * @param  $value 
 * @param  $input 
 *
 * @return 
 */
function wp_kama_default_checkout_input_filter( $value, $input ){

	// filter...
	return $value;
}

$value

-

$input

-

Where the hook is called

return apply_filters( 'default_checkout_' . $input, $value, $input );

Where the hook is used in WooCommerce