DE: Benutzerdefinierte Begriffsänderung (String Swap) für "Warenkorb-Zwischensumme" in WooCommerce - setzt Plugin "WooCommerce German (de_DE)" voraus! // EN: Custom String Swap for "Cart Subtotal" in WooCommerce - relies on active plugin "WooCommerce German (de_DE)"!

wcde-custom-string-swap-cart-total.php

<?php

/** Do NOT include the opening php tag */


add_action( 'get_header', 'wcde_custom_string_swap_cart_subtotal', 99 );
/**
 * String swap for "Cart Subtotal:"/ "Cart Subtotal" string in WooCommerce.
 *
 * NOTE: This snippet relies on active "WooCommerce German (de_DE)" plugin,
 *       version 3.1.0 or higher!
 *
 * @author David Decker - DECKERWEB
 * @link   http://deckerweb.de/twitter
 * @link   https://gist.github.com/deckerweb/9134266
 *
 * @uses   wcde_is_german() To determine if in German-locale based environment.
 * @uses   ddw_wcde_custom_strings_via_l10n_global() WCDE helper function for doing the string swap.
 */
function wcde_custom_string_swap_cart_subtotal() {

	/** Bail early if no WCDE, and no German-based enviroment */
	if ( ! function_exists( 'ddw_wcde_custom_strings_via_l10n_global' )
		&& ! wcde_is_german()
	) {

		return;

	}  // end if

	/**
	 * Helper filter, allows for custom disabling of string swaps.
	 *
	 * Usage: add_filter( 'wcde_filter_do_string_swaps', '__return_false' );
	 */
	$wcde_do_string_swaps = (bool) apply_filters( 'wcde_filter_do_string_swaps', '__return_true' );

	/**
	 * Bail early if our helper filter returns false.
	 */
	if ( ! $wcde_do_string_swaps ) {

		return;

	}  // end if

	/** Set up our array of planned string swap keys/ strings */
	$wcde_labels = array(

		/** Variant 1: "Cart Subtotal:" */
		'cart_subtotal_string_one' => array(
			'option_key'  => 'cart_subtotal_string_one',
			'strings'     => array( 'Cart Subtotal:' ),
			'translation' => 'Zwischensumme:',
		),

		/** Variant 2: "Cart Subtotal" */
		'cart_subtotal_string_two' => array(
			'option_key'  => 'cart_subtotal_string_two',
			'strings'     => array( 'Cart Subtotal' ),
			'translation' => 'Zwischensumme',
		),

	);  // end of array

	/** Apply our string swapper for each string or our array */
	foreach ( $wcde_labels as $wcde_label => $label_id ) {

		/** Actually load the various new label strings for display */
		ddw_wcde_custom_strings_via_l10n_global(
			$label_id[ 'option_key' ],
			(array) $label_id[ 'strings' ],
			$label_id[ 'translation' ],
			'woocommerce'
		);

	}  // end foreach

}  // end function

Thanks for this. In which directory I must put in this file?