<form method="POST">
    <h3>Editing: wc-page-functions.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php
/**
 * WooCommerce Page Functions
 *
 * Functions related to pages and menus.
 *
 * @package  WooCommerce\Functions
 * @version  2.6.0
 */

defined( 'ABSPATH' ) || exit;

/**
 * Replace a page title with the endpoint title.
 *
 * @param  string $title Post title.
 * @return string
 */
function wc_page_endpoint_title( $title ) {
	global $wp_query;

	if ( ! is_null( $wp_query ) &amp;&amp; ! is_admin() &amp;&amp; is_main_query() &amp;&amp; in_the_loop() &amp;&amp; is_page() &amp;&amp; is_wc_endpoint_url() ) {
		$endpoint       = WC()-&gt;query-&gt;get_current_endpoint();
		$action         = isset( $_GET['action'] ) ? sanitize_text_field( wp_unslash( $_GET['action'] ) ) : '';
		$endpoint_title = WC()-&gt;query-&gt;get_endpoint_title( $endpoint, $action );
		$title          = $endpoint_title ? $endpoint_title : $title;

		remove_filter( 'the_title', 'wc_page_endpoint_title' );
	}

	return $title;
}

add_filter( 'the_title', 'wc_page_endpoint_title' );

/**
 * Retrieve page ids - used for myaccount, edit_address, shop, cart, checkout, pay, view_order, terms. returns -1 if no page is found.
 *
 * @param string $page Page slug.
 * @return int
 */
function wc_get_page_id( $page ) {
	if ( 'pay' === $page || 'thanks' === $page ) {
		wc_deprecated_argument( __FUNCTION__, '2.1', 'The &quot;pay&quot; and &quot;thanks&quot; pages are no-longer used - an endpoint is added to the checkout instead. To get a valid link use the WC_Order::get_checkout_payment_url() or WC_Order::get_checkout_order_received_url() methods instead.' );

		$page = 'checkout';
	}
	if ( 'change_password' === $page || 'edit_address' === $page || 'lost_password' === $page ) {
		wc_deprecated_argument( __FUNCTION__, '2.1', 'The &quot;change_password&quot;, &quot;edit_address&quot; and &quot;lost_password&quot; pages are no-longer used - an endpoint is added to the my-account instead. To get a valid link use the wc_customer_edit_account_url() function instead.' );

		$page = 'myaccount';
	}

	$page = apply_filters( 'woocommerce_get_' . $page . '_page_id', get_option( 'woocommerce_' . $page . '_page_id' ) );

	return $page ? absint( $page ) : -1;
}

/**
 * Retrieve page permalink.
 *
 * @param string      $page page slug.
 * @param string|bool $fallback Fallback URL if page is not set. Defaults to home URL. @since 3.4.0.
 * @return string
 */
function wc_get_page_permalink( $page, $fallback = null ) {
	$page_id   = wc_get_page_id( $page );
	$permalink = 0 &lt; $page_id ? get_permalink( $page_id ) : '';

	if ( ! $permalink ) {
		$permalink = is_null( $fallback ) ? get_home_url() : $fallback;
	}

	return apply_filters( 'woocommerce_get_' . $page . '_page_permalink', $permalink );
}

/**
 * Get endpoint URL.
 *
 * Gets the URL for an endpoint, which varies depending on permalink settings.
 *
 * @param  string $endpoint  Endpoint slug.
 * @param  string $value     Query param value.
 * @param  string $permalink Permalink.
 *
 * @return string
 */
function wc_get_endpoint_url( $endpoint, $value = '', $permalink = '' ) {
	if ( ! $permalink ) {
		$permalink = get_permalink();
	}

	// Map endpoint to options.
	$query_vars = WC()-&gt;query-&gt;get_query_vars();
	$endpoint   = ! empty( $query_vars[ $endpoint ] ) ? $query_vars[ $endpoint ] : $endpoint;
	$value      = ( get_option( 'woocommerce_myaccount_edit_address_endpoint', 'edit-address' ) === $endpoint ) ? wc_edit_address_i18n( $value ) : $value;

	if ( get_option( 'permalink_structure' ) ) {
		if ( strstr( $permalink, '?' ) ) {
			$query_string = '?' . wp_parse_url( $permalink, PHP_URL_QUERY );
			$permalink    = current( explode( '?', $permalink ) );
		} else {
			$query_string = '';
		}
		$url = trailingslashit( $permalink );

		if ( $value ) {
			$url .= trailingslashit( $endpoint ) . user_trailingslashit( $value );
		} else {
			$url .= user_trailingslashit( $endpoint );
		}

		$url .= $query_string;
	} else {
		$url = add_query_arg( $endpoint, $value, $permalink );
	}

	return apply_filters( 'woocommerce_get_endpoint_url', $url, $endpoint, $value, $permalink );
}

/**
 * Hide or adjust menu items conditionally.
 *
 * @param array $items Navigation items.
 * @return array
 */
function wc_nav_menu_items( $items ) {
	$logout_endpoint = get_option( 'woocommerce_logout_endpoint', 'customer-logout' );

	if ( ! empty( $logout_endpoint ) &amp;&amp; ! empty( $items ) &amp;&amp; is_array( $items ) ) {
		foreach ( $items as $key =&gt; $item ) {
			if ( empty( $item-&gt;url ) ) {
				continue;
			}

			$path           = wp_parse_url( $item-&gt;url, PHP_URL_PATH ) ?? '';
			$query          = wp_parse_url( $item-&gt;url, PHP_URL_QUERY ) ?? '';
			$is_logout_link = strstr( $path, $logout_endpoint ) || strstr( $query, $logout_endpoint );

			if ( ! $is_logout_link ) {
				continue;
			}

			if ( is_user_logged_in() ) {
				$items[ $key ]-&gt;url = wp_nonce_url( $item-&gt;url, 'customer-logout' );
			} else {
				unset( $items[ $key ] );
			}
		}
	}

	return $items;
}
add_filter( 'wp_nav_menu_objects', 'wc_nav_menu_items', 10 );

/**
 * Hide menu items in navigation blocks conditionally.
 *
 * Does the same thing as wc_nav_menu_items but for block themes.
 *
 * @since 9.3.0
 * @param \WP_Block_list $inner_blocks Inner blocks.
 * @return \WP_Block_list
 */
function wc_nav_menu_inner_blocks( $inner_blocks ) {
	$logout_endpoint = get_option( 'woocommerce_logout_endpoint', 'customer-logout' );

	if ( ! empty( $logout_endpoint ) &amp;&amp; $inner_blocks ) {
		foreach ( $inner_blocks as $inner_block_key =&gt; $inner_block ) {
			$url            = $inner_block-&gt;parsed_block['attrs']['url'] ?? '';
			$path           = wp_parse_url( $url, PHP_URL_PATH ) ?? '';
			$query          = wp_parse_url( $url, PHP_URL_QUERY ) ?? '';
			$is_logout_link = strstr( $path, $logout_endpoint ) || strstr( $query, $logout_endpoint );

			if ( ! $is_logout_link ) {
				continue;
			}

			if ( is_user_logged_in() ) {
				$inner_block-&gt;parsed_block['attrs']['url'] = wp_nonce_url( $inner_block-&gt;parsed_block['attrs']['url'], 'customer-logout' );
			} else {
				unset( $inner_blocks[ $inner_block_key ] );
			}
		}
	}

	return $inner_blocks;
}
add_filter( 'block_core_navigation_render_inner_blocks', 'wc_nav_menu_inner_blocks' );

/**
 * Fix active class in nav for shop page.
 *
 * @param array $menu_items Menu items.
 * @return array
 */
function wc_nav_menu_item_classes( $menu_items ) {
	if ( ! is_woocommerce() ) {
		return $menu_items;
	}

	$shop_page      = wc_get_page_id( 'shop' );
	$page_for_posts = (int) get_option( 'page_for_posts' );

	if ( ! empty( $menu_items ) &amp;&amp; is_array( $menu_items ) ) {
		foreach ( $menu_items as $key =&gt; $menu_item ) {
			$classes = (array) $menu_item-&gt;classes;
			$menu_id = (int) $menu_item-&gt;object_id;

			// Unset active class for blog page.
			if ( $page_for_posts === $menu_id &amp;&amp; isset( $menu_item-&gt;object ) &amp;&amp; 'page' === $menu_item-&gt;object ) {
				$menu_items[ $key ]-&gt;current = false;

				if ( in_array( 'current_page_parent', $classes, true ) ) {
					unset( $classes[ array_search( 'current_page_parent', $classes, true ) ] );
				}

				if ( in_array( 'current-menu-item', $classes, true ) ) {
					unset( $classes[ array_search( 'current-menu-item', $classes, true ) ] );
				}
			} elseif ( is_shop() &amp;&amp; $shop_page === $menu_id &amp;&amp; 'page' === $menu_item-&gt;object ) {
				// Set active state if this is the shop page link.
				$menu_items[ $key ]-&gt;current = true;
				$classes[]                   = 'current-menu-item';
				$classes[]                   = 'current_page_item';

			} elseif ( is_singular( 'product' ) &amp;&amp; $shop_page === $menu_id ) {
				// Set parent state if this is a product page.
				$classes[] = 'current_page_parent';
			}

			$menu_items[ $key ]-&gt;classes = array_unique( $classes );
		}
	}

	return $menu_items;
}
add_filter( 'wp_nav_menu_objects', 'wc_nav_menu_item_classes', 2 );


/**
 * Fix active class in wp_list_pages for shop page.
 *
 * See details in https://github.com/woocommerce/woocommerce/issues/177.
 *
 * @param string $pages Pages list.
 * @return string
 */
function wc_list_pages( $pages ) {
	if ( ! is_woocommerce() ) {
		return $pages;
	}

	// Remove current_page_parent class from any item.
	$pages = str_replace( 'current_page_parent', '', $pages );
	// Find shop_page_id through woocommerce options.
	$shop_page = 'page-item-' . wc_get_page_id( 'shop' );

	if ( is_shop() ) {
		// Add current_page_item class to shop page.
		return str_replace( $shop_page, $shop_page . ' current_page_item', $pages );
	}

	// Add current_page_parent class to shop page.
	return str_replace( $shop_page, $shop_page . ' current_page_parent', $pages );
}
add_filter( 'wp_list_pages', 'wc_list_pages' );
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