remove-civicrm-base-page.php

<?php
/**
 * Plugin Name: Remove CiviCRM Base Page from Menu
 * Plugin URI: https://gist.github.com/christianwach/931bdf52803a35e363043ad0302fd4be
 * Description: Removes the CiviCRM Base Page from a front-end menu.
 * Author: Christian Wach
 * Version: 1.0
 * Author URI: https://haystack.co.uk
 */

// Exit if accessed directly.
defined( 'ABSPATH' ) || exit;

/**
 * Remove CiviCRM Base Page from Menu class.
 *
 * @since 1.0
 */
class Remove_CiviCRM_Base_Page_From_Menu {

	/**
	 * Constructor.
	 *
	 * @since 1.0
	 */
	public function __construct() {

		// Filter menu.
		add_action( 'wp_nav_menu_objects', [ $this, 'filter_menu' ], 20, 2 );

	}

	/**
	 * Filter the main menu on the root site.
	 *
	 * @since 1.0
	 *
	 * @param array $sorted_menu_items The menu items, sorted by each menu item's menu order.
	 * @param array $args Array of wp_nav_menu() arguments.
	 * @return $sorted_menu_items The filtered menu items.
	 */
	public function filter_menu( $sorted_menu_items, $args ) {

		// Only on front end.
		if ( is_admin() ) {
			return $sorted_menu_items;
		}

		// Bail if there's no CiviCRM.
		if ( ! function_exists( 'civi_wp' ) ) {
			return $sorted_menu_items;
		}

		// Bail if there's no CiviCRM base page.
		$basepage = civi_wp()->basepage->basepage_get();
		if ( ! ( $basepage instanceof WP_Post ) ) {
			return $sorted_menu_items;
		}

		// Remove item from array.
		$this->remove_item( $sorted_menu_items, 'post_type', get_permalink( $basepage->ID ) );

		// --<
		return $sorted_menu_items;

	}

	/**
	 * Filters the menu array to exclude a matched item.
	 *
	 * @since 1.0
	 *
	 * @param array $sorted_menu_items The menu items, sorted by each menu item's menu order.
	 * @param str $type The type of menu item we're looking for.
	 * @param array $url The URL we're looking for in the menu item's target URL.
	 */
	private function remove_item( &$sorted_menu_items, $type, $url ) {

		// Loop through the menu and get the menu item's key.
		foreach ( $sorted_menu_items as $key => $item ) {
			if ( $item->type === $type && $item->url === $url ) {
				$found = $key;
				break;
			}
		}

		// Remove it if we find it.
		if ( isset( $found ) ) {
			unset( $sorted_menu_items[ $found ] );
		}

	}

}

/**
 * Utility to get a reference to this plugin.
 *
 * @since 1.0
 *
 * @return object $plugin The plugin reference.
 */
function remove_civicrm_base_page_from_menu() {

	// Return instance.
	static $plugin;
	if ( ! isset( $plugin ) ) {
		$plugin = new Remove_CiviCRM_Base_Page_From_Menu();
	}
	return $plugin;

}

// Instantiate the class.
remove_civicrm_base_page_from_menu();